GPS satellites

　　GPS satellites. The space part of GPS consists of 24 satellites distributed in 6 equal interval orbits. The satellites are more than 20000 kilometers away from the earth. This distribution can ensure that any part of the world is covered by 4 satellites at any time. The satellite of GPS can provide the high-precision three-dimensional information of the target in any coverage area, that is, speed, location and time information, to an unlimited number of users all weather and continuously.

　　GPS ground support system. The ground monitoring part consists of a monitoring system composed of several tracking stations distributed around the world. According to their different functions, these tracking stations are divided into master control station, injection station and temporary control station. The ground monitoring system of GPS working satellite consists of 1 master control station, 3 injection stations and 5 global monitoring stations.

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