On Aug 16, 5:22*pm, "noel.wade" wrote:
On Aug 16, 1:49*pm, wrote:

As I understand it, Power Flarm will incorporate ADS-B ( protocall not
completely clear to me) as well as transponder PCAS annunciation.

Here's a short Not-Totally-Technically-Accurate-But-Close-Enough
Explanation:

There are two "flavors" of ADS-B: *1090ES and UAT. *The 1090ES system
is more likely to be used by big/fast airplanes. *UAT is more likely
to be equipped on small GA aircraft. *PowerFLARM supports 1090ES. *It
does not support UAT or ground-based relays of traffic information
(according to the specs released so far). *So you'll see some ADS-B
aircraft with the PowerFLARM; but you won't necessarily detect _every_
ADS-B aircraft. *I believe that "some" ADS-B detection is better than
"none", especially when you add in the ability to see Mode C/S
transponders (when replying to radar pings) and other FLARM-equipped
gliders.

--Noel
(who will have a PowerFLARM this fall)

That looks like a pretty good explanation, but I'll clarify based on
what
I've digested from Darryl's excellent in-depth explanations. 1090ES
actually rides along with mode-S transponder replies, so if you have
a suitably equipped transponder (like the Trig) with the right flags
set,
you'll get informed by the ground transmitter of aircraft with UAT.
Plus, you'll know about any aircraft with 1090ES ADS-B, FLARM, or
mode A/C/S transponders (you'll only know altitude and distance to
those).

Given all that I'll be a PowerFLARM user as well (except it will be a
bit
longer for me to afford one), plus eventually the Trig.

-- Matt