GPS problems, summary

Al Johnson openmoko at
Thu Jul 17 10:29:14 CEST 2008

On Thursday 17 July 2008, Kai Römer wrote:
> Hi people,
> 2008/7/16 Marcus Bauer <marcus.bauer at>:
> > With the help of AGPS you can shorten it probably to 15 seconds.
> I have heard this for about thousand times now. NO! Never got those
> values. TTFF with AGPS is about 38 secs without AGPS about 48 secs
> good condition.
> Tested with 6 OM in Germany. (about 50 Tests per device)
> I am just telling, bc i dont want anyone to expect too much.

That time difference looks like the ~10s it was taking to find time when I 
tested without SD. Were you using just time and location estimate, or 
providing almanac and ephemeris too? If so what was their source (local or 

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