Global Positioning System

GPS is a navigation system that gives our exact location on earth at any time and anywhere. It is a high precision tracking system that provides accurate location coordinates mapping even the remotest of locations. Though it was initially designed, developed and controlled by the U.S. department of defense for its military purposes, it soon became available for the civil users worldwide. This navigation system covers the entire surface on earth using 24 satellites (and 3 additional) that orbit around it at a height of 11,000 nautical miles. [The Aerospace Corporation]. Ground stations based in five different locations on earth receive signals transmitted by these satellites and send data, which are used to monitor and control the satellites. Considered a revolutionary breakthrough in the field of navigation, this technology is finding newer applications everyday. A brief overview would provide us a better insight into the subject.

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