Ok I really missed what I wanted to say: One of my friends told me some phones have positioning sistems that are quite unaccurate: they should be based on cells but have no GPS. He also told me it was "AGPS that uses only GSM to get information about position". Next time I will document better instead of just listen to friends :P Sorry for the big mistake
2008/6/23 Marcus Bauer <[EMAIL PROTECTED]>: > On Mon, 2008-06-23 at 10:25 +0200, Federico Lorenzi wrote: >> This seems to be really misunderstood. The GPS is the Freerunner can >> get a fix with no help whatsoever, it'll just take longer. This is >> where the AGPS can come in. Download some data off an assistance >> server, and suddenly your time to fix is much less. There have been >> posts to this mailing list about it. > > My experience with the Freerunner is ~12 minutes TTFF (time to first > fix) without use of agps and ~4-8 minutes TTFF with agps from > agps.u-blox.com using the software from openmoko. > > The Neo1973 (GTA01) had a TTFF without agps assistance of ~2 min. > > However, the freerunner shows correct altitude above geoid whereas the > Neo1973 shows only height above WGS-84 ellipsoid. Depending on your > location the difference between WGS-84 and geoid introduces an error > from -102m to +86m towards your real altitude. > > > > > > _______________________________________________ > Openmoko community mailing list > [email protected] > http://lists.openmoko.org/mailman/listinfo/community > _______________________________________________ Openmoko community mailing list [email protected] http://lists.openmoko.org/mailman/listinfo/community
