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ShareThe Global Positioning System, usually called GPS, is the Earth's only fully-functional satellite navigation system.
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A constellation of more than two dozen GPS satellites broadcasts precise timing signals by radio to electronic GPS receivers which allow them to accurately determine their location (longitude, latitude, and altitude) in real time.
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Note: This page refers to an article that is licensed under the GNU Free Documentation License. It uses material from the article Global Positioning System at Wikipedia.org. See the Wikipedia copyright page for more details.
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