If I need to make a portable device which you can carry around with you to give the exact location, altitude, climb and descent.
What electronic chips hardware will i need to make a portable GPS system?
Is there a need to make a payment to some company to use GPS?



With all the cheap GPS devices around why make your own?http://cheapgpsdevices.com/
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No, you don’t need to pay anyone to use the GPS satellite signals
Directions for making your own GPS receiver:http://www.gpsreview.net/homemade-gps-re…