Abstract:
The GPS is a worldwide radio navigation system formed from a constellation of 24 satellites and their ground stations. GPS uses these "manmade stars" as reference points to calculate the positions accurate to a matter of meters. In fact, with advanced forms of GPS you can make measurements to better than a centimeter! In a sense it is like giving every square meter on the planet a unique address, the system was designed for and is operated by the U. S. military. GPS is funded by and controlled by the U. S. Department of Defense (DOD). While there are many thousands of civil users of GPS world wide. GPS has mainly 3 parts the space segment, the user segment and the control segment. They are collectively called as GPS Elements.
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