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
