thoughts on A-GPS offline
meng.qingyou at gmail.com
Sun Mar 1 21:57:30 CET 2009
U-blox receiver allows polling AID-EPH, AID-ALM data.
For each type, we can poll 32 messages for 32 satellites.
The precondition is: current fix is valid -- at least 3 SVs has valid EPH(or
These data get invalid 2~4 hours later,
can be stored into files, and load into GPS receiver when needed and they
I've tried this, not sure whether it works or not, need more tests:)
AGPS-online works fine.
Raphaël Jacquot wrote:
> On Sun, Mar 01, 2009 at 08:31:16PM +0100, Daniel Willmann wrote:
>> Now that hot-/warmstart with ephemeris playback works with the framework
>> we should try to get an open server with aiding data available ASAP.
> is there a way to get the ephemeris data from the gps receiver at some
> point ?
> it could be stored on the phone and used as a calculation aide...
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