GPS
GPS
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GPS

navigation
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Also known as: Global Positioning System
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GPS satellite
GPS satellite
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Key People:
Gladys West
Related Topics:
navigation satellite Navstar Global Positioning System radio navigation
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GPS, in full Global Positioning System, space-based radio-navigation system that broadcasts highly accurate navigation pulses to users on or near Earth. In the United States’ Navstar GPS, 24 main satellites in 6 orbits circle Earth every 12 hours. In addition, Russia maintains a constellation called GLONASS (Global Navigation Satellite System), and in 2007 the European Union approved financing for the launch of 30 satellites to form its own version of GPS, known as Galileo, which began operations in 2016. China launched two satellites in 2000 and another in 2003 as part of a local navigation system first known as BeiDou ...(100 of 1654 words)

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