GPS Fix problem

Hi all,
I'm a developer for IGN France, I develop an app in Qt which uses Location API.
I really don't understand the GPS on the 5800 XpressMusic.
I explain, when I'm using the GPS, the first fix takes several time (10 to 20min), for the first fix, I know that's normal.
But if I turn off the GPS for 20min, the next fix take 10 to 20 min but not everytime...
And that happen with a clear sky, without any cloud...
All is done without the A-GPS activated because my app will be used in some place that you can't use A-GPS.
So why,for the second fix, it takes so long sometime and sometime it's very fast ?
Is there a config file which store some informations like others devices ?
Or all my customer must use A-GPS everytime they need the location ?
Thank for reply.

When the phone has a clear satellite signal it starts caching ephemeris data. This information will speed up future GPS locks, but the data expires relatively quickly (hence the name).
Help I'm trapped in a sig factory.

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uallaualla wrote:
Thank you for the response.
I'm sure the fix is faster if i use A-GPS, but i i have to pay for data connection.
And, above all, Sygic works perfectly WITHOUT A-GPS, so why Ovi Maps does not?
Yes, you have to pay, but the connection takes about 20sec. About Sygic you're right I noticed that too. It locks pretty fast.
‡Thank you for hitting the Blue/Green Star button‡
N8-00 RM 596 V:111.030.0609; E71-1(05) RM 346 V: 500.21.009

5230 GPS fix problem (have gps signal but no gps f...

hi
i have a nokia 5230
software version V20.0.005 / 23-03-2010
custom version 20.0.005.315.02 / 29-04-2010
type RM-588
not updated
CODE 0597862 - Latest available software for your device Version 20.0.005
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IntGPS = ON
BlueGPS = OFF
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I use the GPS only outdoors within open sky and hill/forest (not in urban, tall buildings). Usualy is clear sky or clouds, but not storms.
The Satellite info page displays me the satelite signals, and usually I have about 6-11 satelites bars and from them about 4-7 with more then 75% signal.It is very frustrating to have gps satelite signal and not have a gps fix. This is obvios a software related problem not a weak gps signal.
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My new 5230 takes ages to get a GPS fix. Nokia suggested the following. It seems to have given me route not found errors but I'm still testing. I reproduce Nokia's suggestion here it case it helps you...
We understand that you are having some issues with the GPS function of your Nokia 5230. In response to your concern, may we recommend that you power cycle your phone. Please follow the stepls below:
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Hey folks.
My Nokia C5-00 had serious trouble getting it's GPS to work. OVI Maps would NEVER (!) get a fix, I let it search for 2hrs for 3 times, it did not work.
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Cool thing - once you get a fix with the GPS Info app the OVI Maps gets its' automatically.
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I did some testing - getting a first fix with OVI Maps took longer than getting a fix with GPS Info launched in the background. And I am not talking about seconds, I am talking 3-5 minutes longer.
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1) make sure you have working internet connection in "Internet" in destination and it must be a "Priority Access point" in "Internet"
2) Install this application. it will lock GPS very fast (http://store.ovi.com/content/208256?clickSource=search&pos=7)
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4) Open you Maps application.. go to settings and set the Light timeout to "Always ON" and open Nokia Maps and keep somewhere safe from where it can see open sky.. (But is should be safe and should not fall down from window) .. Keep the Nokia maps application open with GPS fix for as long as possible or may be whole night.. it will drain whole battery at night with the gps fix ON.
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I don't recall any major changes a couple of months ago.
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I'm getting very interested in GPS problems across the iPhone range. Ive got a 3GS and the GPS satellite fix stopped working completely recently. A fix identified using jailbreak and an ssh terminal tells me a good proportion of these problems are with locationd, the gps process in the iPhone, or more accurately, I think that it's possible for some of the data this process uses to become corrupted; the "fix" involves stopping the process and deleting the data it uses. On restart, locations is forced to rebuild the data, and everything then works.
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Author: [email protected]
Date: 2008-11-19 14:53:40 -0800 (Wed, 19 Nov 2008)
Log Message:
Fixed problem with metadata in SelectionFormatTextStyles.as so that named colors work for selectionColor, unfocusedSelectionColor, and inactiveSelectionColor attributes on Gumbo components.
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QE Notes: None
Doc Notes: None
Bugs: SDK-18070
Reviewer: Glenn
Ticket Links:
http://bugs.adobe.com/jira/browse/SDK-18070
Modified Paths:
flex/sdk/trunk/frameworks/projects/flex4/src/mx/styles/metadata/SelectionFormatTextStyles .as
flex/sdk/trunk/frameworks/projects/wireframe/bundles.properties

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