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A comment on Preliminary Assessment: Unidentified Aerial Phenomena. Parent comment

Re:Preliminary Assessment: Unidentified Aerial Phenomena by trasz on Friday June 25, 2021 @05:18PM (#27636393)
144 _reported_ incidents. They also talk about how some of the cases going unreported. It would make sense to sieve through the radar data (I'd guess all the ATC radars are being recorded, because why not?) to look for those.
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Re:Preliminary Assessment: Unidentified Aerial Phenomena by nradov on Friday June 25, 2021 @05:24PM (#27636463)
Most ATC now uses secondary radars. Those generally only pick up aircraft carrying transponders.
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Re:Preliminary Assessment: Unidentified Aerial Phenomena by trasz on Friday June 25, 2021 @05:39PM (#27636602)
Good point. What about the radars used by Air Force to guard the airspace? Do they cover the interior, or only the borders?
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Re:Preliminary Assessment: Unidentified Aerial Phenomena by xxpor on Friday June 25, 2021 @05:43PM (#27636641)
Secondary radar == just an RX only antenna?
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Re:Preliminary Assessment: Unidentified Aerial Phenomena by nradov on Friday June 25, 2021 @06:07PM (#27636847)
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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Re:Preliminary Assessment: Unidentified Aerial Phenomena by tailspin2019 on Friday June 25, 2021 @05:21PM (#27636424)
Yep that's fair enough. And satellite imagery too I guess.
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