"Flarm, no GPS"

On Friday, July 3, 2015 at 9:38:17 AM UTC-7, JS wrote:
On Friday, July 3, 2015 at 8:40:05 AM UTC-7, wrote:
I have the same problem. I just turned down the voice volume to 0. A better solution would be nice.
Dale

The GPS rx threshold for these messages seems too low. I've had the same message in the Air vario while using one antenna for three devices. The other devices were perfectly happy.
Incrementally tilting the instrument panel up will provide the message before other devices lose GPS.
Personally wouldn't turn the messages down, no longer use FLARM visual displays.
Jim

More to this, of more general interest.

I flew today and got some extended periods of "no GPS" warnings. Again the IGC file looks ok, but there are the "GPS 0 0" messages where I was getting the voice warnings. I then overlaid the flight logs from the Flarm and the Triadis logger in Seeyou, and it is obvious that in fact the Flarm does not have a fix, and is merely filling in interpolated fixes after the fact to generate a straight line between the valid ones. This is quite obvious in SeeYou. Looking at yesterday's traces, same thing. Looking at some traces from last year, they overlay exactly. In the SeeYou graph, you can display fix accuracy and see it as well, large intervals of essentially no accuracy.

So something has gone wrong with my Flarm, either the firmware update or winter storage has caused it to be unreliable. If you did not recognize this, you would turn in a file at a contest and get short changed because corners are cut. Or maybe the scoring software would throw it out.