The satellite constellation is managed by the United States Air Force 50th Space Wing. Other similar systems are the Russian GLONASS (operational as of 2010), the upcoming European Galileo positioning system, the proposed COMPASS navigation system of China, and IRNSS of India.ĭeveloped by the United States Department of Defense, GPS is officially named NAVSTAR GPS (Contrary to popular belief, NAVSTAR is not an acronym, but simply a name given by John Walsh, a key decision maker when it came to the budget for the GPS program). Utilizing a constellation of at least 24 Medium Earth Orbit satellites that transmit precise microwave signals, the system enables a GPS receiver to determine its location, speed, direction, and time. The Global Positioning System ( GPS) is the only fully functional Global Navigation Satellite System (GNSS). Civilian GPS receiver in a marine application.
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