The full constellation was completed on March 9th, 1994. GPS receivers use triangulation of the GPS satellites' navigational signals to determine their location. GPS employs 24 spacecrafts, placed in 6 orbit planes. Since then, it has become an asset for civilian applications & industries around the globe. Department of Defense for the navigation needs of the military. 2 What is GPS? Global Positioning Program (GPS) was developed by the U.S.
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