Secondary radar == just an RX only antenna? | Hacker News

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		xxpor on June 25, 2021 \| parent \| context \| favorite \| on: Preliminary Assessment: Unidentified Aerial Phenom... Secondary radar == just an RX only antenna?

nradov on June 25, 2021 [–]

Transmitter also, but not powerful enough to get a useful return from an aircraft without a transponder at any significant range.

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