ADS-B traffic picking up birds?

[GalinHdz]

Originally Posted by erich weaver

For tracks that are initiated with secondary radar, TIS-B will update the track if there is a momentary loss of secondary and only the primary is available.

This "coast" track will only be available for a few seconds, then the entire track is dropped.

Originally Posted by erich weaver

So I guess the bottom line is that non-transponder equipped aircraft wont usually show up as traffic?

You are correct.

[ClayR_9A]

So, It sounds like "non-transponder aircraft/birds" won't show up in the traffic feed at all.

[moosepileit]

From FAA FAQ: Does TIS-B broadcast primary radar?
For tracks that are initiated with secondary radar, TIS-B will update the track if there is a momentary loss of secondary and only the primary is available. For surface service volumes, TIS-B uplinks primary-only tracks because vehicles operating on airport surfaces may not be equipped with transponders or ADS-B Out.

A great geek out read. UND area study. Seems 10% of the time, even under ATC radar coverage by 2 stations, ADSB Altimetry errors can be reported up to 500'.

5 MB, 14 page pdf

https://www.google.com/url?sa=t&sour...lTSKvanAv5zlxx