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Re: gps question
There are sattelite based isp's, but GPS satellites are completely different. Basically GPS satellites send a signal and your phone (in this instance) recieves those signals. A gps unit must have a fix on several satellites at one time (at least three). It takes the information recieved from those signals and by triangulation calculates where you are on the earth. The more satellite signals it is recieving the more accurate the calculation. With 4 or more GPS signals you can get altitude info. You aren't sending info to the GPS satellites all the work is being done by your unit.
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