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Global Positioning System (GPS)
راژمان ِ نهشداد ِ جهانی
râžmân-e nehešdâd-e jahâni
Fr.: système de positionnement par satellites
A coordinate positioning tool, using a combination of satellites
that can rapidly and accurately determine the → latitude,
→ longitude, and the → altitude
of a point on or above the Earth’s surface. The GPS
is based on a constellation of 24 Earth-orbiting satellites at an
altitude of about 26,000 km. The system is a direct application of the thories of
→ special relativity and
→ general relativity.
See also: → global; → positioning;
→ system.
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