How are GPS Systems Useful?
The GPS tracking systems have been very useful for people to find their way on land and on water, in keeping track of people, vehicles, pets etc, in scientific studies, for map making, land surveying and countless other commercial uses. Everyday new applications are being found for the amazing NAVSTAR GPS commonly known as GPS systems.
Bascially you need a gps receiver to receive and decode the signals that are continuously being sent by the 24 satellites orbiting the earth. The gps system has been designed in such a way that any point of time your gps receiver on earth receives signals from at least 4 satellites. This is essential for to determine your exact location on Earth.
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