Global Positioning System (GPS)
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- This is an Article about the Global Positioning System (GPS) in general. For an introduction to the Garmin GPS receiver see Garmin GPS.
Sattelite navigation systems are used for three-dimensional positioning on the surface of the earth. In contrast to other methods of mensuration or positioning, no fixed points on the earth's surface are used as reference points, but satellites circling in the earth's orbit.
