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Computing (FOLDOC) dictionary (also found in English - English (Wordnet), )
Global Positioning System
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communications (GPS) A system for determining postion on the
Earth's surface by comparing radio signals from several
satellites. When completed the system will consist of 24
satellites equipped with radio transmitters and atomic clocks.
Depending on your geographic location, the GPS receiver
samples data from up to six satellites, it then calculates the
time taken for each satellite signal to reach the GPS
receiver, and from the difference in time of reception,
determines your location.