Tell the system position on the earth"s surface. Based on the calculation of clock frequency sent from orbiting satellites around the earth, which know difficultly. Make this system can tell the position at the point it can get the signal around the world. The GPS receiver, which is the device used to track car. "GPS Tracking" and various objects that It can calculate the speed and the direction is used together with the program map. For use in a vehicle tracking system or equipment, and can be used to guide.
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