User profile for user: beyond net
beyond net Author
User level: Level 1
10 points

Turn off Assisted-GPS

Does anyone know how to turn off assisted-GPS, so it use satellite GPS only?

Posted on Jul 14, 2008 5:00 AM

Reply
11 replies
Sort By: 
User profile for user: neuroanatomist
neuroanatomist
User level: Level 9
50,445 points

Jul 14, 2008 7:22 AM in response to jbrandonf18

Yes, I know that. But I don't believe that the OP does - which is why I posed the question. Assisted-GPS does use satellite GPS, but uses cell/WiFi to speed up the time to first fix, and to establish a location based on two visible satellites (instead of the normally required 3 satellites). I can't think of any reason one would want to deactivate the "assistance." in any case, it's not possible to do that on the iPhone.
Reply
User profile for user: MobileDev
MobileDev
User level: Level 3
565 points

Jul 20, 2008 1:23 PM in response to neuroanatomist

Assisted-GPS does use satellite GPS, but uses cell/WiFi to speed up the time to first fix, and to establish a location based on two visible satellites (instead of the normally required 3 satellites).


A-GPS is about getting assistance information on what satellites are in view, and their orbits, and/or help with calculations and accounting for atmospheric and local conditions.

Cell id and WiFi have nothing to do with A-GPS. They can be used as aids in locating, however.
Reply
User profile for user: MobileDev
MobileDev
User level: Level 3
565 points

Jul 20, 2008 5:41 PM in response to jlindh

AGPS can also deal with propagation and refraction delays caused by the atmosphere, and multipath reflections in cities.

DGPS, intended to correct the same kind of errors, is a different (and unidirectional) method of assistance mainly intended for maritime, non-cellular, devices. And of course WAAS is an extension for aerial navigation.
Reply

This thread has been closed by the system or the community team. You may vote for any posts you find helpful, or search the Community for additional answers.

Turn off Assisted-GPS

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple Account.
Learn more Sign up