Artwork of Global Positioning Satellite orbits

Artwork of Global Positioning Satellite orbits

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Credit: ESA/CE/EUROCONTROL/SCIENCE PHOTO LIBRARY

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Caption: Global Positioning System. Artwork of the orbits of the Navstar satellites used in the Global Positioning System (GPS). The GPS system uses a constellation of 24 operational Navstar satellites in 6 orbital planes, ensuring that 3-6 satellites are above the horizon at any location at any one time. Small ground-based receivers calculate the user's position by measuring the time it takes for signals to arrive from the satellites. Military receivers have an accuracy of a few metres, whilst the degraded signals intended for civilian use give an accuracy of less than 100 metres.

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Keywords: global positioning system, gps, gps satellite orbits, military, military navigation, navigation satellite, navstar satellite orbit, satellite, satellites

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