23-10-2009, 04:54 PM
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GPS, which stands for Global Positioning System, is the only system today able to show you your exact position on the Earth anytime, in any weather, anywhere. GPS uses satellite technology to enable a terrestrial terminal to determine its position on the Earth in latitude and longitude. GPS satellites, 24 in all, orbit 11,000 miles above the Earth. Ground stations located worldwide continuously monitor them. The satellites transmit signals that can be detected by anyone with a GPS receiver. Using the receiver, you can determine your location with great precision
