GPS problems, summary

Al Johnson openmoko at mazikeen.demon.co.uk
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 gmail.com>:
> > 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 
download)?




More information about the community mailing list