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mightyyid
Pocket GPS Verifier
Joined: Apr 04, 2006
Posts: 83
Location: Melbourne, Australia
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 Posted: Sat Jan 16, 2010 7:19 am Post subject: Quick GPS Fix- I'm intrigued |
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Ok, chaps, know how it works but wondered whether it works on a date system or some other means. For example, I downloaded cameras on a Fri night and at the same time use home for updates. TT Home gives me a new GPFx file and all is good.
I connect on a Sunday night and it offers me another one. So therefore I wonder if the actual file is updated once week, every day or randomly? In other words, is there an optimum date and time download a new file?
Thanks
Andy |
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253
Lifetime Member
Joined: Mar 05, 2007
Posts: 1058
Location: The green bit between the M40, M4 and M25.
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| Posted: Sat Jan 16, 2010 9:39 am Post subject: |
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Must admit I thought it was every time you connect TT Home.
I'm only saying that because that's what happens to me.
Also when I boot up the TT, say the following day after a GPS fix update, it still always goes to my 'Home' even though I could be 170 miles from there - which I usually am.
To be honest i don't pay much attention to it
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Triumph Tbird 1700. And now a Bonnie T100. |
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dhn
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Joined: Oct 08, 2007
Posts: 2544
Location: Toronto CANADA
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| Posted: Sat Jan 16, 2010 2:54 pm Post subject: |
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The gpsquickfix files are normally offered on a daily basis.
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David |
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Andy_P
Pocket GPS Moderator
Joined: Jun 04, 2005
Posts: 19991
Location: West and Southwest London
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| Posted: Sun Jan 17, 2010 12:10 am Post subject: |
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| dhn wrote: | | The gpsquickfix files are normally offered on a daily basis. |
... but as each download contains information about the satellites for several days ahead (I think it's 7 days), there's no point in downloading it every day.
In fact, it's only really of any use if you don't use the TomTom very often. If you use it every day, there's probably no point in downloading the GPSQuickfix files at all. |
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dhn
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Joined: Oct 08, 2007
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Location: Toronto CANADA
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| Posted: Sun Jan 17, 2010 2:37 am Post subject: |
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I was just asking the specific question as to how frequently it was offered, Andy. I didn't elaborate on the usefulness of accepting a daily download. 
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David |
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Andy_P
Pocket GPS Moderator
Joined: Jun 04, 2005
Posts: 19991
Location: West and Southwest London
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| Posted: Sun Jan 17, 2010 3:11 am Post subject: |
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Sorry David, although I quoted you, I was actually trying to answer the last part of mightyyid's original question:
| Quote: | | In other words, is there an optimum date and time download a new file? |
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DennisN
Tired Old Man
Joined: Feb 27, 2006
Posts: 14902
Location: Keynsham
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| Posted: Mon Jan 18, 2010 12:32 am Post subject: |
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I last downloaded it in February 2007 (about the time we decided it was a bit flakey and/or unnecessary). Can't remember which device it was for, but certainly none of the ones I have today. Home has given up on me and hasn't even offered it for a very long time.
The longest I can recall not using any device is a long weekend.  I tell a lie - I don't use them when I'm on holiday in Corfu for two weeks. Whatever! I don't have problems getting satellite fixes.
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Dennis
If it tastes good - it's fattening.
Two of them are obesiting!! |
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fluke9
Lifetime Member
Joined: Apr 21, 2006
Posts: 68
Location: SE London
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| Posted: Mon Jan 18, 2010 1:20 pm Post subject: |
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I have found without regular updates it can take an age to get a fix.
And I use mine daily.
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TTGO730
App 8.351 (9982/090518) OS:315187
GPS v1.20, Boot 5.5120
Map WCE 845.2645
iPhone 4S 3 (Contract)
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Dave. |
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DennisN
Tired Old Man
Joined: Feb 27, 2006
Posts: 14902
Location: Keynsham
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| Posted: Mon Jan 18, 2010 2:58 pm Post subject: |
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| fluke9 wrote: | I have found without regular updates it can take an age to get a fix.
And I use mine daily. |
Are you driving off before you get a fix?
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Dennis
If it tastes good - it's fattening.
Two of them are obesiting!! |
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DaveMatthews
Regular Visitor
Joined: Dec 25, 2004
Posts: 221
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| Posted: Mon Jan 18, 2010 4:19 pm Post subject: |
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I'm intrigued, too! What actual information do the GPS-Fix files contain? Given that the sats are geostationary, presumably it's not positional information as this should only change when a particular one is retired and replaced.
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Cheers,
Dave |
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MrT
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Joined: Nov 14, 2003
Posts: 2143
Location: Surrounded by A1, M1 & M25
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| Posted: Mon Jan 18, 2010 4:31 pm Post subject: |
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| DaveMatthews wrote: | | I'm intrigued, too! What actual information do the GPS-Fix files contain? Given that the sats are geostationary, presumably it's not positional information as this should only change when a particular one is retired and replaced. |
When did all the GPS satelites become geostationary? This questions some fundamental principles on how they stay in certain orbits.
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PaulB2005
Pocket GPS Moderator
Joined: Jan 04, 2006
Posts: 9323
Location: Durham, UK
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| Posted: Mon Jan 18, 2010 4:34 pm Post subject: |
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| Some are, some aren't... Click Here |
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fluke9
Lifetime Member
Joined: Apr 21, 2006
Posts: 68
Location: SE London
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| Posted: Mon Jan 18, 2010 5:20 pm Post subject: |
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| DennisN wrote: | | fluke9 wrote: | I have found without regular updates it can take an age to get a fix.
And I use mine daily. |
Are you driving off before you get a fix? |
Nope, always start from the same place (On the drive) after say 6 days it can take up to 8 mins to get a fix, once GPS Fix update loaded less than 30 seconds.
This has been the same for all the TT's I have had.
Also I have an HTC PDA in the car (I am a mini cab driver) which is never updated GPS wise that can take up to 20 mins to get a fix.
_________________
TTGO730
App 8.351 (9982/090518) OS:315187
GPS v1.20, Boot 5.5120
Map WCE 845.2645
iPhone 4S 3 (Contract)
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Dave. |
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DaveMatthews
Regular Visitor
Joined: Dec 25, 2004
Posts: 221
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| Posted: Mon Jan 18, 2010 7:28 pm Post subject: |
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| MrT wrote: | | DaveMatthews wrote: | | I'm intrigued, too! What actual information do the GPS-Fix files contain? Given that the sats are geostationary, presumably it's not positional information as this should only change when a particular one is retired and replaced. |
When did all the GPS satelites become geostationary? This questions some fundamental principles on how they stay in certain orbits. |
Ooops - my mistake. And thanks to PaulB2005 for posting that link.
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Cheers,
Dave |
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DennisN
Tired Old Man
Joined: Feb 27, 2006
Posts: 14902
Location: Keynsham
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| Posted: Mon Jan 18, 2010 8:55 pm Post subject: |
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| fluke9 wrote: | | DennisN wrote: | | fluke9 wrote: | I have found without regular updates it can take an age to get a fix.
And I use mine daily. |
Are you driving off before you get a fix? |
Nope, always start from the same place (On the drive) after say 6 days it can take up to 8 mins to get a fix, once GPS Fix update loaded less than 30 seconds.
This has been the same for all the TT's I have had.
Also I have an HTC PDA in the car (I am a mini cab driver) which is never updated GPS wise that can take up to 20 mins to get a fix. |
Well I guess you need to move house!! (but before doing that I'd try parking facing in a different direction). I have three TTs and an HTC Advantage X7510. I switch on the HTC first cos I load two programs into Win Mobile, then the TTs. Then I start "Navigate to" on the TTs whilst the HTC gets the first program going, part of which requires GPS lock. By the time I finish setting all four going, they've all acquired satellite lock and I have TomTom navigating for my departure. Very occasionally, I'll set off before getting them all going and in those circumstances they'll take up to a quarter of a mile to lock on.
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Dennis
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