On Aug 17, 6:56*pm, Darryl Ramm wrote:
... In a PowerFLARM environment with lots of gliders also with
transponders what you want to do is correlate the Flarm ID of a glider
with it's transponder signal (and also extend that to ADS-B as well)
and suppress the PCAS warning for that glider. This in principle is be
easy to do for Mode S. You just have have the Flarm transmitter also
transmit the aircraft's Mode S ICAO ID). With Mode C you are pretty
much out of luck. The Flarm box is only going to be able to guess at
best. And there is the trade off between suppression a duplicate alert
and suppressing a real alert. It is so insurmountable that personally
I'd not bother trying if I was developing the box. And to be clear, I
have no idea what Flarm does inside their PCAS system in PowerFLARM.

Sorry I missed this earlier, to amplify one of Darryl's points...

You can set the aircraft ICAO ID in the FLARM config file,
in which case this is used instead of the distinct FLARM unit ID.

Hope that helps,
Best Regards, Dave