On Thursday, May 7, 2015 at 12:20:41 PM UTC-5, wrote:

Uh no, to see all ADS-B traffic you just need to have receivers for both UAT and 1090ES, both transmit continuously whether or not there is other ADS-B traffic in the area. It is ADS-R from ground stations that may not be transmitted if there are no detected ADS-B out targets in the area.

Are you sure? As I understand it, unless you transmit ADS-B out, you will not get all the UAT ADS-B out traffic. You will only see them when a UAT ADS-B out is getting traffic info for all the traffic near him. And you have to be in range of a ground station.

Agree that with a 1090ES receiver (such as a PF), you will see all 1090ES traffic nearby - but not UAT-only ADS-B traffic.

Kirk
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