thoughts on A-GPS offline

[mqy]

>From [
http://www.u-blox.cn/customersupport/gps.g5/ublox5_Fw5.00_Release_Notes(GPS.G5-SW-08019).pdf
]:

"
UBX-AID-EPH and UBX-AID-ALM Messages for Satellite without valid Orbits
When polling UBX-AID-EPH or UBX-AID-ALM messages, satellites without valid
ephemeris or almanac data will 
return a complete UBX-AID-EPH or UBX-AID-ALM message with all data words set
to zero. This doesn’t comply 
with the protocol specification. Furthermore, u-blox 5 receivers with
firmware V5.00 and earlier can run into a 
floating-point exception when fed with such “empty” ephemeris. 
"

Is that the cause :D


Daniel Willmann wrote:
> 
> 
> Yes and that's what ogpsd does already. It has been saving/restoring
> almanac for months, ephemeris was disabled up until recently because
> there was a bug that prevented the GPS chip from doing anything useful
> after they were restored to the chip.
> 
> ... ...
> 
> Regards,
> Daniel Willmann
> 
>  
> _______________________________________________
> Openmoko community mailing list
> community at lists.openmoko.org
> http://lists.openmoko.org/mailman/listinfo/community
> 
> 

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