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A comment on ADS-B Exchange – Co-op of unfiltered flight data. Parent comment

Re:ADS-B Exchange – Co-op of unfiltered flight data by wglb on Tuesday February 18, 2020 @07:51PM (#22362043)
In my previous house, there were a large number of helicopters flying. Partly due to a tour company nearby. But the ADSB picked up very few of them.

I think in certain areas they have a different frequency for an ADSB equivalent.

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Re:ADS-B Exchange – Co-op of unfiltered flight data by dingaling on Wednesday February 19, 2020 @12:23AM (#22363232)
Not a different frequency, just a different protocol. Mode-S doesn't transmit position information so location can't be easily determined unless several receivers collaborate.
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Re:ADS-B Exchange – Co-op of unfiltered flight data by sandos on Wednesday February 19, 2020 @09:18AM (#22365577)
My receiver was mainly setup for MLAT where no mode-s is usable. Its works fairly well, but at times adsbx has had very bad receivers sending faulty MLAT data corrupting all the nearby tracks. But it seems to work well for now.
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