On Aug 18, 10:04*am, jcarlyle wrote:
Vacation made me late for this thread. Mike Schumann was curious if
any Trig transponders were "interfaced with a GPS navigation source
and being used for ADS-B out", and Darrl thought that there was one in
a glider, in addition to the FAA installation.

I've had my Trig TT21 flying with 1090ES data-out for just over a
year. The GPS source is my Volklogger, and the GPS Integrity Level is
set to Low. The VFR transponder check verified that squitters were
being sent.

I plan to have the Trig's firmware upgraded soon, so it'll be possible
to turn on the 1090ES data-in capability bit. That way, when my
PowerFLARM arrives, I'll be set to look at ADS-B traffic around me -
and also set to receive TIS-B traffic when PowerFLARM updates their
firmware in the summer of 2011.

-John

I thought the only disadvantage of 1090ES vs UAT was that the former
couldn't receive TIS-B traffic. If it's true then why wouldn't the
ultimate future-proofed solution be a TT21/22 and a PowerFlarm. You
can get them both within a few months and the will provide the best
coverage through the transition. That plus with 1090ES being
mandatory in 2020 for big iron you have optimal solutions against the
two scariest threats (other gliders because of the density and
proximity issues in remote locations and airliners because hitting one
of those is a buzz-kill for the whole sport). At the same time you get
PCAS to cover all the slow adopters. Plus you get integration into
glider nav systems and glider-specific collision modeling.

What did I miss?

9B