GPS field trips

Marcus Bauer marcus.bauer at
Wed Apr 16 10:34:52 CEST 2008

On Wed, 2008-04-16 at 03:45 -0300, Werner Almesberger wrote:

> I also have a few GTA01 and HXD8 laying around, but they're not in a
> state fit for quick GPS testing.

My GTA01 at roof-top conditions generally gets a fix in <60s, time in

However, the altitude calculation is broken, it seems gllin has no idea
of the separation of the geoid and WGS84 ellipsoid.

                                          the 48.4m are this separation.

They are not calculated from satellite data. The gllin seems to
calculate some garbage value there <1m. Thus altitude is ~48.4m too high
where I live.


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