On Thursday, February 14, 2019 at 7:01:23 AM UTC-6, Dan Daly wrote:

I had my altimeter checked and calibrated about a year ago, so I am very confident in its accuracy, as opposed to the GPS altitude. However, without a transponder, is there any record anywhere to prove that I have NOT busted airspace floors or ceilings? If I post an OLC claim with my Oudie, where is my proof that the Oudie altitude trace is wrong? Who is going to take my word about my altimeter on any given flight?

Roy

@Roy - your PowerFLARM Portable is cal'd to the ISA and that's what it records. See the approval doc at http://www.ukiws.demon.co.uk/GFAC/ap...powerflarm.pdf
Some he "...1.6 Pressure altitude sensor. AMS 5540 or MS 5607 Pressure Altitude sensor by MEAS Switzerland SA, formerly Intersema Sensoric SA (www.meas-spec.com) is fitted. This is compensated for temperature variation and calibrated to the ICAO ISA. It is shown in the header record of IGC files in the form: "HF PRS PressAltSensor: MEAS MS5607". The recorder case is not pressure-sealed and "cockpit static" pressure is recorded on the IGC file."

Your PowerFLARM sends pressure altitude to your Oudie2 (mine did before I changed and now my ClearNav vario does). Set up an info box with it. It will diverge from the altimeter setting on your altimeter and the GPS altitude but let you know how you are doing wrt Class A. I don't understand why your Oudie is set to alarm for GPS altitude. Oudie2 Lite running XC Soar doesn't (I assume when you say Oudie you mean SeeYou Mobile?).
Dan

Dan,
Yes my Oudie2 runs on SeeYou. I bought it about 5 years ago and connected it to the portable FLARM with the Oudie2 cables. My Oudie2 altitude trace, as filed on OLC, has always shown the GPS altitude. That was one reason why I had my altimeter re-calibrated ($500). Perhaps there's a setting or "switch" for the pressure altitude output, which I'm supposed to configure in the FLARM and/or the Oudie2??
I'll have to check that out in the glider, if and when spring ever arrives.

Also: Other users claim that their Oudie shows flarm targets on the Oudie display. Mine has never done that. I asked Dave Springford about that a few years ago, and he sent me a copy of the configuration file to make that work. But mine was already set that way. So I'm lost.

Thanks!
Roy