I'm on JF3
Just ran the satellite checker app and I can get 5 satellites in my living room, whereas my HTC Touch HD couldn't find one. Outside I get another 2, and it gives me 13.6ft accuracy overall. Averages 3-5 used out of 7-odd, but it does randomly spazz out and say accuracy = 600ft for a fraction of a second.
Just ran the satellite checker app and I can get 5 satellites in my living room, whereas my HTC Touch HD couldn't find one. Outside I get another 2, and it gives me 13.6ft accuracy overall. Averages 3-5 used out of 7-odd, but it does randomly spazz out and say accuracy = 600ft for a fraction of a second.
Been running tests all evening, and its a mess. The Galaxy just wont hold a stable signal on any satellite, so position bounces between 30 to 500ft. The HTC HD and HD2 have consistent stable signals. Even fired up my old Dell Axim, and even that works properly.
*sigh*
I'm on firmware version XXJF3, which as I understand it is the only firmware released on UK phones.
I can see what the problem is clear as day. The phone will only lock on a satellite if its signal strength holds above 22 or so and since they all bounce between 12 to 28, it never maintains a consistent signal.
I'm not sure if we make the GPS chip inside the Galaxy S, we make a lot of them but I'll see if I can get someone on the phone on monday and get their take on it all.
*sigh*
I'm on firmware version XXJF3, which as I understand it is the only firmware released on UK phones.
I can see what the problem is clear as day. The phone will only lock on a satellite if its signal strength holds above 22 or so and since they all bounce between 12 to 28, it never maintains a consistent signal.
I'm not sure if we make the GPS chip inside the Galaxy S, we make a lot of them but I'll see if I can get someone on the phone on monday and get their take on it all.
Really?
When i checked before i got a lock on 3 sattelites with signal between 17-19
I think it's a software problem rather than a hardware one.
The device does see enough sattelites, with strong enough signal, just usually doesn't even try to lock on them.
When i checked before i got a lock on 3 sattelites with signal between 17-19
I think it's a software problem rather than a hardware one.
The device does see enough sattelites, with strong enough signal, just usually doesn't even try to lock on them.
Can you post a pic from GPS Test, with the phone locking on satellites below 20.
Thanks.
I have flashed the JF5 firmware on my phone and the GPS quality improved drastically. The GSP sensor is still kind of picky at times, but at least the accuracy jumps are history.
P.S. The firmware was never officially released — I got mine from samsung firmwares website, these guys have some connections to samsung employees and thus get their hands on unreleased firmware.
To be sure is working you need to use something like GPS Test. If you just run maps it will use cell towers and wifi too. So may look like its working better than it really is.
Although for every one of us with a problem, there seems to be another with GPS working fine.
Sent from my GT-I9000 using XDA App
Although for every one of us with a problem, there seems to be another with GPS working fine.
Sent from my GT-I9000 using XDA App
Agree.... The GPSTest app is great in what it does...... just a shame the Galaxy S performs nowhere near as good as my HD2 and the older HD.
pinoypower
Senior Member
mine is working great. It finds me in no time. The navigation is a lot smoother than my Tomtom XL Live, I don't like the voice though. Can this be changed at all? Can't find an option to do this....
Sent from my GT-I9000 using XDA App
Sent from my GT-I9000 using XDA App
Actually, from the spec's it does look like one of ours, namely the InCrystal 20751, with GPS/BT3/FM support. So anything I did learn I wouldnt be able to share anyway.
It's not 22, the Samsung Galaxy S won't lock onto anything of 20 SnR or below unlike HTC Desire/G1 etc.
If you see a grey bar in "GPS Test", that is not a lock on, that is just "I can see this satellite".
The current XXJF3 software seems intent on only using upto 8 satellites, even though you may see 11 all with a good signal, you will only ever use 8.
I wonder if this is half of the problem, it cannot use all the satellites it sees, so when there's a bad signal from a couple in one direction, you lose your lock and it has to try to work frantically to establish a lock elsewhere.
Does XXJF5 allow a lock to more than 8 satellites? Does it open up use to Signal Strength of 20 or below?
If you see a grey bar in "GPS Test", that is not a lock on, that is just "I can see this satellite".
The current XXJF3 software seems intent on only using upto 8 satellites, even though you may see 11 all with a good signal, you will only ever use 8.
I wonder if this is half of the problem, it cannot use all the satellites it sees, so when there's a bad signal from a couple in one direction, you lose your lock and it has to try to work frantically to establish a lock elsewhere.
Does XXJF5 allow a lock to more than 8 satellites? Does it open up use to Signal Strength of 20 or below?
For those whose GPS is working fine, we need to know I think what your baseband version is, and whether you rebooted your phone prior?
I seem to get a better signal after a reboot. Better, but not perfect.
I must admit as well, you need to walk around the block and see what happens.
Although I think those of us with GPS problems will see problems when stationery, sometimes, you do get a strong lock on. But walk around a bit, and the thing gets confused. If you take a look at the Sky Map or Satellite Position maps in GPS Test et al, you will the direction "North" bounce around all over the place.
I seem to get a better signal after a reboot. Better, but not perfect.
I must admit as well, you need to walk around the block and see what happens.
Although I think those of us with GPS problems will see problems when stationery, sometimes, you do get a strong lock on. But walk around a bit, and the thing gets confused. If you take a look at the Sky Map or Satellite Position maps in GPS Test et al, you will the direction "North" bounce around all over the place.
Hmm, this is interesting. Have just tried it again, and now it can see 8 and locks to 8, but the weather has changed in the past couple of hours as the temperature has dropped and its clouded over, so from I have just seen, I wonder if atmospherics have something to do with it.
I too am facing some problem with getting a proper GPS lockon. Even after finding an open spot and spending couple of minutes searching for my destination, the phone still encounters problem getting a proper lockon. Sometimes it took a restart of the navigation app and turning off and on of the GPS receiver before it can finally get proper lock on the satellites.
Does it got anything to do with the phone design or firmware issue?
Does it got anything to do with the phone design or firmware issue?
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11[video] Bluetooth GPS and SGS GPS compared
...
OK, I've made a video: the SGS is mounted in my car (real condition - normal usage scenario)
At the beginning I'm parked and then I drive in town.
As I'm in town, there are some buildings and the car has an athermal windscreen so the satellite signal reception is not very good. However the GPS is still usable (you can see that sometime the accuracy of the bluetooth GPS drops briefly...).
In this test the red mark is the current position reported by an old bluetooth SIRF III GPS and the green mark corresponds to the signal of my Galaxy S (I9000) internal GPS.
The blue circles represent the accuracy reported for each GPS. The mark size is approximately 5 to 10 meters and the map is centred on the bluetooth GPS.
As I was in the car I can say that the bluetooth GPS position was quite accurate...1
For the bluetooth GPS, I'm using BlueGPS4Droid which works pretty well with my BT-338. I have configured it to redirect the bluetooth GPS on its own GPS provider. So the internal GPS and the bluetooth GPS are both available at the same time
I'm using ShootMe (Screen Grabber) developed by Johan Cloetens.
How can I compare both GPS, if I use a app that tempers the GPS data ?
No misunderstanding, that's fine... but not for this particular purpose.
On the other hand, I prefer also to use open data (OpenStreetMap) and open source software when I can...
Since Samsung's last official Froyo update, the GPS of my SGS (July version) doesn't last more than 5 minutes after the first fix. So it's barely usable even with a very good navigation app (another of the many problems I have with my SGS GPS...).
Except that (and the lack of notification led) it's a great phone.
