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Interrogator
A ground-based surveillance radar beacon transmitter-receiver which normally scans in synchronisation with a primary radar. The interrogator transmits discrete radio signals which continuously request a reply from all transponders using the selected mode. The received replies are mixed with the primary radar returns and displayed on the same PPI (plan position indicator radarscope).
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- Part of Speech: noun
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- Industry/Domain: Aviation
- Category: Aeronautics
- Company: Aviation Supplies & Academics
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