[Paparazzi-devel] GPS 3G lock - but coordinates all zero

[Simon Liebold]

All,

Here a reminder to not rely on the green GPS status indicator in the GCS alone:

I went up yesterday in the belief that I had a good 3d lock. Up in the air with enough altitude (and good wind as well) I flipped the mode switch to AUTO2. Before I understood what was happening the plane was out of sight. I believe kill mode activated at some point.

Luckily, I found it again after a 30 minute search and 600m further (see attachment). Just minor damage.

I had updated the ublox (LEA-6H) to its newest firmware and must have set something incorrectly. It took quite a while to get a GPS "lock" and the log is showing:

11270.388 1 GPS 0 0 0 0 0 0 0 1783 53717750 0 1 (before "fix")
11271.455 1 GPS 3 0 0 0 0 0 0 1783 53718750 0 2 (after acquiring the "fix", 3g mode(!))

So, always verify that it is showing the correct position on the map of the GCS as well!

Simon

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