GPS is stuck with a set of satellites - how to remove them from memory?

[chrispipe]

Originally Posted by ckl_88

Even so, sometimes I need to use Google Maps and get an approx location of my position right away because I don't time to wait 1-1.5 minutes for the GPS to get a real lock. Especially indoors when a real lock may take about 10 minutes.

Do you often find yourself indoors with no general idea of which building you walked into? If that is the case, then getting GPS working properly on your phone might be the least of your worries my friend. XD

[ckl_88]

Originally Posted by chrispipe

Do you often find yourself indoors with no general idea of which building you walked into? If that is the case, then getting GPS working properly on your phone might be the least of your worries my friend. XD

LOL. No, generally, I have an idea. But let's say I go to Toronto and visit a mall. I have no idea what's in the vicinity except what I can see in front of me. Now I would like to visit a park or find a hotel or restaurant... you get the idea. Now, if I start up Google Maps and it's got my last known location (which is Vancouver), I'd have to type in the address or name of the place that I'm in and hope to god that Google will find it, then do another search of what I'm looking for. Instead, if I say use GPS and it locates me via AGPS, then wouldn't that be better?

[chrispipe]

Originally Posted by ckl_88

LOL. No, generally, I have an idea. But let's say I go to Toronto and visit a mall. I have no idea what's in the vicinity except what I can see in front of me. Now I would like to visit a park or find a hotel or restaurant... you get the idea. Now, if I start up Google Maps and it's got my last known location (which is Vancouver), I'd have to type in the address or name of the place that I'm in and hope to god that Google will find it, then do another search of what I'm looking for. Instead, if I say use GPS and it locates me via AGPS, then wouldn't that be better?

I suppose. Google maps is often way off with location though. Sometimes almost 10km off for some people. I've had it go maybe 4 or 5km away from where I'm at, which in the search for a close restaurant, could make a big difference! The best thing to do in that case is to ask some locals! :P

But yeah I see what you're saying, I just wanted to be an ***. lol

-P

[rolandroland]

Originally Posted by chrispipe

I suppose. Google maps is often way off with location though. Sometimes almost 10km off for some people. I've had it go maybe 4 or 5km away from where I'm at, which in the search for a close restaurant, could make a big difference! The best thing to do in that case is to ask some locals! :P

But yeah I see what you're saying, I just wanted to be an ***. lol

-P

I agree on Google Maps, I find Live Search to better.

[DaveOke]

I've found that any setting I do in SURL AGPS has no effect on GPS performance.

After closing the GPS, one can see in the Debug screen that the GPS sats are not getting cleared... Seems like something that should be done when the GPS is closed.

Also, it seems the GPS receiver is ignoring Cold/Warm/Hot start commands in GPS viewer as well.

(I'm using 3.02 OMJ)

[tichi]

Originally Posted by DaveOke

I've found that any setting I do in SURL AGPS has no effect on GPS performance.

After closing the GPS, one can see in the Debug screen that the GPS sats are not getting cleared... Seems like something that should be done when the GPS is closed.

Also, it seems the GPS receiver is ignoring Cold/Warm/Hot start commands in GPS viewer as well.

(I'm using 3.02 OMJ)

there's another setting I did not know about metioned here:
http://forum.ppcgeeks.com/showthread.php?t=33156

"-Under HKLM/Software/HTC/SUPL AGPS added dword key "EnablePDEIPFromNV " and value of 1 "

I'm not sure what does it do...

[tichi]

for those interested, I've found a solution
(rather, a workaround) for the "stuck satellites" problem..
it is not new, in fact, and has been proposed to "fix standby issues":

http://forum.ppcgeeks.com/showthread.php?t=25407

"To get a GPS lock again reload the GPSID_QCT.dll. You can do this by using DOT Fred's Task manager, under Devices tab, and the device name is called GPD0."

this works fine for me....

it seems that GPS loses its sensitivity either due to standby or due to some other reason - the "stuck" satellites all have SignalToNoiseRatio
BELOW 30 dB (while for the lock one needs ABOVE 30 dB)..

reloading GPSID_QCT.dll helps GPS chip to find some satellites with SNR > 30 dB

voila..