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What actually happens with GPS Sataus

 
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ngood94323
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Joined: Jan 30, 2006
Posts: 11
Location: West Midlands

PostPosted: Wed Mar 29, 2006 6:56 pm    Post subject: What actually happens with GPS Sataus Reply with quote

Hi, I have a query. When my BT GPS receiver connects I first of all see the bars in grey on the GPS ststus screen. After a min or so most of them change to blue onal a lock as accheived and my GPS location is found.
MY question is what is actually happening when they are grey and why does it take longer sometimes than others.
The software is working ok I am just wondering what is actually happening?

Can anyone fill me in please

Thanks
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mikealder
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Joined: Jan 14, 2005
Posts: 19638
Location: Blackpool , Lancs

PostPosted: Wed Mar 29, 2006 7:24 pm    Post subject: Reply with quote

The GPS unit is refining its position and while it cannot give an accurate position fix the bars are grey, this indicates that it can see and read data from at least some sats, once the unit (and the navigation package) are happy with the data and position fix the bars change colour and you are presented with your present position.
The time taken for this can vary considerably depending on a number of reasons, to name a few:
location (tall buildings mess up the field of view, as a simple example), or if the device has been moved a considerable distance switched off (trans atlantic).
The unit you have is working as it should be - Mike
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