I agree with Random. I have always been under the impression that to receive a GPS signal, you need line-of-sight with the satellites. Any metal (e.g. car roof, "urban canyons") and water (e.g. foliage) obstructing the line would interrupt the signal. Have they really gotten around that limitation with GPS receivers? Cell triangulation I'd believe is very possible, but GPS is a bit of a stretch to me and I have questioned this before in an earlier article.
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James @ Dec 19th 2005 1:38AM
I agree with Random. I have always been under the impression that to receive a GPS signal, you need line-of-sight with the satellites. Any metal (e.g. car roof, "urban canyons") and water (e.g. foliage) obstructing the line would interrupt the signal. Have they really gotten around that limitation with GPS receivers? Cell triangulation I'd believe is very possible, but GPS is a bit of a stretch to me and I have questioned this before in an earlier article.