The Global Positioning System (GPS) is a satellite-based navigation system
made up of a network of 24 satellites placed into orbit by the U.S. Department of ...
http://en.wikipedia.org/wiki/Global_Positioning_System - 19 hours ago
. A GPS receiver calculates its position by precisely timing the signals sent
by GPS satellites high above the Earth.
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Public information about the U.S. Global Positioning System (GPS)
The Global Positioning System (GPS) is a U.S.-owned utility that provides users
with positioning, navigation, and timing (PNT) services. This system consists of ...
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When people talk about "a GPS," they usually mean a GPS receiver. The Global
Positioning System (GPS) is actually a constellation of 27 Earth-orbiting ...
The eight most important things you need to know about the GPS - Global
Positioning System. Learn about the satellites that orbit the earth and how, using
GPS or the Global Positioning System was invented by the U.S. Department of
Defense (D.O.D) and Ivan Getting, at the cost of twelve billion taxpayer dollars.