Global Positioning System
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British Dictionary definitions for global positioning system
Scientific definitions for global positioning system
Cultural definitions for global positioning system
A U.S. military satellite system now available for public use that allows those with a GPS receiver to locate their position on the surface of the Earth to within a few feet. A constellation of twenty-four satellites orbits the Earth, each of which transmits a radio signal giving both location of the satellite and the time of the transmission. Triangulation of three separate signals is then used by the receiver to determine its position on the Earth's surface.