Global Positioning System

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.

["Global Positioning by Satellite"? Precison? Coverage? Web

page?]

(1998-02-10)