Improved interrogation side-lobe suppression

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Term Improved interrogation side-lobe suppression
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Definition

A technique whereby interrogation pulse P1 is transmitted via both the main beam and the control beam of the SSR antenna, so that a transponder in a side-lobe direction more reliably receives a P1-P2 pulse pair.

Definition Source

ICAO (2004) doc. 9684 Manual of the Secondary Surveillance Radar (SSR) Systems

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