Global Positioning System (GPS)

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Global Positioning System (GPS)

A system involving the use of satellite technology to calculate an accurate three-dimensional position. A GPS system consists of a space segment (up to 24 NAVSTAR satellites in 6 different orbits), the control segment (5 monitor stations, 1 master control station and 3 upload stations), and the user segment (GPS receivers). NAVSTAR satellites carry extremely accurate atomic clocks and broadcast coherent simultaneous signals.

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