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#1
September 22nd 04, 06:16 AM
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And you would be satisfied if the GPS only worked where there is cell phone
coverage? "William W. Plummer" wrote in news  v34d.653$He1.339@attbi_s01: Satellites are great for coverage but they are expensive to maintain ( $1B per year). Would it be possible to use all those cell phone towers as GPS extensions, providing wide area coverage and increased accuracy? The satellite constellation would serve as the "backbone" which provides accurate time and position information to all those cell phone towers, but within range, the cell phone towers will provide much more accurate location info. 
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#2
September 22nd 04, 08:00 AM
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I get 30 miles out of town and my cell phone is toast...
BT "Andrew Sarangan" wrote in message 58... And you would be satisfied if the GPS only worked where there is cell phone coverage? "William W. Plummer" wrote in news v34d.653$He1.339@attbi_s01: Satellites are great for coverage but they are expensive to maintain ( $1B per year). Would it be possible to use all those cell phone towers as GPS extensions, providing wide area coverage and increased accuracy? The satellite constellation would serve as the "backbone" which provides accurate time and position information to all those cell phone towers, but within range, the cell phone towers will provide much more accurate location info.
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#3
September 22nd 04, 08:01 AM
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the west is still wild...
BT "BTIZ" wrote in message news:ly84d.106328 I get 30 miles out of town and my cell phone is toast... BT "Andrew Sarangan" wrote in message 58... And you would be satisfied if the GPS only worked where there is cell phone coverage? "William W. Plummer" wrote in news v34d.653$He1.339@attbi_s01: Satellites are great for coverage but they are expensive to maintain ( $1B per year). Would it be possible to use all those cell phone towers as GPS extensions, providing wide area coverage and increased accuracy? The satellite constellation would serve as the "backbone" which provides accurate time and position information to all those cell phone towers, but within range, the cell phone towers will provide much more accurate location info.
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#4
September 22nd 04, 02:52 PM
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"BTIZ" wrote in message news:ly84d.106328$yh.29283@fed1read05... I get 30 miles out of town and my cell phone is toast... ....on the ground. Get a few thousand feet of altitude on things and the coverage gets MUCH better.
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