Topic Review (Newest First)
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| 16-06-2008 12:07 PM |
| shoobe01 |
> meaning that when between buildings you need to see a quarter of the clear sky when getting a lock.
Um, not necessarily. The satellites move around constantly so are not evenly spaced. Sometimes very close together*, sometimes far apart, mostly somewhere in between. Receivers are increasingly tolerant of multi-path reception, so you can get /some/ signal off bounce, from hard surfaces like cliffs and buildings.
*Although this causes another issue, called geometric dilution of position
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| 11-06-2008 08:58 AM |
| Rafe |
Use O2 Mobile Web
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| 11-06-2008 08:52 AM |
| Unregistered |
My N82 gets a lock in less than 20sec every single time. Sometimes almost instantaneously. It's really good for me so far.
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| 11-06-2008 08:51 AM |
| Nigma |
Satellites whizzing around at thousands of miles an hour?... I think not!... these satellites are in geo-stationary orbit for a reason...They do not move relative to the surface.
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| 11-06-2008 08:51 AM |
| sapporobaby |
Quote:
Originally Posted by bartmanekul
Your probably right about accuracy, but in all the satnav apps Ive used (over 6), its not had any accuracy issues.
When I say outperforms, I mean get a faster lock (which it does, with AGPS). It beats my mates tomtom with a sirf 3.
Of course, Id rather have sirf 3, but you must make concessions with mobiles, and for my purposes, its always been better than a sirf 3. And probably better for most the population, unless they need to the meter accuracy, and satnav indoors.
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Cheers mate,
I agree with you there. Concessions had to be made and the SIRFstar III is no sweetheart when it comes to power usage. It can be a bit hungry but that is the price you pay for sensativity. I have a Tom Tom for the car and I can agree with you here. For some reason the Tom Tom has a very long TTFF (about a min or more), but once locked on it stays locked. The idea of A-GPS would not be a bad idea for Tom Tom as many to most units have the ability to connect to a cell phone. Hey, let's propose this. We can split the royalites on the idea. 
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| 11-06-2008 07:47 AM |
| bartmanekul |
Your probably right about accuracy, but in all the satnav apps Ive used (over 6), its not had any accuracy issues.
When I say outperforms, I mean get a faster lock (which it does, with AGPS). It beats my mates tomtom with a sirf 3.
Of course, Id rather have sirf 3, but you must make concessions with mobiles, and for my purposes, its always been better than a sirf 3. And probably better for most the population, unless they need to the meter accuracy, and satnav indoors.
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| 11-06-2008 06:33 AM |
| sapporobaby |
clarification
@bartmanekul,
I meant performance in terms of tracking, i.e. 3 meters with my Colorado verses 8 meters with my N82 while standing in the same spot. There is simply no way your 6110 can out perform a SIRFstar III equiped receiver. The military uses SIRFstar III receivers. I also have a Garmin GPSMap60CSx, and too out performs my N82. In terms of tracking, maintaining a lock, TTFF, a dedicated unit is simply better than a GPS equipted phone. Can you verify where you got the impression that your 6110 is better than a dedicated unit? With either Garmin device I can routinely get 4 to 5 satellite while indoors.
While I will admit that having my N82 is sometimes a bit more handy than having my Garmins with me, I would not trust my N82 for any serious navigation (off road or geocaching), but it is adequate for simple tasks such as traveling in the city.
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| 11-06-2008 01:44 AM |
| King Mustard |
Which do you recommend I use for the positioning server?:
- O2 MMS
- O2 Mobile Web
- O2 WAP GPRS
- O2 WAP GPRS Streaming
Cheers guys.
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| 10-06-2008 06:57 PM |
| Unregistered |
You can get a cheap GPS bluetooth receiver for £20.
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| 10-06-2008 01:29 PM |
| dj123 |
thanks a lot. greatly speeded up my gps lock. and thanks to the comment on positioning server too.
I use my 6110 for lots of navigation and getting aGPS working was really annoying me.
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| 10-06-2008 11:45 AM |
| bartmanekul |
Quote:
Originally Posted by Unregistered
@bartmanekul,
I have a Garmin Colorado 300 which is probably one of the best if not the best handheld GPS on the market and I have a Nokia N82. The Colorado easily ourperforms the N82. I have gotten a 3m lock with the Garmin. The best the N82 can get is about 8. It does not have the sensativity or the processing power. In short, you are simply wrong. The N82 is great but the SIRFstar III is the king of the hill currently.
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3 and 8 minutes?
Perhaps you mean seconds?
If Im in the same place I switched it off, its instant lock.
If Im somewhere new, lock is generally under 30 seconds.
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| 10-06-2008 11:35 AM |
| SamCritch |
Quote:
Originally Posted by snoyt
GPS needs satellite positional and satelite time data. These tables are encode in the GPS signal and repeated every 60 seconds. AGPS can support these location data as well as computing power. With AGPS enabled en internal GPS disabled only the AGPS datatables are used for positioning. When GPS is also enabled the phone might check for local GPS datatables first saving on internet data. Cellbased location has a separate toggle in the firmware.
So I'd suggest when on a cheap internet connection set GPS off and AGPS on, when roaming set AGPS off? Hmmm, damn why is there no AGPS roaming switch?
Hey Nokia here is another for my firmware update;-)
The support section is nice, but I was hoping for a user contributed wikipedia with some administrating ;-) This would allow for accellerated growth.
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Thanks for this, I think that's the clearest explanation I've heard of how it works....
Sam
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| 10-06-2008 11:32 AM |
| SamCritch |
Quote:
Originally Posted by krisse
Are you sure you're not just seeing the AGPS fix (which isn't really GPS)? If that's good enough for your needs then you wouldn't really need a GPS phone at all, you might as well go for a cheaper model.
Indeed, it's an interesting idea that GPS might not be needed any more if our phone can locate us from phone masts alone.
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I think this is pretty confusing. Assisted GPS still uses the GPS receiver, I can still see the number of satellites visible. It just downloads ephemeris data (positions of GPS satellites in the constellation) to allow the phone to get a much faster fix, whereas "integrated GPS" doesn't do this. At least, that's my understanding.
So, how can you have A-GPS turned on at the same but "integrated GPS" turned off. Surely the labelling needs to be improved?
BTW I'm using our own GyPSii app to upload and share photos/videos with location. Mobile download here. Apologies for the plug. ;-)
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| 10-06-2008 11:11 AM |
| Unregistered |
No way
@bartmanekul,
I have a Garmin Colorado 300 which is probably one of the best if not the best handheld GPS on the market and I have a Nokia N82. The Colorado easily ourperforms the N82. I have gotten a 3m lock with the Garmin. The best the N82 can get is about 8. It does not have the sensativity or the processing power. In short, you are simply wrong. The N82 is great but the SIRFstar III is the king of the hill currently.
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| 10-06-2008 09:47 AM |
| pintofale |
@aatifsumar
A length of wire works well as an FM antenna - if fact it's hard to fold one up into the size of the handset, which is why you need the headset connected. But a GPS antenna is a small helical coil, an either must be very noise free (i.e. no audio signals in the linking cable, so you can't use earphones on the same wire) or needs a bias voltage for the LNA, which would mean running power out on the cable, requiring more pins. I think the external antenna is best satisfied by using a bluetooth one with a separate battery - I believe Steve once mentioned a tiny one which fits on a keyfob. This might be a nice way to get better performance and also save your phone battery! This option will obviously become more attractive when the next generation GPS chipsets become available late next year - if I still have my E90, that is...
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