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Old 12-09-2012, 02:48 PM   #18
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we have to remember that in order to acquire a signal the vehicle has to be in direct line of sight with at least three of the satellites. If it can not triangulate your location, it will not be able to give you an accurate location. Hence when driving downtown in a city, those buildings are blocking the direct signal (signal cannot penetrate buildings) and initially it may provide feedback to your screen but as someone mentioned when you stop and then restart the car, it is not able to acquire the signal and you will be without GPS until you are in an area. Yes mount Everest would give you the best signal as you are receiving from all 28 or so satellites.
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