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2007-12-08
, 00:31
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Posts: 11 |
Thanked: 0 times |
Joined on Oct 2007
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#12
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Originally Posted by YoDude
That seems to be the general experience.
Are folks saying that once they get a fix and use GPS on the 810, close whatever program and then come back to it after a time, it still takes several minutes to re-acquire?
[...]
If the GPS in the 810 goes cold when not used but the tablet is still on... then I'd say that was a problem that could be addressed by firmware revisions or even an add-on software solution.
Does it go cold if a program using it is left on in the background?
Then again, if someone NEEDs the GPS within 2 minutes of getting in the car, should they really be driving?
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2007-12-08
, 00:38
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Posts: 34 |
Thanked: 7 times |
Joined on Dec 2005
@ San Francisco
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#13
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Some factors to consider regarding the built-in GPS in the N810:
- The further away the current location is from the last location, the longer it takes the GPS to get a fix
- I get a fix a lot faster with my N810 when the battery is fully charged or when it is connected to the AC adapter
- There's no GSM radio or A-GPS, so there's no way to help the GPS get a fix using the location of nearby GSM towers (like on the N95)
- The further away the current location is from the last location, the longer it takes the GPS to get a fix
- I get a fix a lot faster with my N810 when the battery is fully charged or when it is connected to the AC adapter
- There's no GSM radio or A-GPS, so there's no way to help the GPS get a fix using the location of nearby GSM towers (like on the N95)
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2007-12-08
, 02:08
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Posts: 641 |
Thanked: 27 times |
Joined on Apr 2007
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#14
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Originally Posted by tnkgrl
I didn't know they did that. Neat!
Some factors to consider regarding the built-in GPS in the N810:
- The further away the current location is from the last location, the longer it takes the GPS to get a fix
- I get a fix a lot faster with my N810 when the battery is fully charged or when it is connected to the AC adapter
- There's no GSM radio or A-GPS, so there's no way to help the GPS get a fix using the location of nearby GSM towers (like on the N95)
__________________
Just because you are online, doesn't mean you don't have to form a full sentence.
SEARCH! It's probably already been answered.
Just because you are online, doesn't mean you don't have to form a full sentence.
SEARCH! It's probably already been answered.
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2007-12-08
, 02:16
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Posts: 5,795 |
Thanked: 3,151 times |
Joined on Feb 2007
@ Agoura Hills Calif
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#15
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I found the GPS lock time rather snappy on my OS2008-upgraded N800 a couple of days ago. I mainly tried it with Maemo Mapper, not the new mapping software.
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2007-12-08
, 17:35
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Posts: 610 |
Thanked: 391 times |
Joined on Feb 2006
@ DC, USA
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#16
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Originally Posted by crawdad
A GPS receiver can track signals at lower signal strengths than it can acquire them. So if you've acquired with a higher strength signal, it can keep tracking it when the signal gets weaker, but if you try to acquire under those same weaker conditions, it will fail to acquire.
Inside my house, it will NEVER get a lock, but if I bring the 810 inside already GPS-locked, the lock holds firm, rather than degenerating and breaking off as I would have expected.
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2007-12-08
, 19:15
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Posts: 3,841 |
Thanked: 1,079 times |
Joined on Nov 2006
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#17
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Originally Posted by YoDude
Interesting point - it could indeed be that it goes cold, the symptoms sounds like it. I didn't think of that. Stand-alone GPS units have a clock, and NVRAM to hold the last ephemeris data. Maybe the chipset in the N810 is so bare-bones that it doesn't have its own NVRAM? If so, then as you say, it should be reasonably easy to fix (unless the GPS chipset can't be fed ephemeris data from the N810.. that would be a major design flaw).
If the GPS in the 810 goes cold when not used but the tablet is still on... then I'd say that was a problem that could be addressed by firmware revisions or even an add-on software solution.
__________________
N800/OS2007|N900/Maemo5
-- Metalayer-crawler delenda est.
-- Current state: Fed up with everything MeeGo.
N800/OS2007|N900/Maemo5
-- Metalayer-crawler delenda est.
-- Current state: Fed up with everything MeeGo.
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2007-12-08
, 20:18
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Posts: 2,869 |
Thanked: 1,784 times |
Joined on Feb 2007
@ Po' Bo'. PA
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#18
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Originally Posted by TA-t3
It sounds like any program that accesses GPS when running in the background, will keep it hot.
Interesting point - it could indeed be that it goes cold, the symptoms sounds like it. I didn't think of that. Stand-alone GPS units have a clock, and NVRAM to hold the last ephemeris data. Maybe the chipset in the N810 is so bare-bones that it doesn't have its own NVRAM? If so, then as you say, it should be reasonably easy to fix (unless the GPS chipset can't be fed ephemeris data from the N810.. that would be a major design flaw).
I'm wondering how the unit reacts when a properly configured MaemoMapper is running and then the map program is opened. Does the program in the background give up the GPS to the newly opened program and vice versa when the focus is changed?
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2007-12-08
, 20:24
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Posts: 3,841 |
Thanked: 1,079 times |
Joined on Nov 2006
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#19
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The GPSD server talks to the GPS as an only application, it forwards data to anyone (e.g. Maemo Mapper). It should be able to feed data to Maemo Mapper, Wayfinder and e.g. a gps logging program at the same time (unlike when a program accesses a BT GPS directly. That could also be done via GPSD instead). If the GPS needs the GPSD for it to stay hot then it means that the GPSD must either be running 24/7, or, if possible, it should be able to instead store the last ephemeris on file and feed the GPS when it starts. (If it turns out to be true that the GPS chip doesn't have any way to hold on to it by itself).
__________________
N800/OS2007|N900/Maemo5
-- Metalayer-crawler delenda est.
-- Current state: Fed up with everything MeeGo.
N800/OS2007|N900/Maemo5
-- Metalayer-crawler delenda est.
-- Current state: Fed up with everything MeeGo.
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2007-12-08
, 23:03
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Posts: 18 |
Thanked: 1 time |
Joined on Sep 2006
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#20
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Didn't people complain massively about the lock time of the N95 when it first came out? (In fact, is the N95 8GB any better?)
Maybe Nokia are just rubbish at GPS? (I hope not as I was looking forward to using GPS on the N810...)
Maybe Nokia are just rubbish at GPS? (I hope not as I was looking forward to using GPS on the N810...)
What's the beef then?
Are folks saying that once they get a fix and use GPS on the 810, close whatever program and then come back to it after a time, it still takes several minutes to re-acquire?
Or are the complaints just about the time required for the initial, set-up fix?
For me the LD-3 stays in the car charging only when the ignition is on... so it is hot all the time. It is independent of the tablet.
If the GPS in the 810 goes cold when not used but the tablet is still on... then I'd say that was a problem that could be addressed by firmware revisions or even an add-on software solution.
Does it go cold if a program using it is left on in the background?