View Single Post
Old 10-23-2012, 03:56 PM   #6 (permalink)
pshute
Talking BlackBerry Encyclopedia
 
Join Date: Jul 2005
Model: 9800
OS: 6.0.0.706
Carrier: Optus
Posts: 253
Post Thanks: 1
Thanked 3 Times in 3 Posts
Default Re: 9790 - poor GPS performance - is it only me?

Quote:
Originally Posted by Dubdub View Post
If it has been 7 or more days since you last used GPS, the device needs to download the ephemeris table first so it knows where to look for which satellites.
I never knew that. Any idea how long that should take, and where it downloads it from? Do dedicated GPSs do this, e.g. Garmin with no SIM?
Quote:
If you have moved a considerable distance from the last use, it also takes a few minutes to locate the satellites and determine your position.
I didn't know that either. If both these things are correct then it sounds like irregular users of the GPS function should plan to use it at least until it gets a fix the day before they need it, and perhaps daily if they're travelling.

My 9800 is usually ok, can even get a fix indoors sometimes, but is occasionally erratic. I don't use it regularly, so this might explain some of its behaviour.
Offline   Reply With Quote