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958 lines
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958 lines
561 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<class-scheme publication-date="2023-02-01" scheme-type="cpc" publication-type="official">
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<classification-item breakdown-code="false" not-allocatable="true" level="5" additional-only="false" sort-key="G01S" definition-exists="true" date-revised="2019-08-01" status="published"><classification-symbol>G01S</classification-symbol><class-title date-revised="2019-08-01"><title-part><text>RADIO DIRECTION-FINDING</text></title-part><title-part><text>RADIO NAVIGATION</text></title-part><title-part><text>DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES</text></title-part><title-part><text>LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES</text></title-part><title-part><text>ANALOGOUS ARRANGEMENTS USING OTHER WAVES</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> In this subclass, the following term is used with the meaning indicated: <subnote type="bullet"><note-paragraph>"transponder" means an arrangement which reacts to an incoming interrogating or detecting wave by emitting a specific answering or identifying wave.</note-paragraph></subnote></note-paragraph><note-paragraph>Attention is drawn to the Notes following the title of class <class-ref scheme="cpc">G01</class-ref> and to Note (1) following the title of subclass <class-ref scheme="cpc">G09B</class-ref>.</note-paragraph></note><note type="warning"><note-paragraph warning-type="ipc-not-used">The following IPC groups are not in the CPC scheme. The subject matter for these IPC groups is classified in the following CPC groups: <table><row><entry><class-ref scheme="ipc">G01S7/26</class-ref></entry><entry> covered by </entry><entry><class-ref scheme="cpc">G01S7/06</class-ref></entry></row></table></note-paragraph><note-paragraph>In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="true" level="6" additional-only="false" sort-key="G01S1/00" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/00</classification-symbol>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G01S1/00" definition-exists="true" ipc-concordant="G01S1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters</text></title-part><title-part><text>Receivers co-operating therewith </text><reference><text>position fixing by co-ordinating a plurality of determinations of direction or position lines <class-ref scheme="cpc">G01S5/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S1/02" definition-exists="false" ipc-concordant="G01S1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using radio waves </text><reference><text><class-ref scheme="cpc">G01S19/00</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S1/022" definition-exists="false" ipc-concordant="G01S1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for monitoring or calibrating</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S1/024" definition-exists="false" ipc-concordant="G01S1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/024</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of beacon transmitters</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S1/026" definition-exists="false" ipc-concordant="G01S1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of associated receivers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S1/028" definition-exists="true" ipc-concordant="G01S1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Simulation means, e.g. of beacon signals therefor </text><reference><text>for teaching or training purposes <class-ref scheme="cpc">G09B9/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S1/04" definition-exists="false" ipc-concordant="G01S1/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S1/042" definition-exists="false" ipc-concordant="G01S1/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G01S1/042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Transmitters</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S1/0423" definition-exists="false" ipc-concordant="G01S1/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G01S1/0423</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>Mounting or deployment thereof</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S1/0426" definition-exists="false" ipc-concordant="G01S1/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G01S1/0426</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>Collocated with electrical equipment other than beacons </text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S1/0428" definition-exists="false" ipc-concordant="G01S1/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G01S1/0428</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>Signal details</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S1/045" definition-exists="false" ipc-concordant="G01S1/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Receivers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S1/047" definition-exists="false" ipc-concordant="G01S1/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/047</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Displays or indicators </text><reference><text><class-ref scheme="cpc">G01S1/06</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S1/06" definition-exists="false" ipc-concordant="G01S1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for providing multiple indication, e.g. coarse and fine indications</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S1/08" definition-exists="true" ipc-concordant="G01S1/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>G01S1/08</classification-symbol><class-title date-revised="2019-08-01"><title-part><text>Systems for determining direction or position line</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S1/10" definition-exists="false" ipc-concordant="G01S1/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G01S1/10</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>using amplitude comparison of signals transmitted sequentially from antennas or antenna systems having differently-oriented overlapping directivity characteristics, e.g. equi-signal A-N type</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S1/12" definition-exists="false" ipc-concordant="G01S1/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G01S1/12</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>the signals being transmitted sequentially from an antenna or antenna system having the orientation of its directivity characteristic periodically varied, e.g. by means of sequentially effective reflectors</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S1/14" definition-exists="false" ipc-concordant="G01S1/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G01S1/14</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>using amplitude comparison of signals transmitted simultaneously from antennas or antenna systems having differently oriented overlapping directivity-characteristics</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S1/16" definition-exists="false" ipc-concordant="G01S1/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Azimuthal guidance systems, e.g. system for defining aircraft approach path, localiser system</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S1/18" definition-exists="false" ipc-concordant="G01S1/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Elevational guidance systems, e.g. system for defining aircraft glide path</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S1/20" definition-exists="true" ipc-concordant="G01S1/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G01S1/20</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>using a comparison of transit time of synchronised signals transmitted from non-directional antennas or antenna systems spaced apart, i.e. path-difference systems</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S1/22" definition-exists="false" ipc-concordant="G01S1/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the synchronised signals being frequency modulations on carrier waves and the transit times being compared by measuring difference of instantaneous frequencies of received carrier waves</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S1/24" definition-exists="true" ipc-concordant="G01S1/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G01S1/24</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>the synchronised signals being pulses or equivalent modulations on carrier waves and the transit times being compared by measuring the difference in arrival time of a significant part of the modulations </text><CPC-specific-text><text>, e.g. LORAN systems</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S1/245" definition-exists="true" ipc-concordant="G01S1/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/245</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details of receivers cooperating therewith, e.g. determining positive zero crossing of third cycle in LORAN-C</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S1/26" definition-exists="false" ipc-concordant="G01S1/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G01S1/26</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Systems in which pulses or time-base signals are generated locally at the receiver and brought into predetermined time-relationship with received signals, e.g. pulse duration coincides with time interval between arrival of significant part of modulation of signals received from first and second antennas or antenna systems</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S1/28" definition-exists="false" ipc-concordant="G01S1/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>wherein the predetermined time-relationship is maintained automatically </text><CPC-specific-text><text>contains no documents</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S1/30" definition-exists="false" ipc-concordant="G01S1/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the synchronised signals being continuous waves or intermittent trains of continuous waves, the intermittency not being for the purpose of determining direction or position line and the transit times being compared by measuring the phase difference</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S1/302" definition-exists="false" ipc-concordant="G01S1/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/302</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Systems in which the direction is determined by using an interferometric type transmitting antenna array</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S1/304" definition-exists="true" ipc-concordant="G01S1/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/304</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Analogous systems in which a beat frequency, obtained by heterodyning the signals, is compared in phase with a reference signal obtained by heterodyning the signals in a fixed reference point and transmitted therefrom, e.g. LORAC (long range accuracy) or TORAN systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S1/306" definition-exists="true" ipc-concordant="G01S1/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/306</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Analogous systems in which frequency-related signals (harmonics) are compared in phase, e.g. DECCA systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S1/308" definition-exists="true" ipc-concordant="G01S1/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/308</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>particularly adapted to Omega systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S1/32" definition-exists="false" ipc-concordant="G01S1/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Systems in which the signals received, with or without amplification, or signals derived therefrom, are compared in phase directly </text><CPC-specific-text><text>contains no documents</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S1/34" definition-exists="false" ipc-concordant="G01S1/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G01S1/34</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Systems in which first and second synchronised signals are transmitted from both antennas or antenna systems and a beat frequency, obtained by heterodyning the first signals with each other is compared in phase with a beat frequency obtained by heterodyning the second signals with each other</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S1/36" definition-exists="false" ipc-concordant="G01S1/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Systems in which a beat frequency, obtained by heterodyning the synchronised signals, is compared in phase with a reference signal having a phase substantially independent of direction </text><CPC-specific-text><text>contains no documents</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S1/38" definition-exists="false" ipc-concordant="G01S1/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G01S1/38</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>using comparison of [1] the phase of the envelope of the change of frequency, due to Doppler effect, of the signal transmitted by an antenna moving, or appearing to move, in a cyclic path with [2] the phase of a reference signal, the frequency of this reference signal being synchronised with that of the cyclic movement, or apparent cyclic movement, of the antenna</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S1/40" definition-exists="false" ipc-concordant="G01S1/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G01S1/40</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>the apparent movement of the antenna being produced by cyclic sequential energisation of fixed antennas</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S1/42" definition-exists="false" ipc-concordant="G01S1/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Conical-scan beacons transmitting signals which indicate at a mobile receiver any displacement of the receiver from the conical-scan axis, e.g. for "beam-riding" missile control</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S1/44" definition-exists="false" ipc-concordant="G01S1/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Rotating or oscillating beam beacons defining directions in the plane of rotation or oscillation</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S1/46" definition-exists="false" ipc-concordant="G01S1/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Broad-beam systems producing at a receiver a substantially continuous sinusoidal envelope signal of the carrier wave of the beam, the phase angle of which is dependent upon the angle between the direction of the receiver from the beacon and a reference direction from the beacon, e.g. cardioid system</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S1/465" definition-exists="false" ipc-concordant="G01S1/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/465</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using time-varying interference fields</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S1/48" definition-exists="true" ipc-concordant="G01S1/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>wherein the phase angle of the direction-dependent envelope signal is a multiple of the direction angle, e.g. for "fine" bearing indication </text><CPC-specific-text><text>TACAN</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S1/50" definition-exists="true" ipc-concordant="G01S1/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>wherein the phase angle of the direction-dependent envelope signal is compared with a non-direction-dependent reference signal, </text><CPC-specific-text><text>e.g. VOR</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S1/52" definition-exists="false" ipc-concordant="G01S1/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>wherein the phase angles of a plurality of direction-dependent envelope signals produced by a plurality of beams rotating at different speeds or in different directions are compared</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S1/54" definition-exists="false" ipc-concordant="G01S1/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/54</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Narrow-beam systems producing at a receiver a pulse-type envelope signal of the carrier wave of the beam, the timing of which is dependent upon the angle between the direction of the receiver from the beacon and a reference direction from the beacon</text></title-part><title-part><text>Overlapping broad beam systems defining a narrow zone and producing at a receiver a pulse-type envelope signal of the carrier wave of the beam, the timing of which is dependent upon the angle between the direction of the receiver from the beacon and a reference direction from the beacon</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S1/56" definition-exists="false" ipc-concordant="G01S1/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/56</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Timing the pulse-type envelope signals derived by reception of the beam</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S1/58" definition-exists="false" ipc-concordant="G01S1/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/58</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>wherein a characteristic of the beam transmitted or of an auxiliary signal is varied in time synchronously with rotation or oscillation of the beam</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S1/60" definition-exists="false" ipc-concordant="G01S1/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/60</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Varying frequency of beam signal or of auxiliary signal</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S1/62" definition-exists="false" ipc-concordant="G01S1/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/62</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Varying phase-relationship between beam and auxiliary signal</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S1/64" definition-exists="false" ipc-concordant="G01S1/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/64</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Varying pulse timing, e.g. varying interval between pulses radiated in pairs</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S1/66" definition-exists="false" ipc-concordant="G01S1/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/66</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Superimposing direction-indicating intelligence signals, e.g. speech, Morse</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S1/68" definition-exists="false" ipc-concordant="G01S1/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/68</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Marker, boundary, call-sign, or like beacons transmitting signals not carrying directional information</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S1/685" definition-exists="false" ipc-concordant="G01S1/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/685</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using pulse modulation, e.g. pulse frequency modulation</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S1/70" definition-exists="true" ipc-concordant="G01S1/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G01S1/70</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using electromagnetic waves other than radio waves</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S1/703" definition-exists="false" ipc-concordant="G01S1/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G01S1/703</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>Details</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S1/7032" definition-exists="false" ipc-concordant="G01S1/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G01S1/7032</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>Transmitters</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S1/7034" definition-exists="false" ipc-concordant="G01S1/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G01S1/7034</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>Mounting or deployment thereof</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S1/7036" definition-exists="false" ipc-concordant="G01S1/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G01S1/7036</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>Collocated with electrical equipment other than beacons</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S1/7038" definition-exists="false" ipc-concordant="G01S1/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G01S1/7038</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>Signal details</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S1/705" definition-exists="false" ipc-concordant="G01S1/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/705</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using gamma or X-rays</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S1/72" definition-exists="false" ipc-concordant="G01S1/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>G01S1/72</classification-symbol><class-title date-revised="2019-08-01"><title-part><text>using ultrasonic, sonic or infrasonic waves</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S1/725" definition-exists="false" ipc-concordant="G01S1/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/725</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Marker, boundary, call-sign or like beacons transmitting signals not carrying directional information</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S1/74" definition-exists="false" ipc-concordant="G01S1/74" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G01S1/74</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S1/75" definition-exists="false" ipc-concordant="G01S1/74" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G01S1/75</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>Transmitters</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S1/751" definition-exists="false" ipc-concordant="G01S1/74" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G01S1/751</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>Mounting or deployment thereof</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S1/752" definition-exists="false" ipc-concordant="G01S1/74" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G01S1/752</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>Collocated with electrical equipment other than beacons </text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S1/753" definition-exists="false" ipc-concordant="G01S1/74" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G01S1/753</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>Signal details</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S1/76" definition-exists="true" ipc-concordant="G01S1/76" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-08-01" status="published"><classification-symbol>G01S1/76</classification-symbol><class-title date-revised="2019-08-01"><title-part><text>Systems for determining direction or position line</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S1/763" definition-exists="false" ipc-concordant="G01S1/76" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/763</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using the Doppler shift introduced by the relative motion between beacon and receiver</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S1/766" definition-exists="false" ipc-concordant="G01S1/76" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/766</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Conical-scan beam beacons transmitting signals which indicate at a mobile receiver any displacement of the receiver from the conical-scan axis</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S1/78" definition-exists="false" ipc-concordant="G01S1/78" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/78</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using amplitude comparison of signals transmitted from transducers or transducer systems having differently-oriented characteristics</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S1/783" definition-exists="false" ipc-concordant="G01S1/78" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/783</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the signals being transmitted sequentially</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S1/786" definition-exists="false" ipc-concordant="G01S1/78" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/786</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the signals being transmitted simultaneously</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S1/80" definition-exists="false" ipc-concordant="G01S1/80" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/80</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a comparison of transit time of synchronised signals transmitted from non-directional transducers or transducer systems spaced apart, i.e. path-difference systems</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S1/802" definition-exists="false" ipc-concordant="G01S1/80" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/802</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the synchronised signals being frequency modulations on carrier waves and the transit times being compared by measuring difference of instantaneous frequencies of received carrier waves</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S1/805" definition-exists="false" ipc-concordant="G01S1/80" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/805</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the synchronised signals being pulses or equivalent modulations on carrier waves and the transit times being compared by measuring the difference in arrival time of a significant part of the modulations</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S1/807" definition-exists="false" ipc-concordant="G01S1/80" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/807</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the synchronised signals being continuous waves or intermittent trains of continuous waves, the intermittency not being for the purpose of determining direction or position line and the transit times being compared by measuring the phase difference</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S1/82" definition-exists="false" ipc-concordant="G01S1/82" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S1/82</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Rotating or oscillating beam beacons defining directions in the plane of rotation or oscillation</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G01S3/00" definition-exists="true" ipc-concordant="G01S3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S3/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received </text><reference><text>position-fixing by co-ordinating a plurality of determinations of direction or position lines <class-ref scheme="cpc">G01S5/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S3/02" definition-exists="false" ipc-concordant="G01S3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using radio waves</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S3/023" definition-exists="false" ipc-concordant="G01S3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Monitoring or calibrating</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S3/026" definition-exists="false" ipc-concordant="G01S3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Simulating means therefor</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S3/04" definition-exists="false" ipc-concordant="G01S3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S3/043" definition-exists="false" ipc-concordant="G01S3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/043</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Receivers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S3/046" definition-exists="false" ipc-concordant="G01S3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/046</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Displays or indicators</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S3/06" definition-exists="false" ipc-concordant="G01S3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G01S3/06</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Means for increasing effective directivity, e.g. by combining signals having differently oriented directivity characteristics or by sharpening the envelope waveform of the signal derived from a rotating or oscillating beam antenna </text><reference><text>comparing amplitude of signals having differently oriented directivity characteristics to determine direction <class-ref scheme="cpc">G01S3/16</class-ref>, <class-ref scheme="cpc">G01S3/28</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S3/065" definition-exists="false" ipc-concordant="G01S3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by using non-directional aerial</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S3/08" definition-exists="false" ipc-concordant="G01S3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G01S3/08</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Means for reducing polarisation errors, e.g. by use of Adcock or spaced loop antenna systems</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S3/085" definition-exists="false" ipc-concordant="G01S3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by using spaced loop aerial systems</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S3/10" definition-exists="false" ipc-concordant="G01S3/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for reducing or compensating for quadrantal, site, or like errors</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S3/12" definition-exists="false" ipc-concordant="G01S3/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G01S3/12</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Means for determining sense of direction, e.g. by combining signals from directional antenna or goniometer search coil with those from non-directional antenna </text><reference><text>determining direction by amplitude comparison of signals derived by combining directional and non-directional signals <class-ref scheme="cpc">G01S3/24</class-ref>, <class-ref scheme="cpc">G01S3/34</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S3/14" definition-exists="false" ipc-concordant="G01S3/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Systems for determining direction or deviation from predetermined direction </text><CPC-specific-text><reference><text>aerial arrangements for changing or varying the orientation or the shape of the directional pattern <class-ref scheme="cpc">H01Q3/00</class-ref>; combinations of different interacting aerial units for giving a desired directional characteristic <class-ref scheme="cpc">H01Q21/29</class-ref>; aerials or aerial systems providing at least two radiation patterns <class-ref scheme="cpc">H01Q25/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S3/143" definition-exists="false" ipc-concordant="G01S3/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/143</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by vectorial combination of signals derived from differently oriented antennae</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S3/146" definition-exists="true" ipc-concordant="G01S3/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S3/146</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>by comparing linear polarisation components</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S3/16" definition-exists="false" ipc-concordant="G01S3/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G01S3/16</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>using amplitude comparison of signals derived sequentially from receiving antennas or antenna systems having differently-oriented directivity characteristics or from an antenna system having periodically-varied orientation of directivity characteristic</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S3/18" definition-exists="false" ipc-concordant="G01S3/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G01S3/18</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>derived directly from separate directional antennas</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S3/20" definition-exists="false" ipc-concordant="G01S3/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G01S3/20</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>derived by sampling signal received by an antenna system having periodically-varied orientation of directivity characteristic</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S3/22" definition-exists="false" ipc-concordant="G01S3/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G01S3/22</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>derived from different combinations of signals from separate antennas, e.g. comparing sum with difference</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S3/24" definition-exists="false" ipc-concordant="G01S3/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G01S3/24</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>the separate antennas comprising one directional antenna and one non-directional antenna, e.g. combination of loop and open antennas producing a reversed cardioid directivity characteristic</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S3/26" definition-exists="false" ipc-concordant="G01S3/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G01S3/26</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>the separate antennas having differently-oriented directivity characteristics</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S3/28" definition-exists="false" ipc-concordant="G01S3/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G01S3/28</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>using amplitude comparison of signals derived simultaneously from receiving antennas or antenna systems having differently-oriented directivity characteristics</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S3/30" definition-exists="false" ipc-concordant="G01S3/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>derived directly from separate directional systems</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S3/32" definition-exists="false" ipc-concordant="G01S3/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G01S3/32</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>derived from different combinations of signals from separate antennas, e.g. comparing sum with difference</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S3/325" definition-exists="false" ipc-concordant="G01S3/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/325</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Automatic tracking systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S3/34" definition-exists="false" ipc-concordant="G01S3/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G01S3/34</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>the separate antennas comprising one directional antenna and one non-directional antenna, e.g. combination of loop and open antennas producing a reversed cardioid directivity characteristic</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S3/36" definition-exists="false" ipc-concordant="G01S3/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G01S3/36</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>the separate antennas having differently-oriented directivity characteristics</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S3/38" definition-exists="false" ipc-concordant="G01S3/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G01S3/38</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>using adjustment of real or effective orientation of directivity characteristic of an antenna or an antenna system to give a desired condition of signal derived from that antenna or antenna system, e.g. to give a maximum or minimum signal </text><reference><text><class-ref scheme="cpc">G01S3/16</class-ref>, <class-ref scheme="cpc">G01S3/28</class-ref> take precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S3/40" definition-exists="false" ipc-concordant="G01S3/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G01S3/40</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>adjusting orientation of a single directivity characteristic to produce maximum or minimum signal, e.g. rotatable loop antenna or equivalent goniometer system</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S3/42" definition-exists="false" ipc-concordant="G01S3/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the desired condition being maintained automatically</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S3/44" definition-exists="false" ipc-concordant="G01S3/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the adjustment being varied periodically or continuously until it is halted automatically when the desired condition is attained</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S3/46" definition-exists="false" ipc-concordant="G01S3/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G01S3/46</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>using antennas spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S3/465" definition-exists="false" ipc-concordant="G01S3/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/465</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the waves arriving at the aerials being frequency modulated and the frequency difference of signals therefrom being measured</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S3/48" definition-exists="false" ipc-concordant="G01S3/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G01S3/48</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>the waves arriving at the antennas being continuous or intermittent and the phase difference of signals derived therefrom being measured</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S3/50" definition-exists="false" ipc-concordant="G01S3/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G01S3/50</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>the waves arriving at the antennas being pulse modulated and the time difference of their arrival being measured</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S3/52" definition-exists="false" ipc-concordant="G01S3/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G01S3/52</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>using a receiving antenna moving, or appearing to move, in a cyclic path to produce a Doppler variation of frequency of the received signal</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S3/54" definition-exists="false" ipc-concordant="G01S3/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G01S3/54</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>the apparent movement of the antenna being produced by coupling the receiver cyclically and sequentially to each of several fixed spaced antennas</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S3/56" definition-exists="false" ipc-concordant="G01S3/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/56</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Conical-scan beam systems using signals indicative of the deviation of the direction of reception from the scan axis</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S3/58" definition-exists="false" ipc-concordant="G01S3/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/58</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Rotating or oscillating beam systems using continuous analysis of received signal for determining direction in the plane of rotation or oscillation or for determining deviation from a predetermined direction in such a plane </text><reference><text><class-ref scheme="cpc">G01S3/14</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S3/60" definition-exists="false" ipc-concordant="G01S3/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/60</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Broad-beam systems producing in the receiver a substantially sinusoidal envelope signal of the carrier wave of the beam, the phase angle of which is dependent upon the angle between the direction of the transmitter from the receiver and a reference direction from the receiver, e.g. cardioid system</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S3/62" definition-exists="false" ipc-concordant="G01S3/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/62</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>wherein the phase angle of the signal is indicated by a cathode-ray tube</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S3/64" definition-exists="false" ipc-concordant="G01S3/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/64</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>wherein the phase angle of the signal is determined by phase comparison with a reference alternating signal varying in synchronism with the directivity variation</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S3/66" definition-exists="false" ipc-concordant="G01S3/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/66</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Narrow-beam systems producing in the receiver a pulse-type envelope signal of the carrier wave of the beam, the timing of which is dependent upon the angle between the direction of the transmitter from the receiver and a reference direction from the receiver</text></title-part><title-part><text>Overlapping broad-beam systems defining in the receiver a narrow zone and producing a pulse-type envelope signal of the carrier wave of the beam, the timing of which is dependent upon the angle between the direction of the transmitter from the receiver and a reference direction from the receiver</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S3/68" definition-exists="true" ipc-concordant="G01S3/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S3/68</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>wherein the timing of the pulse-type envelope signal is indicated by cathode-ray tube</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S3/70" definition-exists="false" ipc-concordant="G01S3/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/70</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>wherein the timing of the pulse-type envelope signal is determined by bringing a locally-generated pulse-type signal into coincidence or other predetermined time-relationship with the envelope signal</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S3/72" definition-exists="false" ipc-concordant="G01S3/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/72</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Diversity systems specially adapted for direction-finding</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S3/74" definition-exists="false" ipc-concordant="G01S3/74" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-01-01" status="published"><classification-symbol>G01S3/74</classification-symbol><class-title date-revised="2018-01-01"><title-part><text>Multi-channel systems specially adapted for direction-finding, i.e. having a single antenna system capable of giving simultaneous indications of the directions of different signals </text><reference><text>systems in which the directions of different signals are determined sequentially and displayed simultaneously <class-ref scheme="cpc">G01S3/04</class-ref>, <class-ref scheme="cpc">G01S3/14</class-ref></text></reference></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S3/78" definition-exists="false" ipc-concordant="G01S3/78" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/78</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using electromagnetic waves other than radio waves</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S3/7803" definition-exists="false" ipc-concordant="G01S3/78" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/7803</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for monitoring or calibrating</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S3/7806" definition-exists="false" ipc-concordant="G01S3/78" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/7806</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using gamma or X-rays</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S3/781" definition-exists="false" ipc-concordant="G01S3/781" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/781</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S3/782" definition-exists="false" ipc-concordant="G01S3/782" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/782</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Systems for determining direction or deviation from predetermined direction</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S3/783" definition-exists="false" ipc-concordant="G01S3/783" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/783</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using amplitude comparison of signals derived from static detectors or detector systems</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S3/7835" definition-exists="false" ipc-concordant="G01S3/783" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/7835</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using coding masks</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S3/784" definition-exists="false" ipc-concordant="G01S3/784" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/784</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a mosaic of detectors</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S3/785" definition-exists="false" ipc-concordant="G01S3/785" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/785</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using adjustment of orientation of directivity characteristics of a detector or detector system to give a desired condition of signal derived from that detector or detector system</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S3/786" definition-exists="false" ipc-concordant="G01S3/786" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S3/786</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>the desired condition being maintained automatically</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S3/7861" definition-exists="false" ipc-concordant="G01S3/786" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/7861</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Solar tracking systems</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S3/7862" definition-exists="false" ipc-concordant="G01S3/786" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G01S3/7862</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>mounted on a moving platform, e.g. space vehicle</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S3/7864" definition-exists="false" ipc-concordant="G01S3/786" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/7864</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>T.V. type tracking systems</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S3/7865" definition-exists="false" ipc-concordant="G01S3/786" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/7865</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using correlation of the live video image with a stored image</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S3/7867" definition-exists="false" ipc-concordant="G01S3/786" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/7867</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Star trackers </text><reference><text>navigation using star trackers <class-ref scheme="cpc">G01C21/025</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S3/7868" definition-exists="false" ipc-concordant="G01S3/786" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/7868</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using horizon sensors</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S3/787" definition-exists="false" ipc-concordant="G01S3/787" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S3/787</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>using rotating reticles producing a direction-dependent modulation characteristic</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S3/788" definition-exists="false" ipc-concordant="G01S3/788" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/788</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>producing a frequency modulation characteristic</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S3/789" definition-exists="false" ipc-concordant="G01S3/789" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/789</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using rotating or oscillating beam systems, e.g. using mirrors, prisms</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S3/80" definition-exists="false" ipc-concordant="G01S3/80" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/80</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using ultrasonic, sonic or infrasonic waves</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S3/8003" definition-exists="false" ipc-concordant="G01S3/80" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/8003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Diversity systems specially adapted for direction finding</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S3/8006" definition-exists="false" ipc-concordant="G01S3/80" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/8006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multi-channel systems specially adapted for direction-finding, i.e. having a single aerial system capable of giving simultaneous indications of the directions of different signals</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S3/801" definition-exists="false" ipc-concordant="G01S3/801" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/801</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G01S3/82</class-ref>, <class-ref scheme="cpc">G01S3/84</class-ref>, <class-ref scheme="cpc">G01S3/86</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S3/802" definition-exists="true" ipc-concordant="G01S3/802" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S3/802</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Systems for determining direction or deviation from predetermined direction</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S3/8022" definition-exists="false" ipc-concordant="G01S3/802" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/8022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using the Doppler shift introduced by the relative motion between source and receiver</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S3/8025" definition-exists="false" ipc-concordant="G01S3/802" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/8025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Conical-scan beam systems using signals indicative of the deviation of the direction of reception from the scan axis</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S3/8027" definition-exists="false" ipc-concordant="G01S3/802" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/8027</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>By vectorial composition of signals received by plural, differently-oriented transducers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S3/803" definition-exists="false" ipc-concordant="G01S3/803" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/803</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using amplitude comparison of signals derived from receiving transducers or transducer systems having differently-oriented directivity characteristics</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S3/8032" definition-exists="false" ipc-concordant="G01S3/803" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/8032</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the signals are derived sequentially</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S3/8034" definition-exists="false" ipc-concordant="G01S3/803" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/8034</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the signals are derived simultaneously</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S3/8036" definition-exists="false" ipc-concordant="G01S3/803" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/8036</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>derived directly from separate directional systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S3/8038" definition-exists="false" ipc-concordant="G01S3/803" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/8038</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>derived from different combinations of signals from separate transducers comparing sum with difference</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S3/805" definition-exists="false" ipc-concordant="G01S3/805" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G01S3/805</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>using adjustment of real or effective orientation of directivity characteristics of a transducer or transducer system to give a desired condition of signal derived from that transducer or transducer system, e.g. to give a maximum or minimum signal</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S3/8055" definition-exists="false" ipc-concordant="G01S3/805" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/8055</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>adjusting orientation of a single directivity characteristic to produce maximum or minimum signal</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S3/807" definition-exists="false" ipc-concordant="G01S3/807" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/807</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the desired condition being maintained automatically</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S3/808" definition-exists="false" ipc-concordant="G01S3/808" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/808</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using transducers spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S3/8083" definition-exists="false" ipc-concordant="G01S3/808" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/8083</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>determining direction of source</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S3/8086" definition-exists="false" ipc-concordant="G01S3/808" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/8086</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>determining other position line of source</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S3/809" definition-exists="false" ipc-concordant="G01S3/809" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/809</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Rotating or oscillating beam systems using continuous analysis of received signal for determining direction in the plane of rotation or oscillation or for determining deviation from a predetermined direction in such a plane</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S3/82" definition-exists="false" ipc-concordant="G01S3/82" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/82</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with means for adjusting phase or compensating for time-lag errors</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S3/84" definition-exists="false" ipc-concordant="G01S3/84" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/84</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with indication presented on cathode-ray tubes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S3/86" definition-exists="false" ipc-concordant="G01S3/86" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S3/86</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with means for eliminating undesired waves, e.g. disturbing noises</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G01S5/00" definition-exists="true" ipc-concordant="G01S5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Position-fixing by co-ordinating two or more direction or position line determinations</text></title-part><title-part><text>Position-fixing by co-ordinating two or more distance determinations </text><CPC-specific-text><reference><text>using active systems <class-ref scheme="cpc">G01S13/00</class-ref>, <class-ref scheme="cpc">G01S15/00</class-ref>, <class-ref scheme="cpc">G01S17/00</class-ref></text></reference></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">G01S5/00</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">G01S5/01</class-ref>, <class-ref scheme="cpc">G01S5/011</class-ref>, <class-ref scheme="cpc">G01S5/012</class-ref>, <class-ref scheme="cpc">G01S5/013</class-ref>, <class-ref scheme="cpc">G01S5/014</class-ref>, <class-ref scheme="cpc">G01S5/015</class-ref>, <class-ref scheme="cpc">G01S5/016</class-ref>, <class-ref scheme="cpc">G01S5/017</class-ref>, <class-ref scheme="cpc">G01S5/018</class-ref>, and <class-ref scheme="cpc">G01S5/019</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S5/0009" definition-exists="true" ipc-concordant="G01S5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/0009</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>Transmission of position information to remote stations </text><reference><text>involving assistance data <class-ref scheme="cpc">G01S5/0236</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/0018" definition-exists="false" ipc-concordant="G01S5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S5/0018</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Transmission from mobile station to base station</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S5/0027" definition-exists="false" ipc-concordant="G01S5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S5/0027</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of actual mobile position, i.e. position determined on mobile</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S5/0036" definition-exists="false" ipc-concordant="G01S5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S5/0036</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of measured values, i.e. measurement on mobile and position calculation on base station</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/0045" definition-exists="false" ipc-concordant="G01S5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S5/0045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Transmission from base station to mobile station </text><reference><text><class-ref scheme="cpc">G01S5/009</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S5/0054" definition-exists="false" ipc-concordant="G01S5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S5/0054</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of actual mobile position, i.e. position calculation on base station</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S5/0063" definition-exists="false" ipc-concordant="G01S5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S5/0063</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of measured values, i.e. measurement on base station and position calculation on mobile</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/0072" definition-exists="false" ipc-concordant="G01S5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S5/0072</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Transmission between mobile stations, e.g. anti-collision systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/0081" definition-exists="false" ipc-concordant="G01S5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S5/0081</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Transmission between base stations</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/009" definition-exists="false" ipc-concordant="G01S5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S5/009</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Transmission of differential positioning data to mobile</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S5/01" definition-exists="true" ipc-concordant="G01S5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/01</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>Determining conditions which influence positioning, e.g. radio environment, state of motion or energy consumption</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S5/01</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">G01S5/00</class-ref>, <class-ref scheme="cpc">G01S5/02</class-ref>, <class-ref scheme="cpc">G01S5/0205</class-ref>, <class-ref scheme="cpc">G01S19/48</class-ref>, and <class-ref scheme="cpc">G01S19/49</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/011" definition-exists="true" ipc-concordant="G01S5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/011</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>Identifying the radio environment</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S5/011</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">G01S5/00</class-ref>, <class-ref scheme="cpc">G01S5/02</class-ref>, <class-ref scheme="cpc">G01S5/0205</class-ref>, <class-ref scheme="cpc">G01S19/48</class-ref>, and <class-ref scheme="cpc">G01S19/49</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/012" definition-exists="true" ipc-concordant="G01S5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/012</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>Identifying whether indoors or outdoors</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S5/012</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">G01S5/00</class-ref>, <class-ref scheme="cpc">G01S5/02</class-ref>, <class-ref scheme="cpc">G01S5/0205</class-ref>, <class-ref scheme="cpc">G01S19/48</class-ref>, and <class-ref scheme="cpc">G01S19/49</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/013" definition-exists="true" ipc-concordant="G01S5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/013</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>Identifying areas in a building</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S5/013</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">G01S5/00</class-ref>, <class-ref scheme="cpc">G01S5/02</class-ref>, <class-ref scheme="cpc">G01S5/0205</class-ref>, <class-ref scheme="cpc">G01S19/48</class-ref>, and <class-ref scheme="cpc">G01S19/49</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/014" definition-exists="true" ipc-concordant="G01S5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/014</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>Identifying transitions between environments</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S5/014</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">G01S5/00</class-ref>, <class-ref scheme="cpc">G01S5/02</class-ref>, <class-ref scheme="cpc">G01S5/0205</class-ref>, <class-ref scheme="cpc">G01S19/48</class-ref>, and <class-ref scheme="cpc">G01S19/49</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S5/015" definition-exists="true" ipc-concordant="G01S5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/015</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>between indoor and outdoor environments</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S5/015</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">G01S5/00</class-ref>, <class-ref scheme="cpc">G01S5/02</class-ref>, <class-ref scheme="cpc">G01S5/0205</class-ref>, <class-ref scheme="cpc">G01S19/48</class-ref>, and <class-ref scheme="cpc">G01S19/49</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S5/016" definition-exists="true" ipc-concordant="G01S5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/016</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>between areas within a building</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S5/016</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">G01S5/00</class-ref>, <class-ref scheme="cpc">G01S5/02</class-ref>, <class-ref scheme="cpc">G01S5/0205</class-ref>, <class-ref scheme="cpc">G01S19/48</class-ref>, and <class-ref scheme="cpc">G01S19/49</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/017" definition-exists="true" ipc-concordant="G01S5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/017</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>Detecting state or type of motion</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S5/017</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">G01S5/00</class-ref>, <class-ref scheme="cpc">G01S5/02</class-ref>, <class-ref scheme="cpc">G01S5/0205</class-ref>, <class-ref scheme="cpc">G01S19/48</class-ref>, and <class-ref scheme="cpc">G01S19/49</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/018" definition-exists="true" ipc-concordant="G01S5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/018</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>Involving non-radio wave signals or measurements</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S5/018</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">G01S5/00</class-ref>, <class-ref scheme="cpc">G01S5/02</class-ref>, <class-ref scheme="cpc">G01S5/0205</class-ref>, <class-ref scheme="cpc">G01S19/48</class-ref>, and <class-ref scheme="cpc">G01S19/49</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/019" definition-exists="true" ipc-concordant="G01S5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/019</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>Energy consumption</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S5/019</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">G01S5/00</class-ref>, <class-ref scheme="cpc">G01S5/02</class-ref>, <class-ref scheme="cpc">G01S5/0205</class-ref>, <class-ref scheme="cpc">G01S19/48</class-ref>, and <class-ref scheme="cpc">G01S19/49</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S5/02" definition-exists="true" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/02</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>using radio waves </text><reference><text>using satellite radio beacon systems for determining position <class-ref scheme="cpc">G01S19/00</class-ref></text></reference></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">G01S5/02</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">G01S5/01</class-ref>, <class-ref scheme="cpc">G01S5/011</class-ref>, <class-ref scheme="cpc">G01S5/012</class-ref>, <class-ref scheme="cpc">G01S5/013</class-ref>, <class-ref scheme="cpc">G01S5/014</class-ref>, <class-ref scheme="cpc">G01S5/015</class-ref>, <class-ref scheme="cpc">G01S5/016</class-ref>, <class-ref scheme="cpc">G01S5/017</class-ref>, <class-ref scheme="cpc">G01S5/018</class-ref>, <class-ref scheme="cpc">G01S5/019</class-ref>, <class-ref scheme="cpc">G01S5/0244</class-ref>, <class-ref scheme="cpc">G01S5/0246</class-ref>, <class-ref scheme="cpc">G01S5/0249</class-ref>, <class-ref scheme="cpc">G01S5/02524</class-ref>, <class-ref scheme="cpc">G01S5/02525</class-ref>, <class-ref scheme="cpc">G01S5/02526</class-ref>, <class-ref scheme="cpc">G01S5/02527</class-ref>, <class-ref scheme="cpc">G01S5/02529</class-ref>, <class-ref scheme="cpc">G01S5/0269</class-ref>, <class-ref scheme="cpc">G01S5/02695</class-ref>, <class-ref scheme="cpc">G01S5/0295</class-ref>, <class-ref scheme="cpc">G01S5/02955</class-ref>, <class-ref scheme="cpc">G01S2205/01</class-ref>, <class-ref scheme="cpc">G01S2205/02</class-ref>, <class-ref scheme="cpc">G01S2205/03</class-ref>, <class-ref scheme="cpc">G01S2205/04</class-ref>, <class-ref scheme="cpc">G01S2205/05</class-ref>, <class-ref scheme="cpc">G01S2205/06</class-ref>, <class-ref scheme="cpc">G01S2205/07</class-ref>, <class-ref scheme="cpc">G01S2205/08</class-ref>, <class-ref scheme="cpc">G01S2205/09</class-ref>, and <class-ref scheme="cpc">G01S2205/10</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/0205" definition-exists="true" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/0205</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">G01S5/0205</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">G01S5/01</class-ref>, <class-ref scheme="cpc">G01S5/011</class-ref>, <class-ref scheme="cpc">G01S5/013</class-ref>, <class-ref scheme="cpc">G01S5/012</class-ref>, <class-ref scheme="cpc">G01S5/014</class-ref>, <class-ref scheme="cpc">G01S5/015</class-ref>, <class-ref scheme="cpc">G01S5/016</class-ref>, <class-ref scheme="cpc">G01S5/017</class-ref>, <class-ref scheme="cpc">G01S5/018</class-ref>, <class-ref scheme="cpc">G01S5/019</class-ref>, and <class-ref scheme="cpc">G01S5/0244</class-ref>. <br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S5/021" definition-exists="true" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S5/021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Calibration, monitoring or correction </text><reference><text><class-ref scheme="cpc">G01S5/0252</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S5/0215" definition-exists="false" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/0215</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>Interference</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">G01S5/0215</class-ref> is impacted by reclassification into group <class-ref scheme="cpc">G01S5/0218</class-ref>.<br/>Groups <class-ref scheme="cpc">G01S5/0215</class-ref> and <class-ref scheme="cpc">G01S5/0218</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S5/0218" definition-exists="true" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/0218</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>Multipath in signal reception</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S5/0218</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">G01S5/0215</class-ref>. <br/>Groups <class-ref scheme="cpc">G01S5/0215</class-ref> and <class-ref scheme="cpc">G01S5/0218</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S5/0221" definition-exists="false" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/0221</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>Receivers</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">G01S5/0221</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">G01S5/02213</class-ref> and <class-ref scheme="cpc">G01S5/02216</class-ref>.<br/>Groups <class-ref scheme="cpc">G01S5/0221</class-ref>, <class-ref scheme="cpc">G01S5/02213</class-ref>, and <class-ref scheme="cpc">G01S5/02216</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S5/02213" definition-exists="true" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/02213</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>Receivers arranged in a network for determining the position of a transmitter</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S5/02213</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">G01S5/0221</class-ref>. <br/>Groups <class-ref scheme="cpc">G01S5/0221</class-ref> and <class-ref scheme="cpc">G01S5/02213</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S5/02216" definition-exists="true" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/02216</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>Timing or synchronisation of the receivers</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S5/02216</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">G01S5/0221</class-ref>. <br/>Groups <class-ref scheme="cpc">G01S5/0221</class-ref> and <class-ref scheme="cpc">G01S5/02216</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S5/0226" definition-exists="false" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/0226</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>Transmitters</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S5/0231" definition-exists="false" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S5/0231</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Emergency, distress or locator beacons</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S5/0236" definition-exists="false" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/0236</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>Assistance data, e.g. base station almanac</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S5/0242" definition-exists="true" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/0242</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>Determining the position of transmitters to be subsequently used in positioning </text><reference><text><class-ref scheme="cpc">G01S5/0289</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">G01S5/0242</class-ref> is impacted by reclassification into group <class-ref scheme="cpc">G01S5/0249</class-ref>. <br/>Groups <class-ref scheme="cpc">G01S5/0242</class-ref> and <class-ref scheme="cpc">G01S5/0249</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S5/0244" definition-exists="true" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/0244</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>Accuracy or reliability of position solution or of measurements contributing thereto</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S5/0244</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">G01S5/02</class-ref> and <class-ref scheme="cpc">G01S5/0205</class-ref>.<br/>Groups <class-ref scheme="cpc">G01S5/02</class-ref>, <class-ref scheme="cpc">G01S5/0205</class-ref>, and <class-ref scheme="cpc">G01S5/0244</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/0246" definition-exists="true" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/0246</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>involving frequency difference of arrival or Doppler measurements </text><reference><text><class-ref scheme="cpc">G01S5/02685</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S5/0246</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">G01S5/02</class-ref>.<br/>Groups <class-ref scheme="cpc">G01S5/02</class-ref> and <class-ref scheme="cpc">G01S5/0246</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/0247" definition-exists="true" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/0247</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>Determining attitude</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/0249" definition-exists="true" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/0249</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>Determining position using measurements made by a non-stationary device other than the device whose position is being determined</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S5/0249</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">G01S5/02</class-ref> and <class-ref scheme="cpc">G01S5/0242</class-ref>. <br/>Groups <class-ref scheme="cpc">G01S5/02</class-ref>, <class-ref scheme="cpc">G01S5/0242</class-ref>, and <class-ref scheme="cpc">G01S5/0249</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/0252" definition-exists="true" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/0252</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>Radio frequency fingerprinting</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="note"><note-paragraph>In this group, the following terms are used with the meaning indicated:<subnote type="bullet"><note-paragraph> Radio frequency fingerprints mean measurements or simulated values of radio frequency signal parameters, e.g. receiver signal strength indicator [RSSI] or identifiers or access point identifiers [ApIds] combined with coordinates of the positions at which the radio frequency fingerprints were measured.</note-paragraph><note-paragraph>"Radio-map" means a collection of radio frequency fingerprints.</note-paragraph></subnote></note-paragraph></note><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">G01S5/0252</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">G01S5/02521</class-ref>, <class-ref scheme="cpc">G01S5/02522</class-ref>, <class-ref scheme="cpc">G01S5/02523</class-ref>, <class-ref scheme="cpc">G01S5/02524</class-ref>, <class-ref scheme="cpc">G01S5/02525</class-ref>, <class-ref scheme="cpc">G01S5/02526</class-ref>, <class-ref scheme="cpc">G01S5/02527</class-ref>, <class-ref scheme="cpc">G01S5/02528</class-ref>, and <class-ref scheme="cpc">G01S5/02529</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S5/02521" definition-exists="true" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/02521</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>using a radio-map</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S5/02521</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">G01S5/0252</class-ref>. <br/>Groups <class-ref scheme="cpc">G01S5/0252</class-ref> and <class-ref scheme="cpc">G01S5/02521</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S5/02522" definition-exists="true" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/02522</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>The radio-map containing measured values of non-radio values</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S5/02522</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">G01S5/0252</class-ref>. <br/>Groups <class-ref scheme="cpc">G01S5/0252</class-ref> and <class-ref scheme="cpc">G01S5/02522</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S5/02523" definition-exists="true" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/02523</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>Details of interaction of receiver with radio-map</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S5/02523</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">G01S5/0252</class-ref>. <br/>Groups <class-ref scheme="cpc">G01S5/0252</class-ref> and <class-ref scheme="cpc">G01S5/02523</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S5/02524" definition-exists="true" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/02524</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>Creating or updating the radio-map</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S5/02524</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">G01S5/02</class-ref> and <class-ref scheme="cpc">G01S5/0252</class-ref>.<br/>Groups <class-ref scheme="cpc">G01S5/02</class-ref>, <class-ref scheme="cpc">G01S5/0252</class-ref>, and <class-ref scheme="cpc">G01S5/02524</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S5/02525" definition-exists="true" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/02525</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>Gathering the radio frequency fingerprints</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S5/02525</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">G01S5/02</class-ref> and <class-ref scheme="cpc">G01S5/0252</class-ref>. <br/>Groups <class-ref scheme="cpc">G01S5/02</class-ref>, <class-ref scheme="cpc">G01S5/0252</class-ref>, and <class-ref scheme="cpc">G01S5/02525</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S5/02526" definition-exists="false" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/02526</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>using non-dedicated equipment, e.g. user equipment or crowd-sourcing</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S5/02526</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">G01S5/02</class-ref> and <class-ref scheme="cpc">G01S5/0252</class-ref>.<br/>Groups <class-ref scheme="cpc">G01S5/02</class-ref>, <class-ref scheme="cpc">G01S5/0252</class-ref>, and <class-ref scheme="cpc">G01S5/02526</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S5/02527" definition-exists="true" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/02527</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>Detecting or resolving anomalies in the radio frequency fingerprints of the radio-map</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S5/02527</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">G01S5/02</class-ref> and <class-ref scheme="cpc">G01S5/0252</class-ref>.<br/>Groups <class-ref scheme="cpc">G01S5/02</class-ref>, <class-ref scheme="cpc">G01S5/0252</class-ref>, and <class-ref scheme="cpc">G01S5/02527</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S5/02528" definition-exists="true" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/02528</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>Simulating radio frequency fingerprints</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S5/02528</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">G01S5/0252</class-ref>. <br/>Groups <class-ref scheme="cpc">G01S5/0252</class-ref> and <class-ref scheme="cpc">G01S5/02528</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S5/02529" definition-exists="true" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/02529</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>not involving signal parameters, i.e. only involving identifiers</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S5/02529</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">G01S5/02</class-ref> and <class-ref scheme="cpc">G01S5/0252</class-ref>. <br/>Groups <class-ref scheme="cpc">G01S5/02</class-ref>, <class-ref scheme="cpc">G01S5/0252</class-ref>, and <class-ref scheme="cpc">G01S5/02529</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/0257" definition-exists="true" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/0257</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>Hybrid positioning </text><reference><text>by coordinating position lines of different shape <class-ref scheme="cpc">G01S5/12</class-ref></text></reference></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">G01S5/0257</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">G01S5/0258</class-ref> and <class-ref scheme="cpc">G01S5/02585</class-ref>.<br/>Groups <class-ref scheme="cpc">G01S5/0257</class-ref>, <class-ref scheme="cpc">G01S5/0258</class-ref>, and <class-ref scheme="cpc">G01S5/02585</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S5/0258" definition-exists="true" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/0258</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>by combining or switching between measurements derived from different systems</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S5/0258</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">G01S5/0257</class-ref>.<br/>Groups <class-ref scheme="cpc">G01S5/0257</class-ref> and <class-ref scheme="cpc">G01S5/0258</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S5/02585" definition-exists="true" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/02585</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>at least one of the measurements being a non-radio measurement</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S5/02585</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">G01S5/0257</class-ref>. <br/>Groups <class-ref scheme="cpc">G01S5/0257</class-ref> and <class-ref scheme="cpc">G01S5/02585</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S5/0263" definition-exists="true" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/0263</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>by combining or switching between positions derived from two or more separate positioning systems</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">G01S5/0263</class-ref> is impacted by reclassification into group <class-ref scheme="cpc">G01S5/0264</class-ref>. <br/>Groups <class-ref scheme="cpc">G01S5/0263</class-ref> and <class-ref scheme="cpc">G01S5/0264</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S5/0264" definition-exists="true" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/0264</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>at least one of the systems being a non-radio wave positioning system</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S5/0264</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">G01S5/0263</class-ref>.<br/>Groups <class-ref scheme="cpc">G01S5/0263</class-ref> and <class-ref scheme="cpc">G01S5/0264</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S5/0268" definition-exists="true" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/0268</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>by deriving positions from different combinations of signals or of estimated positions in a single positioning system</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">G01S5/0268</class-ref> is impacted by reclassification into group <class-ref scheme="cpc">G01S5/02685</class-ref>. <br/>Groups <class-ref scheme="cpc">G01S5/0268</class-ref> and <class-ref scheme="cpc">G01S5/02685</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S5/02685" definition-exists="false" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/02685</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>involving dead reckoning based on radio wave measurements</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S5/02685</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">G01S5/0268</class-ref>. <br/>Groups <class-ref scheme="cpc">G01S5/0268</class-ref> and <class-ref scheme="cpc">G01S5/02685</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/0269" definition-exists="true" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/0269</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>Inferred or constrained positioning, e.g. employing knowledge of the physical or electromagnetic environment, state of motion or other contextual information to infer or constrain a position</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S5/0269</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">G01S5/02</class-ref>.<br/>Groups <class-ref scheme="cpc">G01S5/02</class-ref> and <class-ref scheme="cpc">G01S5/0269</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S5/02695" definition-exists="true" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/02695</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>Constraining the position to lie on a curve or surface</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S5/02695</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">G01S5/02</class-ref>. <br/>Groups <class-ref scheme="cpc">G01S5/02</class-ref> and <class-ref scheme="cpc">G01S5/02695</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/0273" definition-exists="false" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S5/0273</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using multipath or indirect path propagation signals in position determination</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/0278" definition-exists="true" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S5/0278</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving statistical or probabilistic considerations </text><reference><text><class-ref scheme="cpc">G01S5/0252</class-ref>, <class-ref scheme="cpc">G01S5/0294</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/0284" definition-exists="false" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S5/0284</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Relative positioning</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S5/0289" definition-exists="false" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S5/0289</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of multiple transceivers, e.g. in ad hoc networks</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/0294" definition-exists="true" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/0294</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>Trajectory determination or predictive filtering, e.g. target tracking or Kalman filtering</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/0295" definition-exists="true" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/0295</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>Proximity-based methods, e.g. position inferred from reception of particular signals</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S5/0295</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">G01S5/02</class-ref>.<br/>Groups <class-ref scheme="cpc">G01S5/02</class-ref> and <class-ref scheme="cpc">G01S5/0295</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S5/02955" definition-exists="false" ipc-concordant="G01S5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S5/02955</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>by computing a weighted average of the positions of the signal transmitters</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S5/02955</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">G01S5/02</class-ref>.<br/>Groups <class-ref scheme="cpc">G01S5/02</class-ref> and <class-ref scheme="cpc">G01S5/02955</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/04" definition-exists="false" ipc-concordant="G01S5/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S5/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Position of source determined by a plurality of spaced direction-finders</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/06" definition-exists="true" ipc-concordant="G01S5/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S5/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Position of source determined by co-ordinating a plurality of position lines defined by path-difference measurements </text><reference><text><class-ref scheme="cpc">G01S5/12</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/08" definition-exists="false" ipc-concordant="G01S5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S5/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Position of single direction-finder fixed by determining direction of a plurality of spaced sources of known location</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/10" definition-exists="true" ipc-concordant="G01S5/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G01S5/10</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Position of receiver fixed by co-ordinating a plurality of position lines defined by path-difference measurements </text><CPC-specific-text><text>, e.g. omega or decca systems</text></CPC-specific-text><reference><text><class-ref scheme="cpc">G01S5/12</class-ref> takes precedence </text><CPC-specific-text><text>; beacons and receivers cooperating therewith <class-ref scheme="cpc">G01S1/306</class-ref>, <class-ref scheme="cpc">G01S1/308</class-ref></text></CPC-specific-text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/12" definition-exists="true" ipc-concordant="G01S5/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S5/12</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>by co-ordinating position lines of different shape, e.g. hyperbolic, circular, elliptical or radial</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/14" definition-exists="false" ipc-concordant="G01S5/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S5/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Determining absolute distances from a plurality of spaced points of known location</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S5/145" definition-exists="false" ipc-concordant="G01S5/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S5/145</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Using a supplementary range measurement, e.g. based on pseudo-range measurements</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S5/16" definition-exists="true" ipc-concordant="G01S5/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S5/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using electromagnetic waves other than radio waves</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/163" definition-exists="true" ipc-concordant="G01S5/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S5/163</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Determination of attitude </text><reference><text>using inertial means <class-ref scheme="cpc">G01C9/00</class-ref>; control of attitude <class-ref scheme="cpc">G05D1/08</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/166" definition-exists="false" ipc-concordant="G01S5/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S5/166</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using gamma or X-rays</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S5/18" definition-exists="true" ipc-concordant="G01S5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S5/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using ultrasonic, sonic, or infrasonic waves</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/183" definition-exists="false" ipc-concordant="G01S5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S5/183</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Emergency, distress or locator beacons</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/186" definition-exists="true" ipc-concordant="G01S5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S5/186</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Determination of attitude </text><reference><text>using inertial means <class-ref scheme="cpc">G01C9/00</class-ref>; control of attitude <class-ref scheme="cpc">G05D1/08</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/20" definition-exists="false" ipc-concordant="G01S5/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S5/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Position of source determined by a plurality of spaced direction-finders</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/22" definition-exists="false" ipc-concordant="G01S5/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S5/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Position of source determined by co-ordinating a plurality of position lines defined by path-difference measurements </text><reference><text><class-ref scheme="cpc">G01S5/28</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/24" definition-exists="false" ipc-concordant="G01S5/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S5/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Position of single direction-finder fixed by determining direction of a plurality of spaced sources of known location</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/26" definition-exists="false" ipc-concordant="G01S5/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S5/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Position of receiver fixed by co-ordinating a plurality of position lines defined by path-difference measurements </text><reference><text><class-ref scheme="cpc">G01S5/28</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/28" definition-exists="true" ipc-concordant="G01S5/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S5/28</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>by co-ordinating position lines of different shape, e.g. hyperbolic, circular, elliptical or radial</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S5/30" definition-exists="false" ipc-concordant="G01S5/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S5/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Determining absolute distances from a plurality of spaced points of known location</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G01S7/00" definition-exists="true" ipc-concordant="G01S7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S7/00</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Details of systems according to groups <class-ref scheme="cpc">G01S13/00</class-ref>, <class-ref scheme="cpc">G01S15/00</class-ref>, <class-ref scheme="cpc">G01S17/00</class-ref></text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S7/003" definition-exists="true" ipc-concordant="G01S7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S7/003</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Transmission of data between radar, sonar or lidar systems and remote stations</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S7/006" definition-exists="true" ipc-concordant="G01S7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using shared front-end circuitry, e.g. antennas </text><reference><text><class-ref scheme="cpc">G01S13/765</class-ref>, <class-ref scheme="cpc">G01S13/825</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S7/02" definition-exists="true" ipc-concordant="G01S7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of systems according to group <class-ref scheme="cpc">G01S13/00</class-ref></text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S7/021" definition-exists="true" ipc-concordant="G01S7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S7/021</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Auxiliary means for detecting or identifying radar signals or the like, e.g. radar jamming signals</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/022" definition-exists="true" ipc-concordant="G01S7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Road traffic radar detectors</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S7/023" definition-exists="false" ipc-concordant="G01S7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>G01S7/023</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>Interference mitigation, e.g. reducing or avoiding non-intentional interference with other HF-transmitters, base station transmitters for mobile communication or other radar systems, e.g. using electro-magnetic interference [EMI] reduction techniques </text><reference><text>auxiliary means for detecting or identifying radar signals or the like <class-ref scheme="cpc">G01S7/021</class-ref>; means for anti-jamming <class-ref scheme="cpc">G01S7/36</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/0231" definition-exists="false" ipc-concordant="G01S7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>G01S7/0231</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>Avoidance by polarisation multiplex</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/0232" definition-exists="false" ipc-concordant="G01S7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>G01S7/0232</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>Avoidance by frequency multiplex</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/0233" definition-exists="false" ipc-concordant="G01S7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>G01S7/0233</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>Avoidance by phase multiplex</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/0234" definition-exists="false" ipc-concordant="G01S7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>G01S7/0234</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>Avoidance by code multiplex</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/0235" definition-exists="false" ipc-concordant="G01S7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>G01S7/0235</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>Avoidance by time multiplex</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/0236" definition-exists="false" ipc-concordant="G01S7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-08-01" status="published"><classification-symbol>G01S7/0236</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>Avoidance by space multiplex</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S7/024" definition-exists="false" ipc-concordant="G01S7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/024</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using polarisation effects </text><reference><text>in waveguides <class-ref scheme="cpc">H01P1/165</class-ref>; for aerials <class-ref scheme="cpc">H01Q</class-ref>, e.g. <class-ref scheme="cpc">H01Q15/22</class-ref>, <class-ref scheme="cpc">H01Q15/24</class-ref>, <class-ref scheme="cpc">H01Q19/195</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/025" definition-exists="false" ipc-concordant="G01S7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving the transmission of linearly polarised waves</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/026" definition-exists="false" ipc-concordant="G01S7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving the transmission of elliptically or circularly polarised waves</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S7/027" definition-exists="false" ipc-concordant="G01S7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G01S7/027</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>Constructional details of housings, e.g. form, type, material or ruggedness</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/028" definition-exists="false" ipc-concordant="G01S7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G01S7/028</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>Miniaturisation, e.g. surface mounted device [SMD] packaging or housings</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S7/03" definition-exists="true" ipc-concordant="G01S7/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S7/03</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/032" definition-exists="true" ipc-concordant="G01S7/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/032</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Constructional details for solid-state radar subsystems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/034" definition-exists="false" ipc-concordant="G01S7/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/034</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Duplexers </text><reference><text>switching devices for waveguides <class-ref scheme="cpc">H01P1/10</class-ref>; transmit-receive switching in transceivers <class-ref scheme="cpc">H04B1/44</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/036" definition-exists="true" ipc-concordant="G01S7/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S7/036</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>involving a transfer mixer</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/038" definition-exists="true" ipc-concordant="G01S7/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/038</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Feedthrough nulling circuits</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S7/04" definition-exists="true" ipc-concordant="G01S7/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Display arrangements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/043" definition-exists="false" ipc-concordant="G01S7/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/043</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Synchronising the display device with the scanning of the antenna</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/046" definition-exists="true" ipc-concordant="G01S7/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S7/046</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>using an intermediate storage device, e.g. a recording/reproducing device</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/06" definition-exists="true" ipc-concordant="G01S7/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S7/06</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Cathode-ray tube displays </text><CPC-specific-text><text>or other two dimensional or three-dimensional displays</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/062" definition-exists="false" ipc-concordant="G01S7/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/062</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which different colours are used</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/064" definition-exists="false" ipc-concordant="G01S7/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/064</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a display memory for image processing </text><reference><text><class-ref scheme="cpc">G01S7/298</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/066" definition-exists="false" ipc-concordant="G01S7/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with means for showing the history of the radar trails, e.g. artificial remanence</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/068" definition-exists="false" ipc-concordant="G01S7/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-05-01" status="published"><classification-symbol>G01S7/068</classification-symbol><class-title date-revised="2017-05-01"><title-part><CPC-specific-text><text>with data-rate converters preceding the display, e.g. flicker free display, constant brightness display </text><reference><text><class-ref scheme="cpc">G01S7/298</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/08" definition-exists="false" ipc-concordant="G01S7/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with vernier indication of distance, e.g. using two cathode-ray tubes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/10" definition-exists="false" ipc-concordant="G01S7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S7/10</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Providing two-dimensional and co-ordinated display of distance and direction</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/12" definition-exists="false" ipc-concordant="G01S7/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Plan-position indicators, i.e. P.P.I.</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S7/14" definition-exists="false" ipc-concordant="G01S7/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sector, off-centre, or expanded angle display</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/16" definition-exists="false" ipc-concordant="G01S7/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Signals displayed as intensity modulation with rectangular co-ordinates representing distance and bearing, e.g. type B</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/18" definition-exists="false" ipc-concordant="G01S7/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Distance-height displays</text></title-part><title-part><text>Distance-elevation displays, e.g. type RHI, type E</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/20" definition-exists="false" ipc-concordant="G01S7/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S7/20</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Stereoscopic displays</text></title-part><title-part><text>Three-dimensional displays</text></title-part><title-part><text>Pseudo-three-dimensional displays</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/22" definition-exists="false" ipc-concordant="G01S7/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S7/22</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Producing cursor lines and indicia by electronic means</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/24" definition-exists="false" ipc-concordant="G01S7/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the display being orientated or displaced in accordance with movement of object carrying the transmitting and receiving apparatus, e.g. true-motion radar</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S7/28" definition-exists="true" ipc-concordant="G01S7/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details of pulse systems</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/2806" definition-exists="false" ipc-concordant="G01S7/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/2806</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Employing storage or delay devices which preserve the pulse form of the echo signal, e.g. for comparing and combining echoes received during different periods</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/2813" definition-exists="true" ipc-concordant="G01S7/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/2813</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means providing a modification of the radiation pattern for cancelling noise, clutter or interfering signals, e.g. side lobe suppression, side lobe blanking, null-steering arrays </text><reference><text>specially adapted to secondary radar systems <class-ref scheme="cpc">G01S13/762</class-ref>; aerials or aerials systems <class-ref scheme="cpc">H01Q21/29</class-ref>, <class-ref scheme="cpc">H01Q25/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/282" definition-exists="true" ipc-concordant="G01S7/282" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/282</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Transmitters</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/285" definition-exists="false" ipc-concordant="G01S7/285" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/285</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Receivers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/288" definition-exists="false" ipc-concordant="G01S7/288" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/288</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Coherent receivers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/2883" definition-exists="false" ipc-concordant="G01S7/288" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G01S7/2883</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>using FFT processing</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/2886" definition-exists="false" ipc-concordant="G01S7/288" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G01S7/2886</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>using I/Q processing</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/292" definition-exists="true" ipc-concordant="G01S7/292" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S7/292</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Extracting wanted echo-signals</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/2921" definition-exists="true" ipc-concordant="G01S7/292" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/2921</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on data belonging to one radar period</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S7/2922" definition-exists="true" ipc-concordant="G01S7/292" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/2922</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by using a controlled threshold</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/2923" definition-exists="false" ipc-concordant="G01S7/292" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/2923</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on data belonging to a number of consecutive radar periods</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S7/2925" definition-exists="true" ipc-concordant="G01S7/292" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/2925</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by using shape of radiation pattern</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S7/2926" definition-exists="false" ipc-concordant="G01S7/292" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/2926</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by integration</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S7/2927" definition-exists="true" ipc-concordant="G01S7/292" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/2927</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by deriving and controlling a threshold value</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S7/2928" definition-exists="false" ipc-concordant="G01S7/292" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/2928</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Random or non-synchronous interference pulse cancellers</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/295" definition-exists="true" ipc-concordant="G01S7/295" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/295</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for transforming co-ordinates or for evaluating data, e.g. using computers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/2955" definition-exists="false" ipc-concordant="G01S7/295" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G01S7/2955</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>Means for determining the position of the radar coordinate system for evaluating the position data of the target in another coordinate system </text><reference><text><class-ref scheme="cpc">G01S7/24</class-ref> takes precedence; sighting devices adapted for indirect laying of fire <class-ref scheme="cpc">F41G3/16</class-ref>; inertial navigation <class-ref scheme="cpc">G01C21/16</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/298" definition-exists="true" ipc-concordant="G01S7/298" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/298</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Scan converters</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/32" definition-exists="false" ipc-concordant="G01S7/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Shaping echo pulse signals</text></title-part><title-part><text>Deriving non-pulse signals from echo pulse signals</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/34" definition-exists="true" ipc-concordant="G01S7/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Gain of receiver varied automatically during pulse-recurrence period, e.g. anti-clutter gain control</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S7/35" definition-exists="true" ipc-concordant="G01S7/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/35</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details of non-pulse systems</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/352" definition-exists="false" ipc-concordant="G01S7/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/352</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Receivers</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/354" definition-exists="false" ipc-concordant="G01S7/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/354</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Extracting wanted echo-signals </text><reference><text>Doppler systems <class-ref scheme="cpc">G01S13/50</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/356" definition-exists="false" ipc-concordant="G01S7/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G01S7/356</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>involving particularities of FFT processing</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/358" definition-exists="false" ipc-concordant="G01S7/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G01S7/358</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>using I/Q processing</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S7/36" definition-exists="true" ipc-concordant="G01S7/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S7/36</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Means for anti-jamming </text><CPC-specific-text><text>, e.g. ECCM, i.e. electronic counter-counter measures</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S7/38" definition-exists="true" ipc-concordant="G01S7/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S7/38</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Jamming means, e.g. producing false echoes</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S7/40" definition-exists="true" ipc-concordant="G01S7/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for monitoring or calibrating</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/4004" definition-exists="true" ipc-concordant="G01S7/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S7/4004</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>of parts of a radar system</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/4008" definition-exists="true" ipc-concordant="G01S7/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/4008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of transmitters</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/4013" definition-exists="false" ipc-concordant="G01S7/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G01S7/4013</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>involving adjustment of the transmitted power</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/4017" definition-exists="true" ipc-concordant="G01S7/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/4017</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of HF systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/4021" definition-exists="true" ipc-concordant="G01S7/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/4021</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of receivers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/4026" definition-exists="true" ipc-concordant="G01S7/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/4026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Antenna boresight</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/403" definition-exists="false" ipc-concordant="G01S7/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G01S7/403</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>in azimuth, i.e. in the horizontal plane</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/4034" definition-exists="false" ipc-concordant="G01S7/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G01S7/4034</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>in elevation, i.e. in the vertical plane</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/4039" definition-exists="false" ipc-concordant="G01S7/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G01S7/4039</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>of sensor or antenna obstruction, e.g. dirt- or ice-coating</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/4043" definition-exists="false" ipc-concordant="G01S7/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G01S7/4043</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>including means to prevent or remove the obstruction</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S7/4047" definition-exists="false" ipc-concordant="G01S7/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G01S7/4047</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>Heated dielectric lens, e.g. by heated wire</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/4052" definition-exists="true" ipc-concordant="G01S7/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S7/4052</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>by simulation of echoes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/4056" definition-exists="true" ipc-concordant="G01S7/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/4056</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>specially adapted to FMCW</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/406" definition-exists="false" ipc-concordant="G01S7/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G01S7/406</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>using internally generated reference signals, e.g. via delay line, via RF or IF signal injection or via integrated reference reflector or transponder</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/4065" definition-exists="false" ipc-concordant="G01S7/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G01S7/4065</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>involving a delay line</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/4069" definition-exists="false" ipc-concordant="G01S7/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G01S7/4069</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>involving a RF signal injection</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/4073" definition-exists="false" ipc-concordant="G01S7/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G01S7/4073</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>involving an IF signal injection</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/4078" definition-exists="false" ipc-concordant="G01S7/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G01S7/4078</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>involving an integrated reference reflector or reference transponder</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/4082" definition-exists="false" ipc-concordant="G01S7/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G01S7/4082</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>using externally generated reference signals, e.g. via remote reflector or transponder</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/4086" definition-exists="false" ipc-concordant="G01S7/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G01S7/4086</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>in a calibrating environment, e.g. anechoic chamber</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/4091" definition-exists="false" ipc-concordant="G01S7/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G01S7/4091</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>during normal radar operation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/4095" definition-exists="false" ipc-concordant="G01S7/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-05-01" status="published"><classification-symbol>G01S7/4095</classification-symbol><class-title date-revised="2021-05-01"><title-part><CPC-specific-text><text>the external reference signals being modulated, e.g. rotating a dihedral reflector or modulating a transponder for simulation of a Doppler echo</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S7/41" definition-exists="false" ipc-concordant="G01S7/41" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/41</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using analysis of echo signal for target characterisation</text></title-part><title-part><text>Target signature</text></title-part><title-part><text>Target cross-section</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/411" definition-exists="false" ipc-concordant="G01S7/41" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/411</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Identification of targets based on measurements of radar reflectivity </text><reference><text><class-ref scheme="cpc">G01S7/415</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/412" definition-exists="false" ipc-concordant="G01S7/41" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/412</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>based on a comparison between measured values and known or stored values</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/414" definition-exists="true" ipc-concordant="G01S7/41" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/414</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Discriminating targets with respect to background clutter</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/415" definition-exists="true" ipc-concordant="G01S7/41" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/415</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Identification of targets based on measurements of movement associated with the target</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/417" definition-exists="false" ipc-concordant="G01S7/41" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/417</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving the use of neural networks</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/418" definition-exists="true" ipc-concordant="G01S7/41" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/418</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Theoretical aspects</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S7/42" definition-exists="true" ipc-concordant="G01S7/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Diversity systems specially adapted for radar</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S7/48" definition-exists="true" ipc-concordant="G01S7/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of systems according to group <class-ref scheme="cpc">G01S17/00</class-ref></text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S7/4802" definition-exists="false" ipc-concordant="G01S7/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/4802</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using analysis of echo signal for target characterisation; Target signature; Target cross-section</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S7/4804" definition-exists="true" ipc-concordant="G01S7/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/4804</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Auxiliary means for detecting or identifying lidar signals or the like, e.g. laser illuminators</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/4806" definition-exists="true" ipc-concordant="G01S7/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/4806</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Road traffic laser detectors</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S7/4808" definition-exists="false" ipc-concordant="G01S7/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/4808</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Evaluating distance, position or velocity data</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S7/481" definition-exists="true" ipc-concordant="G01S7/481" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/481</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Constructional features, e.g. arrangements of optical elements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/4811" definition-exists="true" ipc-concordant="G01S7/481" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/4811</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>common to transmitter and receiver</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/4812" definition-exists="true" ipc-concordant="G01S7/481" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/4812</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>transmitted and received beams following a coaxial path</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/4813" definition-exists="true" ipc-concordant="G01S7/481" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/4813</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Housing arrangements</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/4814" definition-exists="true" ipc-concordant="G01S7/481" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/4814</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of transmitters alone</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/4815" definition-exists="false" ipc-concordant="G01S7/481" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/4815</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using multiple transmitters</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/4816" definition-exists="true" ipc-concordant="G01S7/481" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/4816</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of receivers alone</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/4817" definition-exists="false" ipc-concordant="G01S7/481" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/4817</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>relating to scanning</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/4818" definition-exists="true" ipc-concordant="G01S7/481" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/4818</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using optical fibres</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S7/483" definition-exists="true" ipc-concordant="G01S7/483" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/483</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details of pulse systems</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/484" definition-exists="true" ipc-concordant="G01S7/484" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/484</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Transmitters</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/486" definition-exists="true" ipc-concordant="G01S7/486" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/486</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Receivers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/4861" definition-exists="true" ipc-concordant="G01S7/4861" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S7/4861</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Circuits for detection, sampling, integration or read-out</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/4863" definition-exists="true" ipc-concordant="G01S7/4863" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S7/4863</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Detector arrays, e.g. charge-transfer gates</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/4865" definition-exists="true" ipc-concordant="G01S7/4865" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S7/4865</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Time delay measurement, e.g. time-of-flight measurement, time of arrival measurement or determining the exact position of a peak </text><reference><text>peak detection in noise, signal conditioning <class-ref scheme="cpc">G01S7/487</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/4866" definition-exists="false" ipc-concordant="G01S7/4865" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S7/4866</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by fitting a model or function to the received signal</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/4868" definition-exists="false" ipc-concordant="G01S7/486" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/4868</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Controlling received signal intensity or exposure of sensor</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/487" definition-exists="true" ipc-concordant="G01S7/487" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G01S7/487</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>Extracting wanted echo signals </text><CPC-specific-text><text>, e.g. pulse detection</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/4873" definition-exists="false" ipc-concordant="G01S7/487" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/4873</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by deriving and controlling a threshold value</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/4876" definition-exists="false" ipc-concordant="G01S7/487" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/4876</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by removing unwanted signals </text><reference><text><class-ref scheme="cpc">G01S7/495</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/489" definition-exists="true" ipc-concordant="G01S7/489" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/489</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Gain of receiver varied automatically during pulse-recurrence period</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S7/491" definition-exists="true" ipc-concordant="G01S7/491" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/491</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details of non-pulse systems</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/4911" definition-exists="true" ipc-concordant="G01S7/4911" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S7/4911</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Transmitters</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/4912" definition-exists="true" ipc-concordant="G01S7/4912" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S7/4912</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Receivers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/4913" definition-exists="true" ipc-concordant="G01S7/4913" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S7/4913</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Circuits for detection, sampling, integration or read-out</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/4914" definition-exists="true" ipc-concordant="G01S7/4914" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S7/4914</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>of detector arrays, e.g. charge-transfer gates</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/4915" definition-exists="true" ipc-concordant="G01S7/4915" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S7/4915</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Time delay measurement, e.g. operational details for pixel components </text><reference><text>signal extraction and conditioning <class-ref scheme="cpc">G01S7/493</class-ref></text></reference></title-part><title-part><text>Phase measurement</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/4916" definition-exists="false" ipc-concordant="G01S7/4912" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S7/4916</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using self-mixing in the laser cavity</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/4917" definition-exists="false" ipc-concordant="G01S7/4912" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S7/4917</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>superposing optical signals in a photodetector, e.g. optical heterodyne detection</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/4918" definition-exists="false" ipc-concordant="G01S7/4912" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S7/4918</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Controlling received signal intensity, gain or exposure of sensor</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/493" definition-exists="true" ipc-concordant="G01S7/493" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/493</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Extracting wanted echo signals</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S7/495" definition-exists="true" ipc-concordant="G01S7/495" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/495</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Counter-measures or counter-counter-measures </text><CPC-specific-text><text>using electronic or electro-optical means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S7/497" definition-exists="true" ipc-concordant="G01S7/497" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/497</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for monitoring or calibrating</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/4972" definition-exists="true" ipc-concordant="G01S7/497" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/4972</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Alignment of sensor</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G01S7/4975" definition-exists="false" ipc-concordant="G01S7/497" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G01S2007/4975</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>of sensor obstruction by, e.g. dirt- or ice-coating, e.g. by reflection measurement on front-screen</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G01S7/4977" definition-exists="false" ipc-concordant="G01S7/497" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S2007/4977</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>including means to prevent or remove the obstruction</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S7/499" definition-exists="true" ipc-concordant="G01S7/499" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S7/499</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>using polarisation effects</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S7/51" definition-exists="true" ipc-concordant="G01S7/51" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/51</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Display arrangements</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S7/52" definition-exists="true" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of systems according to group <class-ref scheme="cpc">G01S15/00</class-ref></text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S7/52001" definition-exists="true" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S7/52001</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Auxiliary means for detecting or identifying sonar signals or the like, e.g. sonar jamming signals</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S7/52003" definition-exists="true" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S7/52003</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Techniques for enhancing spatial resolution of targets </text><reference><text><class-ref scheme="cpc">G01S7/52046</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S7/52004" definition-exists="true" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52004</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for monitoring or calibrating </text><reference><text>short-range imaging <class-ref scheme="cpc">G01S7/5205</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/52006" definition-exists="true" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with provision for compensating the effects of temperature</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G01S7/52007" definition-exists="false" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S2007/52007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving adjustment of transmitted power</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G01S7/52009" definition-exists="false" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S2007/52009</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>of sensor obstruction, e.g. dirt- or ice-coating</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G01S7/52011" definition-exists="false" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S2007/52011</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>including means to prevent or remove the obstruction</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G01S7/52012" definition-exists="false" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S2007/52012</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving a reference ground return</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G01S7/52014" definition-exists="false" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S2007/52014</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving a reference reflector integrated in the sensor or transducer configuration</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S7/52015" definition-exists="true" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52015</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Diversity systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S7/52017" definition-exists="true" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52017</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>particularly adapted to short-range imaging </text><reference><text><class-ref scheme="cpc">G01S7/53</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/52019" definition-exists="false" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52019</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details of transmitters</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/5202" definition-exists="false" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/5202</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for pulse systems</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/52022" definition-exists="false" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a sequence of pulses, at least one pulse manipulating the transmissivity or reflexivity of the medium</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/52023" definition-exists="false" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details of receivers</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/52025" definition-exists="true" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for pulse systems </text><reference><text><class-ref scheme="cpc">G01S7/52034</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/52026" definition-exists="true" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Extracting wanted echo signals </text><reference><text>Doppler systems <class-ref scheme="cpc">G01S15/50</class-ref>; Doppler short range imaging systems <class-ref scheme="cpc">G01S15/8979</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S7/52028" definition-exists="true" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using digital techniques</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/5203" definition-exists="true" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/5203</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for non-pulse systems, e.g. CW systems </text><reference><text><class-ref scheme="cpc">G01S7/52034</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/52031" definition-exists="false" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52031</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Extracting wanted echo signals</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/52033" definition-exists="true" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52033</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Gain control of receivers </text><reference><text>for seismic signals <class-ref scheme="cpc">G01V1/245</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/52034" definition-exists="true" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52034</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Data rate converters</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/52036" definition-exists="true" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52036</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using analysis of echo signal for target characterisation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/52038" definition-exists="true" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52038</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving non-linear properties of the propagation medium or of the reflective target</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S7/52039" definition-exists="false" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G01S7/52039</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>exploiting the non-linear response of a contrast enhancer, e.g. a contrast agent </text><reference><text>diagnostic techniques involving the use of contrast agents <class-ref scheme="cpc">A61B8/481</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S7/52041" definition-exists="false" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52041</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>detecting modification of a contrast enhancer, e.g. detecting the destruction of a contrast agent by an acoustic wave, e.g. loss of correlation </text><reference><text>diagnostic techniques involving the use of contrast agents <class-ref scheme="cpc">A61B8/481</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/52042" definition-exists="false" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>determining elastic properties of the propagation medium or of the reflective target </text><reference><text>diagnostic techniques involving the measurement of strain <class-ref scheme="cpc">A61B8/485</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/52044" definition-exists="false" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52044</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Scan converters</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/52046" definition-exists="true" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52046</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Techniques for image enhancement involving transmitter or receiver </text><reference><text>image enhancement by image data processing <class-ref scheme="cpc">G06T5/00</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/52047" definition-exists="true" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S7/52047</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>for elimination of side lobes or of grating lobes; for increasing resolving power</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/52049" definition-exists="true" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52049</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using correction of medium-induced phase aberration</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/5205" definition-exists="true" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/5205</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Means for monitoring or calibrating</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/52052" definition-exists="true" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52052</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with simulation of echoes</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/52053" definition-exists="true" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52053</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Display arrangements</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/52055" definition-exists="true" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52055</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in association with ancillary recording equipment</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/52057" definition-exists="true" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S7/52057</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>Cathode ray tube displays</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/52058" definition-exists="false" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52058</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>displaying one measured variable; A-scan display</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/5206" definition-exists="true" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/5206</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Two-dimensional coordinated display of distance and direction; B-scan display</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S7/52061" definition-exists="true" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52061</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Plan position indication (PPI display); C-scan display</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S7/52063" definition-exists="true" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52063</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Sector scan display</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S7/52065" definition-exists="true" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Compound scan display, e.g. panoramic imaging</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S7/52066" definition-exists="true" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Time-position or time-motion displays</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/52068" definition-exists="true" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52068</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Stereoscopic displays; Three-dimensional displays; Pseudo 3D displays </text><reference><text><class-ref scheme="cpc">G01S15/8993</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S7/52069" definition-exists="false" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52069</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Grey-scale displays</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/52071" definition-exists="true" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52071</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multicolour displays; using colour coding; Optimising colour or information content in displays, e.g. parametric imaging</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/52073" definition-exists="true" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52073</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Production of cursor lines, markers or indicia by electronic means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/52074" definition-exists="true" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52074</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Composite displays, e.g. split-screen displays; Combination of multiple images or of images and alphanumeric tabular information</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/52076" definition-exists="true" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52076</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Luminous indicators</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/52077" definition-exists="true" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52077</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with means for elimination of unwanted signals, e.g. noise or interference</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/52079" definition-exists="false" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52079</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Constructional features </text><reference><text>constructional features of transducers <class-ref scheme="cpc">B06B</class-ref>; mounting transducers <class-ref scheme="cpc">G10K11/00</class-ref>; constructional features of ultrasonic medical diagnostic devices <class-ref scheme="cpc">A61B8/44</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/5208" definition-exists="false" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/5208</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with integration of processing functions inside probe or scanhead</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/52082" definition-exists="false" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52082</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving a modular construction, e.g. a computer with short range imaging equipment </text><reference><text>modular ultrasonic medical diagnostic devices <class-ref scheme="cpc">A61B8/4411</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/52084" definition-exists="false" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52084</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>related to particular user interfaces </text><reference><text>special user input means for ultrasonic medical diagnostic devices <class-ref scheme="cpc">A61B8/467</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/52085" definition-exists="false" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Details related to the ultrasound signal acquisition, e.g. scan sequences </text><reference><text>control of medical diagnostic ultrasound devices <class-ref scheme="cpc">A61B8/54</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/52087" definition-exists="false" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52087</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using synchronization techniques </text><reference><text>control of medical diagnostic ultrasound devices involving acquisition triggered by a physiological signal <class-ref scheme="cpc">A61B8/543</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/52088" definition-exists="false" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52088</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving retrospective scan line rearrangements </text><reference><text>medical diagnostic ultrasound devices involving retrospective matching to a physiological signal <class-ref scheme="cpc">A61B8/5284</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/5209" definition-exists="false" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/5209</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using multibeam transmission</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/52092" definition-exists="false" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52092</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using frequency diversity</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/52093" definition-exists="false" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52093</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using coded signals </text><reference><text><class-ref scheme="cpc">G01S15/8959</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/52095" definition-exists="false" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52095</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using multiline receive beamforming</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/52096" definition-exists="false" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52096</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>related to power management, e.g. saving power or prolonging life of electronic components </text><reference><text>details of power supplies for ultrasonic medical diagnostic imaging devices <class-ref scheme="cpc">A61B8/56</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/52098" definition-exists="false" ipc-concordant="G01S7/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/52098</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>related to workflow protocols</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S7/521" definition-exists="true" ipc-concordant="G01S7/521" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S7/521</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Constructional features</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S7/523" definition-exists="false" ipc-concordant="G01S7/523" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/523</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details of pulse systems </text><CPC-specific-text><reference><text>short-range imaging <class-ref scheme="cpc">G01S7/52017</class-ref>; methods or devices for transmitting, conducting or directing sound <class-ref scheme="cpc">G10K11/18</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/524" definition-exists="true" ipc-concordant="G01S7/524" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/524</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Transmitters</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/526" definition-exists="false" ipc-concordant="G01S7/526" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/526</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Receivers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/527" definition-exists="true" ipc-concordant="G01S7/527" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/527</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Extracting wanted echo signals </text><CPC-specific-text><reference><text>Doppler systems <class-ref scheme="cpc">G01S15/50</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/5273" definition-exists="true" ipc-concordant="G01S7/527" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/5273</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using digital techniques</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/5276" definition-exists="true" ipc-concordant="G01S7/527" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/5276</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using analogue techniques</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/529" definition-exists="true" ipc-concordant="G01S7/529" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/529</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Gain of receiver varied automatically during pulse-recurrence period </text><CPC-specific-text><reference><text>for seismic signals <class-ref scheme="cpc">G01V1/245</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/53" definition-exists="true" ipc-concordant="G01S7/53" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/53</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Means for transforming coordinates or for evaluating data, e.g. using computers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/531" definition-exists="true" ipc-concordant="G01S7/531" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/531</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Scan converters</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/533" definition-exists="true" ipc-concordant="G01S7/533" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/533</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Data rate converters</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S7/534" definition-exists="true" ipc-concordant="G01S7/534" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/534</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details of non-pulse systems </text><CPC-specific-text><reference><text>short-range imaging <class-ref scheme="cpc">G01S7/52017</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/5345" definition-exists="true" ipc-concordant="G01S7/534" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/5345</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Gain control of receivers </text><reference><text>for seismic signals <class-ref scheme="cpc">G01V1/245</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/536" definition-exists="false" ipc-concordant="G01S7/536" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/536</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Extracting wanted echo signals</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S7/537" definition-exists="true" ipc-concordant="G01S7/537" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S7/537</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Counter-measures or counter-counter-measures, e.g. jamming, anti-jamming</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S7/539" definition-exists="false" ipc-concordant="G01S7/539" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/539</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using analysis of echo signal for target characterisation</text></title-part><title-part><text>Target signature</text></title-part><title-part><text>Target cross-section</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S7/54" definition-exists="true" ipc-concordant="G01S7/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/54</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with receivers spaced apart</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S7/56" definition-exists="true" ipc-concordant="G01S7/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/56</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Display arrangements </text><CPC-specific-text><reference><text>short-range imaging <class-ref scheme="cpc">G01S7/52053</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/58" definition-exists="true" ipc-concordant="G01S7/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/58</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for providing variable ranges</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/60" definition-exists="true" ipc-concordant="G01S7/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/60</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for providing a permanent recording</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S7/62" definition-exists="true" ipc-concordant="G01S7/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S7/62</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Cathode-ray tube displays</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/6209" definition-exists="true" ipc-concordant="G01S7/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/6209</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>providing display of one measured variable</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/6218" definition-exists="false" ipc-concordant="G01S7/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/6218</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>providing two-dimensional coordinated display of distance and direction</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/6227" definition-exists="false" ipc-concordant="G01S7/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/6227</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Plan-position indicators, i.e. P.P.I.</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/6236" definition-exists="false" ipc-concordant="G01S7/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/6236</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Sector-scan displays</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/6245" definition-exists="false" ipc-concordant="G01S7/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/6245</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Stereoscopic displays; Three-dimensional displays; Pseudo-three dimensional displays</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S7/6254" definition-exists="false" ipc-concordant="G01S7/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/6254</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Grey-scale displays</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/6263" definition-exists="false" ipc-concordant="G01S7/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/6263</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in which different colours are used</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/6272" definition-exists="false" ipc-concordant="G01S7/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/6272</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>producing cursor lines and indicia by electronic means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/6281" definition-exists="false" ipc-concordant="G01S7/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/6281</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Composite displays, e.g. split-screen, multiple images</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S7/629" definition-exists="false" ipc-concordant="G01S7/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S7/629</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the display being oriented or displaced in accordance with the movement of object carrying the transmitting and receiving apparatus</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S7/64" definition-exists="false" ipc-concordant="G01S7/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2014-02-04" status="published"><classification-symbol>G01S7/64</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Luminous indications </text><reference><text><class-ref scheme="cpc">G01S7/62</class-ref> takes precedence </text><CPC-specific-text><text>; short-range imaging <class-ref scheme="cpc">G01S7/52076</class-ref></text></CPC-specific-text></reference></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G01S11/00" definition-exists="true" ipc-concordant="G01S11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S11/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Systems for determining distance or velocity not using reflection or reradiation </text><reference><text>position-fixing by co-ordinating two or more distance determinations <class-ref scheme="cpc">G01S5/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S11/02" definition-exists="true" ipc-concordant="G01S11/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S11/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using radio waves </text><reference><text><class-ref scheme="cpc">G01S19/00</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S11/023" definition-exists="false" ipc-concordant="G01S11/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S11/023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using impedance elements varying with distance</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S11/026" definition-exists="false" ipc-concordant="G01S11/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S11/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using moving transmitters</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S11/04" definition-exists="false" ipc-concordant="G01S11/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S11/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using angle measurements</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S11/06" definition-exists="false" ipc-concordant="G01S11/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S11/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using intensity measurements</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S11/08" definition-exists="true" ipc-concordant="G01S11/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S11/08</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>using synchronised clocks</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S11/10" definition-exists="false" ipc-concordant="G01S11/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S11/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using Doppler effect</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S11/12" definition-exists="true" ipc-concordant="G01S11/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S11/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using electromagnetic waves other than radio waves</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S11/125" definition-exists="false" ipc-concordant="G01S11/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S11/125</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using gamma or X-rays</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S11/14" definition-exists="true" ipc-concordant="G01S11/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S11/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using ultrasonic, sonic, or infrasonic waves</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S11/16" definition-exists="true" ipc-concordant="G01S11/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S11/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using difference in transit time between electrical and acoustic signals</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G01S13/00" definition-exists="true" ipc-concordant="G01S13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S13/00</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Systems using the reflection or reradiation of radio waves, e.g. radar systems</text></title-part><title-part><text>Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> This group <u>covers</u> : <subnote type="bullet"><note-paragraph>systems for detecting the presence of an object, e.g. by reflection or reradiation from the object itself, or from a transponder associated with the object, for determining the distance or relative velocity of an object, for providing a co-ordinated display of the distance and direction of an object or for obtaining an image thereof; </note-paragraph><note-paragraph>systems arranged for mounting on a moving craft or vehicle and using the reflection of waves from an extended surface external to the craft, e.g. the surface of the earth, to determine the velocity and direction of motion of the craft relative to the surface. </note-paragraph></subnote></note-paragraph><note-paragraph> This group <u>does not cover</u> : <subnote type="bullet"><note-paragraph>systems for determining the direction of an object by means not employing reflection or reradiation, which are covered by groups <class-ref scheme="cpc">G01S1/00</class-ref> or <class-ref scheme="cpc">G01S3/00</class-ref>; </note-paragraph><note-paragraph>systems for determining distance or velocity of an object by means not employing reflection or reradiation, which are covered by group <class-ref scheme="cpc">G01S11/00</class-ref>. </note-paragraph></subnote></note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S13/003" definition-exists="true" ipc-concordant="G01S13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bistatic radar systems; Multistatic radar systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S13/006" definition-exists="false" ipc-concordant="G01S13/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Theoretical aspects </text><reference><text><class-ref scheme="cpc">G01S7/418</class-ref>, <class-ref scheme="cpc">G01S13/9094</class-ref>, <class-ref scheme="cpc">G01S13/958</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S13/02" definition-exists="false" ipc-concordant="G01S13/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Systems using reflection of radio waves, e.g. primary radar systems</text></title-part><title-part><text>Analogous systems</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S13/0209" definition-exists="true" ipc-concordant="G01S13/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/0209</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Systems with very large relative bandwidth, i.e. larger than 10 %, e.g. baseband, pulse, carrier-free, ultrawideband</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S13/0218" definition-exists="true" ipc-concordant="G01S13/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/0218</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Very long range radars, e.g. surface wave radar, over-the-horizon or ionospheric propagation systems </text><reference><text>for meteorological use <class-ref scheme="cpc">G01S13/95</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G01S13/0227" definition-exists="false" ipc-concordant="G01S13/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S2013/0227</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>OTH, Over-The-Horizon radar</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G01S13/0236" definition-exists="false" ipc-concordant="G01S13/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S2013/0236</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Special technical features</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G01S13/0245" definition-exists="false" ipc-concordant="G01S13/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S2013/0245</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Radar with phased array antenna</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G01S13/0254" definition-exists="false" ipc-concordant="G01S13/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S2013/0254</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Active array antenna</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G01S13/0263" definition-exists="false" ipc-concordant="G01S13/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S2013/0263</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Passive array antenna</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G01S13/0272" definition-exists="false" ipc-concordant="G01S13/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S2013/0272</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multifunction radar</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G01S13/0281" definition-exists="false" ipc-concordant="G01S13/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S2013/0281</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>LPI, Low Probability of Intercept radar</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G01S13/029" definition-exists="false" ipc-concordant="G01S13/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S2013/029</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Antistealth radar</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S13/04" definition-exists="true" ipc-concordant="G01S13/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S13/04</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Systems determining presence of a target </text><reference><text>based on relative movement of target <class-ref scheme="cpc">G01S13/56</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S13/06" definition-exists="true" ipc-concordant="G01S13/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Systems determining position data of a target</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S13/08" definition-exists="true" ipc-concordant="G01S13/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Systems for measuring distance only </text><reference><text>indirect measurement <class-ref scheme="cpc">G01S13/46</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S13/10" definition-exists="false" ipc-concordant="G01S13/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S13/10</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>using transmission of interrupted, pulse modulated waves </text><reference><text>determination of distance by phase measurement <class-ref scheme="cpc">G01S13/32</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/103" definition-exists="true" ipc-concordant="G01S13/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/103</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>particularities of the measurement of the distance </text><reference><text><class-ref scheme="cpc">G01S13/12</class-ref>, <class-ref scheme="cpc">G01S13/14</class-ref>, <class-ref scheme="cpc">G01S13/16</class-ref>, <class-ref scheme="cpc">G01S13/18</class-ref> and <class-ref scheme="cpc">G01S13/20</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/106" definition-exists="true" ipc-concordant="G01S13/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/106</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using transmission of pulses having some particular characteristics </text><reference><text><class-ref scheme="cpc">G01S13/12</class-ref>, <class-ref scheme="cpc">G01S13/22</class-ref>, <class-ref scheme="cpc">G01S13/24</class-ref>, <class-ref scheme="cpc">G01S13/26</class-ref>, <class-ref scheme="cpc">G01S13/28</class-ref> and <class-ref scheme="cpc">G01S13/30</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/12" definition-exists="false" ipc-concordant="G01S13/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>wherein the pulse-recurrence frequency is varied to provide a desired time relationship between the transmission of a pulse and the receipt of the echo of a preceding pulse</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/14" definition-exists="false" ipc-concordant="G01S13/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>wherein a voltage or current pulse is initiated and terminated in accordance respectively with the pulse transmission and echo reception</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S13/16" definition-exists="false" ipc-concordant="G01S13/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using counters</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/18" definition-exists="true" ipc-concordant="G01S13/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>wherein range gates are used</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/20" definition-exists="false" ipc-concordant="G01S13/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>whereby multiple time-around echoes are used or eliminated</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/22" definition-exists="false" ipc-concordant="G01S13/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using irregular pulse repetition frequency </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G01S13/12</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S13/222" definition-exists="false" ipc-concordant="G01S13/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/222</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using random or pseudorandom pulse repetition frequency</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S13/225" definition-exists="false" ipc-concordant="G01S13/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/225</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with cyclic repetition of a non-uniform pulse sequence, e.g. staggered PRF</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S13/227" definition-exists="false" ipc-concordant="G01S13/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/227</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with repetitive trains of uniform pulse sequences, each sequence having a different pulse repetition frequency</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/24" definition-exists="false" ipc-concordant="G01S13/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using frequency agility of carrier wave</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/26" definition-exists="false" ipc-concordant="G01S13/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>wherein the transmitted pulses use a frequency- or phase-modulated carrier wave</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S13/28" definition-exists="false" ipc-concordant="G01S13/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with time compression of received pulses</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G01S13/282" definition-exists="false" ipc-concordant="G01S13/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/282</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a frequency modulated carrier wave </text><reference><text><class-ref scheme="cpc">G01S13/286</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G01S13/284" definition-exists="false" ipc-concordant="G01S13/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/284</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using coded pulses</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G01S13/286" definition-exists="false" ipc-concordant="G01S13/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/286</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>frequency shift keyed</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="15" additional-only="false" sort-key="G01S13/288" definition-exists="false" ipc-concordant="G01S13/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/288</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>phase modulated</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/30" definition-exists="false" ipc-concordant="G01S13/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using more than one pulse per radar period</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S13/32" definition-exists="false" ipc-concordant="G01S13/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S13/32</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/325" definition-exists="false" ipc-concordant="G01S13/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/325</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using transmission of coded signals, e.g. P.S.K. signals</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/34" definition-exists="false" ipc-concordant="G01S13/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S13/34</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S13/341" definition-exists="false" ipc-concordant="G01S13/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/341</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the rate of change of the transmitted frequency is adjusted to give a beat of predetermined constant frequency, e.g. by adjusting the amplitude or frequency of the frequency-modulating signal</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S13/342" definition-exists="false" ipc-concordant="G01S13/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/342</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using sinusoidal modulation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S13/343" definition-exists="false" ipc-concordant="G01S13/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/343</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using sawtooth modulation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S13/345" definition-exists="false" ipc-concordant="G01S13/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/345</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using triangular modulation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S13/346" definition-exists="false" ipc-concordant="G01S13/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/346</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using noise modulation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S13/347" definition-exists="false" ipc-concordant="G01S13/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/347</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using more than one modulation frequency</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S13/348" definition-exists="false" ipc-concordant="G01S13/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/348</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using square or rectangular modulation, e.g. diplex radar for ranging over short distances</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/36" definition-exists="false" ipc-concordant="G01S13/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with phase comparison between the received signal and the contemporaneously transmitted signal</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S13/38" definition-exists="true" ipc-concordant="G01S13/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>wherein more than one modulation frequency is used</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S13/40" definition-exists="false" ipc-concordant="G01S13/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>wherein the frequency of transmitted signal is adjusted to give a predetermined phase relationship</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S13/42" definition-exists="true" ipc-concordant="G01S13/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Simultaneous measurement of distance and other co-ordinates </text><reference><text>indirect measurement <class-ref scheme="cpc">G01S13/46</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S13/422" definition-exists="false" ipc-concordant="G01S13/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G01S13/422</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>sequential lobing, e.g. conical scan</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S13/424" definition-exists="false" ipc-concordant="G01S13/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/424</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Stacked beam radar</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S13/426" definition-exists="false" ipc-concordant="G01S13/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/426</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Scanning radar, e.g. 3D radar </text><reference><text><class-ref scheme="cpc">G01S13/66</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/428" definition-exists="false" ipc-concordant="G01S13/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/428</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>within the pulse scanning systems</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S13/44" definition-exists="true" ipc-concordant="G01S13/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Monopulse radar, i.e. simultaneous lobing</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/4409" definition-exists="true" ipc-concordant="G01S13/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/4409</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>HF sub-systems particularly adapted therefor, e.g. circuits for signal combination </text><reference><text>multi-lobing aerials or aerial systems <class-ref scheme="cpc">H01Q25/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/4418" definition-exists="false" ipc-concordant="G01S13/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/4418</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with means for eliminating radar-dependent errors in angle measurements, e.g. multipath effects</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/4427" definition-exists="false" ipc-concordant="G01S13/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/4427</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with means for eliminating the target-dependent errors in angle measurements, e.g. glint, scintillation effects</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/4436" definition-exists="false" ipc-concordant="G01S13/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/4436</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with means specially adapted to maintain the same processing characteristics between the monopulse signals</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/4445" definition-exists="false" ipc-concordant="G01S13/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/4445</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>amplitude comparisons monopulse, i.e. comparing the echo signals received by an antenna arrangement with overlapping squinted beams</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/4454" definition-exists="false" ipc-concordant="G01S13/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/4454</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>phase comparisons monopulse, i.e. comparing the echo signals received by an interferometric antenna arrangement</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/4463" definition-exists="false" ipc-concordant="G01S13/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/4463</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using phased arrays</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/4472" definition-exists="false" ipc-concordant="G01S13/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/4472</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with means specially adapted to airborne monopulse systems </text><reference><text>clutter elimination using Doppler effect: <class-ref scheme="cpc">G01S13/449</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/4481" definition-exists="false" ipc-concordant="G01S13/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/4481</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Monopulse hybrid systems, e.g. conopulse</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/449" definition-exists="false" ipc-concordant="G01S13/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/449</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Combined with MTI or Doppler processing circuits</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S13/46" definition-exists="true" ipc-concordant="G01S13/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Indirect determination of position data</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G01S13/462" definition-exists="false" ipc-concordant="G01S13/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S2013/462</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using multipath signals</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G01S13/464" definition-exists="false" ipc-concordant="G01S13/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G01S2013/464</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>using only the non-line-of-sight signal(s), e.g. to enable survey of scene 'behind' the target only the indirect signal is evaluated</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G01S13/466" definition-exists="false" ipc-concordant="G01S13/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S2013/466</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by Trilateration, i.e. two antennas or two sensors determine separately the distance to a target, whereby with the knowledge of the baseline length, i.e. the distance between the antennas or sensors, the position data of the target is determined</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G01S13/468" definition-exists="false" ipc-concordant="G01S13/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S2013/468</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by Triangulation, i.e. two antennas or two sensors determine separately the bearing, direction or angle to a target, whereby with the knowledge of the baseline length, the position data of the target is determined</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S13/48" definition-exists="true" ipc-concordant="G01S13/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using multiple beams at emission or reception</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S13/50" definition-exists="false" ipc-concordant="G01S13/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Systems of measurement based on relative movement of target</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S13/505" definition-exists="true" ipc-concordant="G01S13/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S13/505</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>using Doppler effect for determining closest range to a target or corresponding time, e.g. miss-distance indicator</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S13/52" definition-exists="true" ipc-concordant="G01S13/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S13/52</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Discriminating between fixed and moving objects or between objects moving at different speeds</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S13/522" definition-exists="false" ipc-concordant="G01S13/522" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/522</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using transmissions of interrupted pulse modulated waves</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/524" definition-exists="true" ipc-concordant="G01S13/524" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S13/524</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>based upon the phase or frequency shift resulting from movement of objects, with reference to the transmitted signals, e.g. coherent MTi</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S13/5242" definition-exists="false" ipc-concordant="G01S13/524" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/5242</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with means for platform motion or scan motion compensation, e.g. airborne MTI</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S13/5244" definition-exists="true" ipc-concordant="G01S13/524" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/5244</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Adaptive clutter cancellation </text><reference><text>specially adapted for airborne MTI, <class-ref scheme="cpc">G01S13/5242</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S13/5246" definition-exists="false" ipc-concordant="G01S13/524" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/5246</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>post processors for coherent MTI discriminators, e.g. residue cancellers, CFAR after Doppler filters</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S13/5248" definition-exists="false" ipc-concordant="G01S13/524" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/5248</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>combining a coherent MTI processor with a zero Doppler processing channel and a clutter mapped memory, e.g. MTD (Moving target detector), </text><reference><text>area MTI <class-ref scheme="cpc">G01S13/538</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S13/526" definition-exists="false" ipc-concordant="G01S13/526" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G01S13/526</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>performing filtering on the whole spectrum without loss of range information, e.g. using delay line cancellers or comb filters </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G01S13/5244</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G01S13/5265" definition-exists="true" ipc-concordant="G01S13/526" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/5265</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>IF cancellers, e.g. TACCAR systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G01S13/528" definition-exists="false" ipc-concordant="G01S13/528" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/528</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with elimination of blind speeds</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S13/53" definition-exists="false" ipc-concordant="G01S13/53" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/53</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>performing filtering on a single spectral line and associated with one or more range gates with a phase detector or a frequency mixer to extract the Doppler information, e.g. pulse Doppler radar </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G01S13/5244</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G01S13/532" definition-exists="false" ipc-concordant="G01S13/532" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/532</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a bank of range gates or a memory matrix</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S13/534" definition-exists="false" ipc-concordant="G01S13/534" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G01S13/534</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>based upon amplitude or phase shift resulting from movement of objects, with reference to the surrounding clutter echo signal, e.g. non coherent MTi, clutter referenced MTi, externally coherent MTi</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S13/536" definition-exists="false" ipc-concordant="G01S13/536" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/536</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using transmission of continuous unmodulated waves, amplitude-, frequency-, or phase-modulated waves</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S13/538" definition-exists="false" ipc-concordant="G01S13/538" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G01S13/538</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>eliminating objects that have not moved between successive antenna scans, e.g. area MTi</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S13/56" definition-exists="false" ipc-concordant="G01S13/56" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/56</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for presence detection </text><CPC-specific-text><reference><text>presence detection using near field arrangements <class-ref scheme="cpc">G01V3/00</class-ref>, e.g. <class-ref scheme="cpc">G01V3/08</class-ref>, <class-ref scheme="cpc">G01V3/12</class-ref>; burglar, theft or intruder alarms with electrical actuation <class-ref scheme="cpc">G08B13/22</class-ref> - <class-ref scheme="cpc">G08B13/26</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S13/58" definition-exists="true" ipc-concordant="G01S13/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S13/58</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Velocity or trajectory determination systems</text></title-part><title-part><text>Sense-of-movement determination systems</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S13/581" definition-exists="false" ipc-concordant="G01S13/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/581</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using transmission of interrupted pulse modulated waves and based upon the Doppler effect resulting from movement of targets</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/582" definition-exists="false" ipc-concordant="G01S13/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/582</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>adapted for simultaneous range and velocity measurements</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S13/583" definition-exists="false" ipc-concordant="G01S13/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/583</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using transmission of continuous unmodulated waves, amplitude-, frequency-, or phase-modulated waves and based upon the Doppler effect resulting from movement of targets</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/584" definition-exists="false" ipc-concordant="G01S13/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/584</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>adapted for simultaneous range and velocity measurements</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S13/585" definition-exists="false" ipc-concordant="G01S13/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/585</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>processing the video signal in order to evaluate or display the velocity value</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/586" definition-exists="false" ipc-concordant="G01S13/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/586</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using, or combined with, frequency tracking means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/587" definition-exists="true" ipc-concordant="G01S13/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S13/587</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>using optical means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S13/588" definition-exists="false" ipc-concordant="G01S13/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/588</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>deriving the velocity value from the range measurement</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S13/589" definition-exists="false" ipc-concordant="G01S13/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/589</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>measuring the velocity vector</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S13/60" definition-exists="false" ipc-concordant="G01S13/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/60</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>wherein the transmitter and receiver are mounted on the moving object, e.g. for determining ground speed, drift angle, ground track </text><reference><text><class-ref scheme="cpc">G01S13/64</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/605" definition-exists="false" ipc-concordant="G01S13/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/605</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a pattern, backscattered from the ground, to determine speed or drift by measuring the time required to cover a fixed distance</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S13/62" definition-exists="false" ipc-concordant="G01S13/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/62</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sense-of-movement determination </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G01S13/589</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S13/64" definition-exists="false" ipc-concordant="G01S13/64" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/64</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Velocity measuring systems using range gates</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S13/66" definition-exists="false" ipc-concordant="G01S13/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S13/66</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Radar-tracking systems</text></title-part><title-part><text>Analogous systems</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S13/68" definition-exists="false" ipc-concordant="G01S13/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/68</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for angle tracking only</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S13/685" definition-exists="false" ipc-concordant="G01S13/68" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/685</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using simultaneous lobing techniques</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S13/70" definition-exists="false" ipc-concordant="G01S13/70" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/70</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for range tracking only</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S13/72" definition-exists="false" ipc-concordant="G01S13/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/72</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for two-dimensional tracking, e.g. combination of angle and range tracking, track-while-scan radar</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S13/723" definition-exists="false" ipc-concordant="G01S13/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/723</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by using numerical data</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S13/726" definition-exists="false" ipc-concordant="G01S13/72" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/726</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multiple target tracking</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S13/74" definition-exists="false" ipc-concordant="G01S13/74" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/74</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Systems using reradiation of radio waves, e.g. secondary radar systems</text></title-part><title-part><text>Analogous systems</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S13/75" definition-exists="true" ipc-concordant="G01S13/75" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>G01S13/75</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>using transponders powered from received waves, e.g. using passive transponders </text><CPC-specific-text><text>, or using passive reflectors</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S13/751" definition-exists="false" ipc-concordant="G01S13/75" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/751</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the responder or reflector radiates a coded signal</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S13/753" definition-exists="false" ipc-concordant="G01S13/75" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/753</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using frequency selective elements, e.g. resonator</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S13/755" definition-exists="false" ipc-concordant="G01S13/75" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/755</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using delay lines, e.g. acoustic delay lines</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S13/756" definition-exists="true" ipc-concordant="G01S13/75" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/756</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a signal generator for modifying the reflectivity of the reflector </text><reference><text><class-ref scheme="cpc">G01S13/758</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S13/758" definition-exists="false" ipc-concordant="G01S13/75" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/758</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a signal generator powered by the interrogation signal</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S13/76" definition-exists="false" ipc-concordant="G01S13/76" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/76</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>wherein pulse-type signals are transmitted</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S13/762" definition-exists="false" ipc-concordant="G01S13/76" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-08-01" status="published"><classification-symbol>G01S13/762</classification-symbol><class-title date-revised="2016-08-01"><title-part><CPC-specific-text><text>with special measures concerning the radiation pattern, e.g. S.L.S. </text><reference><text>aerials or aerial systems providing at least two radiation patterns, e.g. providing sum and difference patterns, <class-ref scheme="cpc">H01Q25/00</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S13/765" definition-exists="false" ipc-concordant="G01S13/76" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/765</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with exchange of information between interrogator and responder</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S13/767" definition-exists="true" ipc-concordant="G01S13/76" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/767</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Responders; Transponders </text><reference><text>teaching or practice apparatus for gun-aiming or gun-laying using reflecting targets or active targets <class-ref scheme="cpc">F41G3/26</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S13/78" definition-exists="false" ipc-concordant="G01S13/78" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S13/78</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>discriminating between different kinds of targets, e.g. IFF-radar, i.e. identification of friend or foe </text><reference><text><class-ref scheme="cpc">G01S13/75</class-ref>, <class-ref scheme="cpc">G01S13/79</class-ref> take precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S13/781" definition-exists="false" ipc-concordant="G01S13/78" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/781</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Secondary Surveillance Radar [SSR] in general</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/782" definition-exists="false" ipc-concordant="G01S13/78" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/782</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using multimoding or selective addressing</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/784" definition-exists="false" ipc-concordant="G01S13/78" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/784</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Coders or decoders therefor; Degarbling systems; Defruiting systems</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S13/785" definition-exists="false" ipc-concordant="G01S13/78" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/785</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Distance Measuring Equipment [DME] systems</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/787" definition-exists="false" ipc-concordant="G01S13/78" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/787</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>co-operating with direction defining beacons</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/788" definition-exists="false" ipc-concordant="G01S13/78" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/788</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Coders or decoders therefor; Special detection circuits</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S13/79" definition-exists="false" ipc-concordant="G01S13/79" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S13/79</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Systems using random coded signals or random pulse repetition frequencies </text><CPC-specific-text><text>, e.g. "Separation and Control of Aircraft using Non synchronous Techniques" [SECANT]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S13/82" definition-exists="false" ipc-concordant="G01S13/82" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/82</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>wherein continuous-type signals are transmitted</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S13/825" definition-exists="false" ipc-concordant="G01S13/82" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/825</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with exchange of information between interrogator and responder</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S13/84" definition-exists="true" ipc-concordant="G01S13/84" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/84</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for distance determination by phase measurement</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S13/86" definition-exists="true" ipc-concordant="G01S13/86" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S13/86</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Combinations of radar systems with non-radar systems, e.g. sonar, direction finder</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S13/862" definition-exists="false" ipc-concordant="G01S13/86" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/862</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Combination of radar systems with sonar systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S13/865" definition-exists="false" ipc-concordant="G01S13/86" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/865</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Combination of radar systems with lidar systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S13/867" definition-exists="false" ipc-concordant="G01S13/86" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/867</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Combination of radar systems with cameras</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S13/87" definition-exists="true" ipc-concordant="G01S13/87" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/87</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Combinations of radar systems, e.g. primary radar and secondary radar</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S13/872" definition-exists="false" ipc-concordant="G01S13/87" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/872</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Combinations of primary radar and secondary radar</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S13/874" definition-exists="false" ipc-concordant="G01S13/87" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/874</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Combination of several systems for attitude determination </text><reference><text>in general <class-ref scheme="cpc">G01C</class-ref>, control of attitude <class-ref scheme="cpc">G05D1/08</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S13/876" definition-exists="false" ipc-concordant="G01S13/87" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/876</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Combination of several spaced transponders or reflectors of known location for determining the position of a receiver </text><reference><text><class-ref scheme="cpc">G01S13/874</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S13/878" definition-exists="true" ipc-concordant="G01S13/87" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/878</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Combination of several spaced transmitters or receivers of known location for determining the position of a transponder or a reflector </text><reference><text><class-ref scheme="cpc">G01S13/874</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S13/88" definition-exists="false" ipc-concordant="G01S13/88" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/88</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Radar or analogous systems specially adapted for specific applications </text><reference><text>electromagnetic prospecting or detecting of objects, e.g. near-field detection, <class-ref scheme="cpc">G01V3/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S13/881" definition-exists="false" ipc-concordant="G01S13/88" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/881</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for robotics</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S13/882" definition-exists="false" ipc-concordant="G01S13/88" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/882</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for altimeters </text><reference><text>measuring height using barometric means <class-ref scheme="cpc">G01C5/06</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S13/883" definition-exists="false" ipc-concordant="G01S13/88" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/883</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for missile homing, autodirectors </text><reference><text>missile guidance systems <class-ref scheme="cpc">F41G7/22</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S13/885" definition-exists="true" ipc-concordant="G01S13/88" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/885</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for ground probing </text><reference><text>prospecting or detecting using electromagnetic waves <class-ref scheme="cpc">G01V3/12</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S13/886" definition-exists="false" ipc-concordant="G01S13/88" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/886</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for alarm systems </text><reference><text>alarms with electrical actuation <class-ref scheme="cpc">G08B13/22</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S13/887" definition-exists="true" ipc-concordant="G01S13/88" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/887</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for detection of concealed objects, e.g. contraband or weapons</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S13/888" definition-exists="false" ipc-concordant="G01S13/88" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/888</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>through wall detection</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S13/89" definition-exists="false" ipc-concordant="G01S13/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G01S13/89</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for mapping or imaging</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S13/895" definition-exists="false" ipc-concordant="G01S13/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G01S13/895</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Side looking radar [SLR]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S13/90" definition-exists="false" ipc-concordant="G01S13/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G01S13/90</classification-symbol><class-title date-revised="2019-05-01"><title-part><text>using synthetic aperture techniques </text><CPC-specific-text><text>, e.g. synthetic aperture radar [SAR] techniques</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S13/9004" definition-exists="false" ipc-concordant="G01S13/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G01S13/9004</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>SAR image acquisition techniques</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/9005" definition-exists="false" ipc-concordant="G01S13/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G01S13/9005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with optical processing of the SAR signals</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/9011" definition-exists="false" ipc-concordant="G01S13/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G01S13/9011</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with frequency domain processing of the SAR signals in azimuth </text><reference><text><class-ref scheme="cpc">G01S13/9005</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/9017" definition-exists="false" ipc-concordant="G01S13/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G01S13/9017</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>with time domain processing of the SAR signals in azimuth </text><reference><text><class-ref scheme="cpc">G01S13/9005</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/9019" definition-exists="false" ipc-concordant="G01S13/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G01S13/9019</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Auto-focussing of the SAR signals</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S13/9021" definition-exists="false" ipc-concordant="G01S13/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G01S13/9021</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>SAR image post-processing techniques</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/9023" definition-exists="true" ipc-concordant="G01S13/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G01S13/9023</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>combined with interferometric techniques</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/9027" definition-exists="false" ipc-concordant="G01S13/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G01S13/9027</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Pattern recognition for feature extraction</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/9029" definition-exists="true" ipc-concordant="G01S13/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G01S13/9029</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>specially adapted for moving target detection within a single SAR image or within multiple SAR images taken at the same time</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S13/904" definition-exists="false" ipc-concordant="G01S13/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G01S13/904</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>SAR modes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/9041" definition-exists="false" ipc-concordant="G01S13/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G01S13/9041</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Squint mode</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/9043" definition-exists="false" ipc-concordant="G01S13/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G01S13/9043</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Forward-looking SAR</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/9047" definition-exists="false" ipc-concordant="G01S13/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G01S13/9047</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Doppler beam sharpening mode</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/9052" definition-exists="false" ipc-concordant="G01S13/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G01S13/9052</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Spotlight mode</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/9054" definition-exists="false" ipc-concordant="G01S13/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G01S13/9054</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Stripmap mode</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/9056" definition-exists="false" ipc-concordant="G01S13/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G01S13/9056</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Scan SAR mode</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/9058" definition-exists="false" ipc-concordant="G01S13/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G01S13/9058</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Bistatic or multistatic SAR</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/9064" definition-exists="false" ipc-concordant="G01S13/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G01S13/9064</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Inverse SAR [ISAR]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/9076" definition-exists="false" ipc-concordant="G01S13/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G01S13/9076</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Polarimetric features in SAR</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/9082" definition-exists="false" ipc-concordant="G01S13/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G01S13/9082</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Rotating SAR [ROSAR]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/9088" definition-exists="false" ipc-concordant="G01S13/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G01S13/9088</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>Circular SAR [CSAR, C-SAR]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/9089" definition-exists="false" ipc-concordant="G01S13/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G01S13/9089</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>SAR having an irregular aperture</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S13/9092" definition-exists="false" ipc-concordant="G01S13/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G01S13/9092</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>combined with monopulse techniques</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S13/9094" definition-exists="false" ipc-concordant="G01S13/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/9094</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Theoretical aspects</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S13/91" definition-exists="true" ipc-concordant="G01S13/91" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G01S13/91</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for traffic control </text><reference><text><class-ref scheme="cpc">G01S13/93</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S13/913" definition-exists="false" ipc-concordant="G01S13/91" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/913</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for landing purposes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G01S13/916" definition-exists="false" ipc-concordant="G01S13/91" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S2013/916</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Airport surface monitoring [ASDE]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S13/917" definition-exists="false" ipc-concordant="G01S13/91" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G01S13/917</classification-symbol><class-title date-revised="2019-05-01"><title-part><CPC-specific-text><text>for marine craft or other waterborne vessels</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S13/92" definition-exists="true" ipc-concordant="G01S13/92" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/92</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for velocity measurement</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S13/93" definition-exists="false" ipc-concordant="G01S13/93" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/93</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for anti-collision purposes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S13/931" definition-exists="false" ipc-concordant="G01S13/931" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S13/931</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>of land vehicles</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G01S13/9314" definition-exists="false" ipc-concordant="G01S13/931" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S2013/9314</classification-symbol><class-title date-revised="2020-01-01"><title-part><CPC-specific-text><text>Parking operations</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G01S13/9315" definition-exists="false" ipc-concordant="G01S13/931" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S2013/9315</classification-symbol><class-title date-revised="2020-01-01"><title-part><CPC-specific-text><text>Monitoring blind spots</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G01S13/9316" definition-exists="false" ipc-concordant="G01S13/931" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S2013/9316</classification-symbol><class-title date-revised="2020-01-01"><title-part><CPC-specific-text><text>combined with communication equipment with other vehicles or with base stations</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G01S13/9317" definition-exists="false" ipc-concordant="G01S13/931" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S2013/9317</classification-symbol><class-title date-revised="2020-01-01"><title-part><CPC-specific-text><text>Driving backwards</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G01S13/9318" definition-exists="false" ipc-concordant="G01S13/931" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S2013/9318</classification-symbol><class-title date-revised="2020-01-01"><title-part><CPC-specific-text><text>Controlling the steering</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G01S13/93185" definition-exists="false" ipc-concordant="G01S13/931" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S2013/93185</classification-symbol><class-title date-revised="2020-01-01"><title-part><CPC-specific-text><text>Controlling the brakes</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G01S13/9319" definition-exists="false" ipc-concordant="G01S13/931" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S2013/9319</classification-symbol><class-title date-revised="2020-01-01"><title-part><CPC-specific-text><text>Controlling the accelerator</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G01S13/932" definition-exists="false" ipc-concordant="G01S13/931" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S2013/932</classification-symbol><class-title date-revised="2020-01-01"><title-part><CPC-specific-text><text>using own vehicle data, e.g. ground speed, steering wheel direction</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G01S13/9321" definition-exists="false" ipc-concordant="G01S13/931" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S2013/9321</classification-symbol><class-title date-revised="2020-01-01"><title-part><CPC-specific-text><text>Velocity regulation, e.g. cruise control</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G01S13/9322" definition-exists="false" ipc-concordant="G01S13/931" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S2013/9322</classification-symbol><class-title date-revised="2020-01-01"><title-part><CPC-specific-text><text>using additional data, e.g. driver condition, road state or weather data</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G01S13/9323" definition-exists="false" ipc-concordant="G01S13/931" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S2013/9323</classification-symbol><class-title date-revised="2020-01-01"><title-part><CPC-specific-text><text>Alternative operation using light waves</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G01S13/9324" definition-exists="false" ipc-concordant="G01S13/931" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S2013/9324</classification-symbol><class-title date-revised="2020-01-01"><title-part><CPC-specific-text><text>Alternative operation using ultrasonic waves</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G01S13/9325" definition-exists="false" ipc-concordant="G01S13/931" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S2013/9325</classification-symbol><class-title date-revised="2020-01-01"><title-part><CPC-specific-text><text>for inter-vehicle distance regulation, e.g. navigating in platoons</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G01S13/9327" definition-exists="false" ipc-concordant="G01S13/931" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S2013/9327</classification-symbol><class-title date-revised="2020-01-01"><title-part><CPC-specific-text><text>Sensor installation details</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G01S13/93271" definition-exists="false" ipc-concordant="G01S13/931" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S2013/93271</classification-symbol><class-title date-revised="2020-01-01"><title-part><CPC-specific-text><text>in the front of the vehicles</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G01S13/93272" definition-exists="false" ipc-concordant="G01S13/931" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S2013/93272</classification-symbol><class-title date-revised="2020-01-01"><title-part><CPC-specific-text><text>in the back of the vehicles</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G01S13/93273" definition-exists="false" ipc-concordant="G01S13/931" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S2013/93273</classification-symbol><class-title date-revised="2020-01-01"><title-part><CPC-specific-text><text>on the top of the vehicles</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G01S13/93274" definition-exists="false" ipc-concordant="G01S13/931" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S2013/93274</classification-symbol><class-title date-revised="2020-01-01"><title-part><CPC-specific-text><text>on the side of the vehicles</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G01S13/93275" definition-exists="false" ipc-concordant="G01S13/931" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S2013/93275</classification-symbol><class-title date-revised="2020-01-01"><title-part><CPC-specific-text><text>in the bumper area</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G01S13/93276" definition-exists="false" ipc-concordant="G01S13/931" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S2013/93276</classification-symbol><class-title date-revised="2020-01-01"><title-part><CPC-specific-text><text>in the windshield area</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G01S13/93277" definition-exists="false" ipc-concordant="G01S13/931" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S2013/93277</classification-symbol><class-title date-revised="2020-01-01"><title-part><CPC-specific-text><text>in the lights</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G01S13/9328" definition-exists="false" ipc-concordant="G01S13/931" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S2013/9328</classification-symbol><class-title date-revised="2020-01-01"><title-part><CPC-specific-text><text>Rail vehicles</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G01S13/9329" definition-exists="false" ipc-concordant="G01S13/931" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S2013/9329</classification-symbol><class-title date-revised="2020-01-01"><title-part><CPC-specific-text><text>cooperating with reflectors or transponders</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S13/933" definition-exists="true" ipc-concordant="G01S13/933" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S13/933</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>of aircraft or spacecraft</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S13/934" definition-exists="false" ipc-concordant="G01S13/934" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S13/934</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>on airport surfaces, e.g. while taxiing</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S13/935" definition-exists="false" ipc-concordant="G01S13/935" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S13/935</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>for terrain-avoidance</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S13/937" definition-exists="false" ipc-concordant="G01S13/937" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S13/937</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>of marine craft</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S13/95" definition-exists="true" ipc-concordant="G01S13/95" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/95</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for meteorological use</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S13/951" definition-exists="false" ipc-concordant="G01S13/95" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/951</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>ground based</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S13/953" definition-exists="false" ipc-concordant="G01S13/95" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/953</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>mounted on aircraft</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S13/955" definition-exists="false" ipc-concordant="G01S13/95" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/955</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>mounted on satellite</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S13/956" definition-exists="false" ipc-concordant="G01S13/95" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/956</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>mounted on ship or other platform</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S13/958" definition-exists="false" ipc-concordant="G01S13/95" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S13/958</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Theoretical aspects</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G01S15/00" definition-exists="true" ipc-concordant="G01S15/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph> This group <u>covers</u> : <subnote type="bullet"><note-paragraph>systems for detecting the presence of an object, e.g. by reflection or reradiation from the object itself, or from a transponder associated with the object, for determining the distance or relative velocity of an object, for providing a co-ordinated display of the distance and direction of an object or for obtaining an image thereof; </note-paragraph><note-paragraph>systems arranged for mounting on a moving craft or vehicle and using the reflection of waves from an extended surface external to the craft, e.g. the surface of the earth, to determine the velocity and direction of motion of the craft relative to the surface. </note-paragraph></subnote></note-paragraph><note-paragraph> This group <u>does not cover</u> : <subnote type="bullet"><note-paragraph>systems for determining the direction of an object by means not employing reflection or reradiation, which are covered by groups <class-ref scheme="cpc">G01S1/00</class-ref> or <class-ref scheme="cpc">G01S3/00</class-ref>; </note-paragraph><note-paragraph>systems for determining distance or velocity of an object by means not employing reflection or reradiation, which are covered by group <class-ref scheme="cpc">G01S11/00</class-ref>. </note-paragraph></subnote></note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S15/003" definition-exists="false" ipc-concordant="G01S15/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bistatic sonar systems; Multistatic sonar systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S15/006" definition-exists="false" ipc-concordant="G01S15/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Theoretical aspects</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S15/02" definition-exists="false" ipc-concordant="G01S15/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using reflection of acoustic waves </text><reference><text><class-ref scheme="cpc">G01S15/66</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S15/04" definition-exists="true" ipc-concordant="G01S15/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Systems determining presence of a target</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S15/06" definition-exists="true" ipc-concordant="G01S15/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Systems determining the position data of a target</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S15/08" definition-exists="true" ipc-concordant="G01S15/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Systems for measuring distance only </text><reference><text>indirect measurement <class-ref scheme="cpc">G01S15/46</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S15/10" definition-exists="false" ipc-concordant="G01S15/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S15/10</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>using transmission of interrupted, pulse-modulated waves </text><reference><text>determination of distance by phase measurement <class-ref scheme="cpc">G01S15/32</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S15/101" definition-exists="true" ipc-concordant="G01S15/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/101</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Particularities of the measurement of distance </text><reference><text><class-ref scheme="cpc">G01S15/12</class-ref>, <class-ref scheme="cpc">G01S15/14</class-ref>, and <class-ref scheme="cpc">G01S15/18</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S15/102" definition-exists="false" ipc-concordant="G01S15/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/102</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using transmission of pulses having some particular characteristics</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S15/104" definition-exists="false" ipc-concordant="G01S15/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/104</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein the transmitted pulses use a frequency- or phase-modulated carrier wave</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S15/105" definition-exists="false" ipc-concordant="G01S15/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/105</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using irregular pulse repetition frequency</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S15/107" definition-exists="false" ipc-concordant="G01S15/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/107</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using frequency agility of carrier wave</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S15/108" definition-exists="false" ipc-concordant="G01S15/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/108</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using more than one pulse per sonar period</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S15/12" definition-exists="false" ipc-concordant="G01S15/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>wherein the pulse-recurrence frequency is varied to provide a desired time relationship between the transmission of a pulse and the receipt of the echo of a preceding pulse</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S15/14" definition-exists="false" ipc-concordant="G01S15/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>wherein a voltage or current pulse is initiated and terminated in accordance respectively with the pulse transmission and echo reception</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S15/18" definition-exists="false" ipc-concordant="G01S15/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>wherein range gates are used</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S15/32" definition-exists="false" ipc-concordant="G01S15/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S15/32</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S15/325" definition-exists="false" ipc-concordant="G01S15/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/325</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using transmission of coded signals, e.g. of phase-shift keyed [PSK] signals</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S15/34" definition-exists="false" ipc-concordant="G01S15/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S15/34</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S15/36" definition-exists="false" ipc-concordant="G01S15/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with phase comparison between the received signal and the contemporaneously transmitted signal</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S15/42" definition-exists="true" ipc-concordant="G01S15/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Simultaneous measurement of distance and other co-ordinates </text><reference><text>indirect measurement <class-ref scheme="cpc">G01S15/46</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S15/46" definition-exists="true" ipc-concordant="G01S15/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Indirect determination of position data</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G01S15/465" definition-exists="false" ipc-concordant="G01S15/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S2015/465</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by Trilateration, i.e. two transducers determine separately the distance to a target, whereby with the knowledge of the baseline length, i.e. the distance between the transducers, the position data of the target is determined</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S15/50" definition-exists="false" ipc-concordant="G01S15/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Systems of measurement, based on relative movement of the target</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S15/52" definition-exists="false" ipc-concordant="G01S15/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Discriminating between fixed and moving objects or between objects moving at different speeds</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S15/523" definition-exists="false" ipc-concordant="G01S15/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/523</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for presence detection </text><reference><text>burglar, theft or intruder alarms <class-ref scheme="cpc">G08B13/00</class-ref>, e.g. <class-ref scheme="cpc">G08B13/16</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S15/526" definition-exists="false" ipc-concordant="G01S15/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/526</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by comparing echos in different sonar periods</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S15/58" definition-exists="true" ipc-concordant="G01S15/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/58</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Velocity or trajectory determination systems</text></title-part><title-part><text>Sense-of-movement determination systems </text><CPC-specific-text><reference><text>velocity measurement in imaging systems <class-ref scheme="cpc">G01S15/8979</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S15/582" definition-exists="false" ipc-concordant="G01S15/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/582</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using transmission of interrupted pulse-modulated waves and based upon the Doppler effect resulting from movement of targets</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S15/584" definition-exists="false" ipc-concordant="G01S15/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/584</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with measures taken for suppressing velocity ambiguities, i.e. anti-aliasing</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S15/586" definition-exists="false" ipc-concordant="G01S15/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/586</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using transmission of continuous unmodulated waves, amplitude-, frequency-, or phase-modulated waves and based upon the Doppler effect resulting from movement of targets</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S15/588" definition-exists="false" ipc-concordant="G01S15/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/588</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>measuring the velocity vector</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S15/60" definition-exists="false" ipc-concordant="G01S15/60" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/60</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>wherein the transmitter and receiver are mounted on the moving object, e.g. for determining ground speed, drift angle, ground track</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S15/62" definition-exists="false" ipc-concordant="G01S15/62" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/62</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sense-of-movement determination </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G01S15/588</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S15/66" definition-exists="false" ipc-concordant="G01S15/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/66</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sonar tracking systems</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S15/74" definition-exists="true" ipc-concordant="G01S15/74" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S15/74</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Systems using reradiation of acoustic waves, e.g. IFF, i.e. identification of friend or foe</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S15/86" definition-exists="true" ipc-concordant="G01S15/86" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S15/86</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Combinations of sonar systems with lidar systems</text></title-part><title-part><text>Combinations of sonar systems with systems not using wave reflection</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S15/87" definition-exists="false" ipc-concordant="G01S15/87" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/87</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Combinations of sonar systems</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S15/872" definition-exists="false" ipc-concordant="G01S15/87" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/872</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Combination of several systems for attitude determination </text><reference><text>using inertial means <class-ref scheme="cpc">G01C9/00</class-ref>, control of attitude <class-ref scheme="cpc">G05D1/08</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S15/874" definition-exists="false" ipc-concordant="G01S15/87" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/874</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Combination of several spaced transponders or reflectors of known location for determining the position of a receiver </text><reference><text><class-ref scheme="cpc">G01S15/872</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S15/876" definition-exists="false" ipc-concordant="G01S15/87" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/876</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Combination of several spaced transmitters or receivers of known location for determining the position of a transponder or a reflector </text><reference><text><class-ref scheme="cpc">G01S15/872</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S15/878" definition-exists="false" ipc-concordant="G01S15/87" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/878</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>wherein transceivers are operated, either sequentially or simultaneously, both in bi-static and in mono-static mode, e.g. cross-echo mode</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S15/88" definition-exists="false" ipc-concordant="G01S15/88" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/88</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sonar systems specially adapted for specific applications </text><reference><text>seismic or acoustic prospecting or detecting <class-ref scheme="cpc">G01V1/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S15/885" definition-exists="true" ipc-concordant="G01S15/88" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/885</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Meteorological systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S15/89" definition-exists="false" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/89</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for mapping or imaging</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S15/8902" definition-exists="false" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/8902</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Side-looking sonar</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S15/8904" definition-exists="false" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/8904</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using synthetic aperture techniques</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S15/8906" definition-exists="true" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/8906</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S15/8909" definition-exists="true" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S15/8909</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>using a static transducer configuration</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S15/8911" definition-exists="false" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/8911</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a single transducer for transmission and reception</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S15/8913" definition-exists="false" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/8913</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using separate transducers for transmission and reception</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S15/8915" definition-exists="false" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/8915</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a transducer array</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S15/8918" definition-exists="false" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/8918</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the array being linear</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S15/892" definition-exists="false" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/892</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the array being curvilinear</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S15/8922" definition-exists="false" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/8922</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the array being concentric or annular</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S15/8925" definition-exists="false" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/8925</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the array being a two-dimensional transducer configuration, i.e. matrix or orthogonal linear arrays</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S15/8927" definition-exists="false" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/8927</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using simultaneously or sequentially two or more subarrays or subapertures</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S15/8929" definition-exists="false" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/8929</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a three-dimensional transducer configuration</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S15/8931" definition-exists="false" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/8931</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>co-operating with moving reflectors</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S15/8934" definition-exists="true" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S15/8934</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>using a dynamic transducer configuration</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S15/8936" definition-exists="false" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/8936</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using transducers mounted for mechanical movement in three dimensions</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S15/8938" definition-exists="false" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/8938</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using transducers mounted for mechanical movement in two dimensions</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S15/894" definition-exists="false" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/894</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by rotation about a single axis</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="14" additional-only="false" sort-key="G01S15/8943" definition-exists="false" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/8943</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>co-operating with reflectors</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S15/8945" definition-exists="false" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/8945</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using transducers mounted for linear mechanical movement</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S15/8947" definition-exists="false" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/8947</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using transducers movable by (electro)magnetic means</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S15/895" definition-exists="true" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/895</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>characterised by the transmitted frequency spectrum</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S15/8952" definition-exists="false" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/8952</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using discrete, multiple frequencies</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S15/8954" definition-exists="false" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/8954</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a broad-band spectrum</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S15/8956" definition-exists="false" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/8956</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using frequencies at or above 20 MHz</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S15/8959" definition-exists="true" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/8959</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using coded signals for correlation purposes</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S15/8961" definition-exists="false" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/8961</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using pulse compression</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S15/8963" definition-exists="false" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/8963</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using pulse inversion</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S15/8965" definition-exists="true" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/8965</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using acousto-optical or acousto-electronic conversion techniques</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S15/8968" definition-exists="true" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/8968</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using acoustical modulation of a light beam </text><reference><text>acousto-optical light control devices <class-ref scheme="cpc">G02F1/11</class-ref>, <class-ref scheme="cpc">G02F1/33</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S15/897" definition-exists="true" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S15/897</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>using application of holographic techniques</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="G01S15/8972" definition-exists="false" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/8972</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with optical reconstruction of the image</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S15/8975" definition-exists="true" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/8975</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using acoustical image/electron beam converter tubes </text><reference><text>tubes therefor <class-ref scheme="cpc">H01J31/495</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S15/8977" definition-exists="true" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S15/8977</classification-symbol><class-title date-revised="2021-01-01"><title-part><CPC-specific-text><text>using special techniques for image reconstruction, e.g. FFT, geometrical transformations, spatial deconvolution, time deconvolution</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S15/8979" definition-exists="true" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/8979</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Combined Doppler and pulse-echo imaging systems</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S15/8981" definition-exists="false" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/8981</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Discriminating between fixed and moving objects or between objects moving at different speeds, e.g. wall clutter filter</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S15/8984" definition-exists="false" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/8984</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Measuring the velocity vector</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S15/8986" definition-exists="false" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/8986</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with measures taken for suppressing velocity ambiguities, i.e. anti-aliasing</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S15/8988" definition-exists="false" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/8988</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Colour Doppler imaging</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S15/899" definition-exists="true" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/899</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Combination of imaging systems with ancillary equipment</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S15/8993" definition-exists="true" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/8993</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Three dimensional imaging systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S15/8995" definition-exists="true" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/8995</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Combining images from different aspect angles, e.g. spatial compounding</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S15/8997" definition-exists="false" ipc-concordant="G01S15/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/8997</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using synthetic aperture techniques</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S15/93" definition-exists="false" ipc-concordant="G01S15/93" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/93</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for anti-collision purposes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S15/931" definition-exists="false" ipc-concordant="G01S15/931" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S15/931</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>of land vehicles</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G01S15/932" definition-exists="false" ipc-concordant="G01S15/931" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S2015/932</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for parking operations</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G01S15/933" definition-exists="false" ipc-concordant="G01S15/931" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S2015/933</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for measuring the dimensions of the parking space when driving past</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G01S15/934" definition-exists="false" ipc-concordant="G01S15/931" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S2015/934</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for measuring the depth, i.e. width, not length, of the parking space</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G01S15/935" definition-exists="false" ipc-concordant="G01S15/931" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S2015/935</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for measuring the contour, e.g. a trajectory of measurement points, representing the boundary of the parking space</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="13" additional-only="true" sort-key="G01S15/936" definition-exists="false" ipc-concordant="G01S15/931" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S2015/936</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>for measuring parking spaces extending transverse or diagonal to the driving direction, i.e. not parallel to the driving direction</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="11" additional-only="true" sort-key="G01S15/937" definition-exists="false" ipc-concordant="G01S15/931" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S2015/937</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>sensor installation details </text><reference><text>constructional features of transducers <class-ref scheme="cpc">G01S7/521</class-ref> and <class-ref scheme="cpc">B06B</class-ref>; casing of transducers, e.g. housing, cover or filler details, <class-ref scheme="cpc">G10K9/22</class-ref>; mounting of transducers, i.e. fixture, fitting or holder details, <class-ref scheme="cpc">G10K11/004</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G01S15/938" definition-exists="false" ipc-concordant="G01S15/931" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S2015/938</classification-symbol><class-title date-revised="2020-01-01"><title-part><CPC-specific-text><text>in the bumper area </text><reference><text>radar in bumper area <class-ref scheme="cpc">G01S2013/93275</class-ref>; bumper with obstacle sensor of electric or electronic type <class-ref scheme="cpc">B60R19/483</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="12" additional-only="true" sort-key="G01S15/939" definition-exists="false" ipc-concordant="G01S15/931" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S2015/939</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>vertical stacking of sensors, e.g. to enable obstacle height determination</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S15/96" definition-exists="false" ipc-concordant="G01S15/96" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S15/96</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for locating fish</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G01S17/00" definition-exists="true" ipc-concordant="G01S17/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S17/00</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph>This group <u>covers</u>:<subnote type="bullet"><note-paragraph>systems for detecting the presence of an object, e.g. by reflection or reradiation from the object itself, or from a transponder associated with the object, for determining the distance or relative velocity of an object, for providing a coordinated display of the distance and direction of an object or for obtaining an image thereof;</note-paragraph><note-paragraph>systems arranged for mounting on a moving craft or vehicle and using the reflection of waves from an extended surface external to the craft, e.g. the surface of the earth, to determine the velocity and direction of motion of the craft relative to the surface.</note-paragraph></subnote></note-paragraph><note-paragraph>This subclass <u>does not cover</u>: <subnote type="bullet"> <note-paragraph>systems for determining the direction of anobject by means not employing reflectionor reradiation which are covered by groups <class-ref scheme="cpc">G01S1/00</class-ref> or <class-ref scheme="cpc">G01S3/00</class-ref>;</note-paragraph><note-paragraph>systems for determining distance or velocity of an object by means not employing reflection or reradiation, which are covered by group <class-ref scheme="cpc">G01S11/00</class-ref>.</note-paragraph> </subnote> </note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S17/003" definition-exists="false" ipc-concordant="G01S17/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S17/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Bistatic lidar systems; Multistatic lidar systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S17/006" definition-exists="false" ipc-concordant="G01S17/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S17/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Theoretical aspects</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S17/02" definition-exists="false" ipc-concordant="G01S17/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S17/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Systems using the reflection of electromagnetic waves other than radio waves </text><reference><text><class-ref scheme="cpc">G01S17/66</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S17/04" definition-exists="true" ipc-concordant="G01S17/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S17/04</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Systems determining the presence of a target</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S17/06" definition-exists="true" ipc-concordant="G01S17/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S17/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Systems determining position data of a target</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S17/08" definition-exists="true" ipc-concordant="G01S17/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S17/08</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>for measuring distance only </text><reference><text>indirect measurement <class-ref scheme="cpc">G01S17/46</class-ref>; active triangulation systems <class-ref scheme="cpc">G01S17/48</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S17/10" definition-exists="false" ipc-concordant="G01S17/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S17/10</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>using transmission of interrupted, pulse-modulated waves </text><reference><text>determination of distance by phase measurements <class-ref scheme="cpc">G01S17/32</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S17/14" definition-exists="false" ipc-concordant="G01S17/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S17/14</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>wherein a voltage or current pulse is initiated and terminated in accordance with the pulse transmission and echo reception respectively, e.g. using counters</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S17/18" definition-exists="false" ipc-concordant="G01S17/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S17/18</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>wherein range gates are used</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S17/26" definition-exists="false" ipc-concordant="G01S17/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S17/26</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>wherein the transmitted pulses use a frequency-modulated or phase-modulated carrier wave, e.g. for pulse compression of received signals</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S17/32" definition-exists="true" ipc-concordant="G01S17/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S17/32</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S17/34" definition-exists="false" ipc-concordant="G01S17/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S17/34</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S17/36" definition-exists="false" ipc-concordant="G01S17/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S17/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with phase comparison between the received signal and the contemporaneously transmitted signal</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S17/42" definition-exists="true" ipc-concordant="G01S17/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S17/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Simultaneous measurement of distance and other co-ordinates </text><reference><text>indirect measurement <class-ref scheme="cpc">G01S17/46</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S17/46" definition-exists="true" ipc-concordant="G01S17/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S17/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Indirect determination of position data</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S17/48" definition-exists="true" ipc-concordant="G01S17/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S17/48</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Active triangulation systems, i.e. using the transmission and reflection of electromagnetic waves other than radio waves</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S17/50" definition-exists="false" ipc-concordant="G01S17/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S17/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Systems of measurement based on relative movement of target</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S17/58" definition-exists="true" ipc-concordant="G01S17/58" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S17/58</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Velocity or trajectory determination systems</text></title-part><title-part><text>Sense-of-movement determination systems</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S17/66" definition-exists="false" ipc-concordant="G01S17/66" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S17/66</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Tracking systems using electromagnetic waves other than radio waves</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S17/74" definition-exists="true" ipc-concordant="G01S17/74" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S17/74</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Systems using reradiation of electromagnetic waves other than radio waves, e.g. IFF, i.e. identification of friend or foe</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S17/86" definition-exists="false" ipc-concordant="G01S17/86" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S17/86</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>Combinations of lidar systems with systems other than lidar, radar or sonar, e.g. with direction finders</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S17/87" definition-exists="false" ipc-concordant="G01S17/87" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S17/87</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Combinations of systems using electromagnetic waves other than radio waves</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S17/875" definition-exists="false" ipc-concordant="G01S17/875" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S17/875</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>for determining attitude</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S17/88" definition-exists="false" ipc-concordant="G01S17/88" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S17/88</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lidar systems specially adapted for specific applications</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S17/89" definition-exists="true" ipc-concordant="G01S17/89" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G01S17/89</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for mapping or imaging</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S17/894" definition-exists="true" ipc-concordant="G01S17/894" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2022-01-01" status="published"><classification-symbol>G01S17/894</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>3D imaging with simultaneous measurement of time-of-flight at a 2D array of receiver pixels, e.g. time-of-flight cameras or flash lidar</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S17/90" definition-exists="false" ipc-concordant="G01S17/90" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S17/90</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>using synthetic aperture techniques</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S17/93" definition-exists="false" ipc-concordant="G01S17/93" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S17/93</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for anti-collision purposes</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S17/931" definition-exists="false" ipc-concordant="G01S17/931" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S17/931</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>of land vehicles</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S17/933" definition-exists="false" ipc-concordant="G01S17/933" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-01-01" status="published"><classification-symbol>G01S17/933</classification-symbol><class-title date-revised="2020-01-01"><title-part><text>of aircraft or spacecraft</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S17/95" definition-exists="false" ipc-concordant="G01S17/95" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S17/95</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for meteorological use</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="G01S19/00" definition-exists="true" ipc-concordant="G01S19/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S19/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Satellite radio beacon positioning systems</text></title-part><title-part><text>Determining position, velocity or attitude using signals transmitted by such systems</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S19/01" definition-exists="false" ipc-concordant="G01S19/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/01</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S19/015" definition-exists="false" ipc-concordant="G01S19/01" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/015</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Arrangements for jamming, spoofing or other methods of denial of service of such systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S19/02" definition-exists="false" ipc-concordant="G01S19/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Details of the space or ground control segments</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S19/03" definition-exists="true" ipc-concordant="G01S19/03" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/03</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cooperating elements</text></title-part><title-part><text>Interaction or communication between different cooperating elements or between cooperating elements and receivers</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph>The term "cooperating elements" designates additional elements or subsystems, including receivers of other users, which interact or communicate with the receiver or the satellite positioning system.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S19/04" definition-exists="false" ipc-concordant="G01S19/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>providing carrier phase data</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S19/05" definition-exists="false" ipc-concordant="G01S19/05" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S19/05</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>providing aiding data</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S19/06" definition-exists="false" ipc-concordant="G01S19/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>employing an initial estimate of the location of the receiver as aiding data or in generating aiding data</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S19/07" definition-exists="false" ipc-concordant="G01S19/07" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G01S19/07</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>providing data for correcting measured positioning data, e.g. DGPS [differential GPS] or ionosphere corrections</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S19/071" definition-exists="false" ipc-concordant="G01S19/07" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G01S19/071</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>DGPS corrections</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S19/072" definition-exists="false" ipc-concordant="G01S19/07" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G01S19/072</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>Ionosphere corrections</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S19/073" definition-exists="false" ipc-concordant="G01S19/07" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G01S19/073</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>involving a network of fixed stations</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S19/074" definition-exists="false" ipc-concordant="G01S19/07" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G01S19/074</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>providing integrity data, e.g. WAAS</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S19/08" definition-exists="false" ipc-concordant="G01S19/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>providing integrity information, e.g. health of satellites or quality of ephemeris data</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S19/09" definition-exists="false" ipc-concordant="G01S19/09" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/09</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>providing processing capability normally carried out by the receiver</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S19/10" definition-exists="true" ipc-concordant="G01S19/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>providing dedicated supplementary positioning signals</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S19/11" definition-exists="false" ipc-concordant="G01S19/11" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G01S19/11</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>wherein the cooperating elements are pseudolites or satellite radio beacon positioning system signal repeaters</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S19/115" definition-exists="false" ipc-concordant="G01S19/11" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G01S19/115</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>Airborne or satellite based pseudolites or repeaters</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S19/12" definition-exists="false" ipc-concordant="G01S19/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>wherein the cooperating elements are telecommunication base stations</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S19/13" definition-exists="true" ipc-concordant="G01S19/13" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/13</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Receivers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S19/14" definition-exists="true" ipc-concordant="G01S19/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>specially adapted for specific applications</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S19/15" definition-exists="false" ipc-concordant="G01S19/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/15</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Aircraft landing systems</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S19/16" definition-exists="false" ipc-concordant="G01S19/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Anti-theft</text></title-part><title-part><text>Abduction</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S19/17" definition-exists="false" ipc-concordant="G01S19/17" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/17</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Emergency applications</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S19/18" definition-exists="false" ipc-concordant="G01S19/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Military applications</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S19/19" definition-exists="false" ipc-concordant="G01S19/19" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/19</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Sporting applications</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S19/20" definition-exists="false" ipc-concordant="G01S19/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Integrity monitoring, fault detection or fault isolation of space segment</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S19/21" definition-exists="true" ipc-concordant="G01S19/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S19/21</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Interference related issues </text><CPC-specific-text><text>; Issues related to cross-correlation, spoofing or other methods of denial of service</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S19/215" definition-exists="false" ipc-concordant="G01S19/21" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/215</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>issues related to spoofing</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S19/22" definition-exists="true" ipc-concordant="G01S19/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multipath-related issues</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S19/23" definition-exists="true" ipc-concordant="G01S19/23" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/23</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Testing, monitoring, correcting or calibrating of receiver elements</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S19/235" definition-exists="false" ipc-concordant="G01S19/23" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/235</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Calibration of receiver components</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S19/24" definition-exists="true" ipc-concordant="G01S19/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Acquisition or tracking </text><CPC-specific-text><text>or demodulation</text></CPC-specific-text><text> of signals transmitted by the system </text><CPC-specific-text><reference><text>synchronisation aspects of direct sequence spread spectrum modulation <class-ref scheme="cpc">H04B1/7073</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S19/243" definition-exists="false" ipc-concordant="G01S19/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/243</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Demodulation of navigation message</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S19/246" definition-exists="false" ipc-concordant="G01S19/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/246</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>involving long acquisition integration times, extended snapshots of signals or methods specifically directed towards weak signal acquisition</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S19/25" definition-exists="false" ipc-concordant="G01S19/25" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/25</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>involving aiding data received from a cooperating element, e.g. assisted GPS</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S19/252" definition-exists="false" ipc-concordant="G01S19/25" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/252</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Employing an initial estimate of location in generating assistance data</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S19/254" definition-exists="false" ipc-concordant="G01S19/25" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/254</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>relating to Doppler shift of satellite signals</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S19/256" definition-exists="false" ipc-concordant="G01S19/25" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/256</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>relating to timing, e.g. time of week, code phase, timing offset</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S19/258" definition-exists="false" ipc-concordant="G01S19/25" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/258</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>relating to the satellite constellation, e.g. almanac, ephemeris data, lists of satellites in view</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S19/26" definition-exists="false" ipc-concordant="G01S19/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>involving a sensor measurement for aiding acquisition or tracking</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S19/27" definition-exists="false" ipc-concordant="G01S19/27" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/27</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>creating, predicting or correcting ephemeris or almanac data within the receiver</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S19/28" definition-exists="false" ipc-concordant="G01S19/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/28</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Satellite selection</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S19/29" definition-exists="false" ipc-concordant="G01S19/29" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S19/29</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>carrier </text><CPC-specific-text><text>including Doppler,</text></CPC-specific-text><text> related </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G01S19/246</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S19/30" definition-exists="false" ipc-concordant="G01S19/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/30</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>code related </text><CPC-specific-text><reference><text><class-ref scheme="cpc">G01S19/246</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S19/31" definition-exists="false" ipc-concordant="G01S19/31" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/31</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Acquisition or tracking of other signals for positioning</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S19/32" definition-exists="false" ipc-concordant="G01S19/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/32</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multimode operation in a single same satellite system, e.g. GPS L1/L2</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S19/33" definition-exists="false" ipc-concordant="G01S19/33" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/33</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Multimode operation in different systems which transmit time stamped messages, e.g. GPS/GLONASS</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S19/34" definition-exists="true" ipc-concordant="G01S19/34" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/34</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Power consumption</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S19/35" definition-exists="true" ipc-concordant="G01S19/35" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/35</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Constructional details or hardware or software details of the signal processing chain</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S19/36" definition-exists="true" ipc-concordant="G01S19/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>relating to the receiver frond end</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S19/37" definition-exists="true" ipc-concordant="G01S19/37" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/37</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Hardware or software details of the signal processing chain</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="G01S19/38" definition-exists="false" ipc-concordant="G01S19/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="G01S19/39" definition-exists="true" ipc-concordant="G01S19/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G01S19/39</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S19/393" definition-exists="false" ipc-concordant="G01S19/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G01S19/393</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>Trajectory determination or predictive tracking, e.g. Kalman filtering</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S19/396" definition-exists="false" ipc-concordant="G01S19/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G01S19/396</classification-symbol><class-title date-revised="2019-08-01"><title-part><CPC-specific-text><text>Determining accuracy or reliability of position or pseudorange measurements</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S19/40" definition-exists="false" ipc-concordant="G01S19/40" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/40</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Correcting position, velocity or attitude</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S19/41" definition-exists="false" ipc-concordant="G01S19/41" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/41</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Differential correction, e.g. DGPS [differential GPS]</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S19/42" definition-exists="false" ipc-concordant="G01S19/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/42</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Determining position</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S19/421" definition-exists="false" ipc-concordant="G01S19/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/421</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by combining or switching between position solutions or signals derived from different satellite radio beacon positioning systems; by combining or switching between position solutions or signals derived from different modes of operation in a single system</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S19/423" definition-exists="false" ipc-concordant="G01S19/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/423</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by combining or switching between position solutions derived from different satellite radio beacon positioning systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S19/425" definition-exists="false" ipc-concordant="G01S19/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/425</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by combining or switching between signals derived from different satellite radio beacon positioning systems</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S19/426" definition-exists="false" ipc-concordant="G01S19/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/426</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>by combining or switching between position solutions or signals derived from different modes of operation in a single system</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S19/428" definition-exists="true" ipc-concordant="G01S19/42" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/428</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using multipath or indirect path propagation signals in position determination</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S19/43" definition-exists="false" ipc-concordant="G01S19/43" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/43</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using carrier phase measurements, e.g. kinematic positioning</text></title-part><title-part><text>using long or short baseline interferometry</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S19/44" definition-exists="false" ipc-concordant="G01S19/44" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/44</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Carrier phase ambiguity resolution</text></title-part><title-part><text>Floating ambiguity</text></title-part><title-part><text>LAMBDA [Least-squares AMBiguity Decorrelation Adjustment] method</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S19/45" definition-exists="false" ipc-concordant="G01S19/45" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/45</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by combining measurements of signals from the satellite radio beacon positioning system with a supplementary measurement</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S19/46" definition-exists="false" ipc-concordant="G01S19/46" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/46</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the supplementary measurement being of a radio-wave signal type</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S19/47" definition-exists="true" ipc-concordant="G01S19/47" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S19/47</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the supplementary measurement being an inertial measurement, e.g. tightly coupled inertial</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S19/48" definition-exists="true" ipc-concordant="G01S19/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S19/48</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by combining or switching between position solutions derived from the satellite radio beacon positioning system and position solutions derived from a further system</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">G01S19/48</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">G01S5/01</class-ref>, <class-ref scheme="cpc">G01S5/011</class-ref>, <class-ref scheme="cpc">G01S5/012</class-ref>, <class-ref scheme="cpc">G01S5/013</class-ref>, <class-ref scheme="cpc">G01S5/014</class-ref>, <class-ref scheme="cpc">G01S5/015</class-ref>, <class-ref scheme="cpc">G01S5/016</class-ref>, <class-ref scheme="cpc">G01S5/017</class-ref>, <class-ref scheme="cpc">G01S5/018</class-ref>, <class-ref scheme="cpc">G01S5/019</class-ref>, and <class-ref scheme="cpc">G01S19/485</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S19/485" definition-exists="false" ipc-concordant="G01S19/48" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S19/485</classification-symbol><class-title date-revised="2020-05-01"><title-part><CPC-specific-text><text>whereby the further system is an optical system or imaging system</text></CPC-specific-text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S19/485</class-ref> is incomplete pending reclassification of documents from groups <class-ref scheme="cpc">G01S19/48</class-ref> and <class-ref scheme="cpc">G01S19/49</class-ref>.<br/>Groups <class-ref scheme="cpc">G01S19/48</class-ref>, <class-ref scheme="cpc">G01S19/49</class-ref>, and <class-ref scheme="cpc">G01S19/485</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S19/49" definition-exists="false" ipc-concordant="G01S19/49" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S19/49</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>whereby the further system is an inertial position system, e.g. loosely-coupled</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-source">Group <class-ref scheme="cpc">G01S19/49</class-ref> is impacted by reclassification into groups <class-ref scheme="cpc">G01S5/01</class-ref>, <class-ref scheme="cpc">G01S5/011</class-ref>, <class-ref scheme="cpc">G01S5/012</class-ref>, <class-ref scheme="cpc">G01S5/013</class-ref>, <class-ref scheme="cpc">G01S5/014</class-ref>, <class-ref scheme="cpc">G01S5/015</class-ref>, <class-ref scheme="cpc">G01S5/016</class-ref>, <class-ref scheme="cpc">G01S5/017</class-ref>, <class-ref scheme="cpc">G01S5/018</class-ref>, <class-ref scheme="cpc">G01S5/019</class-ref>, and <class-ref scheme="cpc">G01S19/485</class-ref>.<br/>All groups listed in this Warning should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S19/50" definition-exists="false" ipc-concordant="G01S19/50" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>G01S19/50</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>whereby the position solution is constrained to lie upon a particular curve or surface, e.g. for locomotives on railway tracks</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S19/51" definition-exists="false" ipc-concordant="G01S19/51" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/51</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Relative positioning</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S19/52" definition-exists="false" ipc-concordant="G01S19/52" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/52</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Determining velocity</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="G01S19/53" definition-exists="false" ipc-concordant="G01S19/53" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/53</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Determining attitude</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="G01S19/54" definition-exists="false" ipc-concordant="G01S19/54" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/54</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using carrier phase measurements</text></title-part><title-part><text>using long or short baseline interferometry</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="G01S19/55" definition-exists="false" ipc-concordant="G01S19/55" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S19/55</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Carrier phase ambiguity resolution</text></title-part><title-part><text>Floating ambiguity</text></title-part><title-part><text>LAMBDA [Least-squares AMBiguity Decorrelation Adjustment] method</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="G01S201/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G01S2201/00</classification-symbol><class-title date-revised="2019-08-01"><title-part><text>Indexing scheme relating to beacons or beacon systems transmitting signals capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G01S201/01" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G01S2201/01</classification-symbol><class-title date-revised="2019-08-01"><title-part><text>adapted for specific applications or environments</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G01S201/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G01S2201/02</classification-symbol><class-title date-revised="2019-08-01"><title-part><text>Indoor positioning, e.g. in covered car-parks, mining facilities, warehouses</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G01S201/025" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G01S2201/025</classification-symbol><class-title date-revised="2019-08-01"><title-part><text>Indoor pedestrian positioning</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G01S201/03" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G01S2201/03</classification-symbol><class-title date-revised="2019-08-01"><title-part><text>Construction sites</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G01S201/04" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G01S2201/04</classification-symbol><class-title date-revised="2019-08-01"><title-part><text>Emergencies</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G01S201/05" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G01S2201/05</classification-symbol><class-title date-revised="2019-08-01"><title-part><text>Sport</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G01S201/06" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G01S2201/06</classification-symbol><class-title date-revised="2019-08-01"><title-part><text>Aircraft navigation</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G01S201/07" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G01S2201/07</classification-symbol><class-title date-revised="2019-08-01"><title-part><text>Under water</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G01S201/08" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-08-01" status="published"><classification-symbol>G01S2201/08</classification-symbol><class-title date-revised="2019-08-01"><title-part><text>Marine or water borne applications</text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="true" level="6" additional-only="true" sort-key="G01S205/00" date-revised="2013-01-01" status="published"><classification-symbol>G01S2205/00</classification-symbol>
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<classification-item breakdown-code="true" not-allocatable="false" level="7" additional-only="true" sort-key="G01S205/00" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S2205/00</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Position-fixing by co-ordinating two or more direction or position line determinations</text></title-part><title-part><text>Position-fixing by co-ordinating two or more distance determinations</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G01S205/001" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2019-05-01" status="published"><classification-symbol>G01S2205/001</classification-symbol><class-title date-revised="2019-05-01"><title-part><text>Transmission of position information to remote stations</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G01S205/002" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S2205/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for traffic control, mobile tracking, guidance, surveillance or anti-collision</text></title-part></class-title>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G01S205/003" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S2205/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for aircraft positioning relative to the ground</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G01S205/005" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S2205/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for aircraft positioning relative to other aircraft</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G01S205/006" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S2205/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for emergency situations</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G01S205/007" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S2205/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for management of a communication system</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G01S205/008" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>G01S2205/008</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a mobile telephone network</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="8" additional-only="true" sort-key="G01S205/01" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S2205/01</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>specially adapted for specific applications</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S2205/01</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">G01S5/02</class-ref>.<br/>Groups <class-ref scheme="cpc">G01S5/02</class-ref> and <class-ref scheme="cpc">G01S2205/01</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G01S205/02" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S2205/02</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Indoor</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S2205/02</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">G01S5/02</class-ref>. <br/>Groups <class-ref scheme="cpc">G01S5/02</class-ref> and <class-ref scheme="cpc">G01S2205/02</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G01S205/03" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S2205/03</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Airborne</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S2205/03</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">G01S5/02</class-ref>. <br/>Groups <class-ref scheme="cpc">G01S5/02</class-ref> and <class-ref scheme="cpc">G01S2205/03</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G01S205/04" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S2205/04</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Nautical</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S2205/04</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">G01S5/02</class-ref>. <br/>Groups <class-ref scheme="cpc">G01S5/02</class-ref> and <class-ref scheme="cpc">G01S2205/04</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G01S205/05" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S2205/05</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Anti-theft or abduction</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S2205/05</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">G01S5/02</class-ref>.<br/>Groups <class-ref scheme="cpc">G01S5/02</class-ref> and <class-ref scheme="cpc">G01S2205/05</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G01S205/06" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S2205/06</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Emergency</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S2205/06</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">G01S5/02</class-ref>.<br/>Groups <class-ref scheme="cpc">G01S5/02</class-ref> and <class-ref scheme="cpc">G01S2205/06</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G01S205/07" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S2205/07</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Military</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S2205/07</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">G01S5/02</class-ref>.<br/>Groups <class-ref scheme="cpc">G01S5/02</class-ref> and <class-ref scheme="cpc">G01S2205/07</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G01S205/08" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S2205/08</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Sport</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S2205/08</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">G01S5/02</class-ref>. <br/>Groups <class-ref scheme="cpc">G01S5/02</class-ref> and <class-ref scheme="cpc">G01S2205/08</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="true" not-allocatable="false" level="9" additional-only="true" sort-key="G01S205/09" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S2205/09</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>for tracking people</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S2205/09</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">G01S5/02</class-ref>. <br/>Groups <class-ref scheme="cpc">G01S5/02</class-ref> and <class-ref scheme="cpc">G01S2205/09</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="true" not-allocatable="false" level="10" additional-only="true" sort-key="G01S205/10" definition-exists="false" ipc-concordant="CPCONLY" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2020-05-01" status="published"><classification-symbol>G01S2205/10</classification-symbol><class-title date-revised="2020-05-01"><title-part><text>Elderly or infirm</text></title-part></class-title><notes-and-warnings><note type="warning"><note-paragraph warning-type="reclass-destination">Group <class-ref scheme="cpc">G01S2205/10</class-ref> is incomplete pending reclassification of documents from group <class-ref scheme="cpc">G01S5/02</class-ref>. <br/>Groups <class-ref scheme="cpc">G01S5/02</class-ref> and <class-ref scheme="cpc">G01S2205/10</class-ref> should be considered in order to perform a complete search.</note-paragraph></note></notes-and-warnings></classification-item></classification-item></classification-item></classification-item></classification-item></classification-item></class-scheme> |