GPS was started as a project of the US military in 1958 and put into use in 1964. In 1970s, the United States army, navy and air force jointly developed a new generation of satellite positioning system GPS.

GPS can provide vehicle positioning, anti-theft, anti-robbery, driving route monitoring, call command and other functions. To achieve all the above functions, we must have three elements: GPS terminal, transmission network and monitoring platform.

Extended data:

The space part of GPS positioning system consists of 24 working GPS satellites, which together form a constellation of GPS satellites, of which 2 1 is a navigation satellite and 3 are active backup satellites.

These 24 satellites are distributed in six orbits around the earth with an inclination of 55. The operating period of the satellite is about 12 sidereal time. Every GPS working satellite will send out navigation and positioning signals. GPS users use these signals to work. It can be seen that the function of the satellite part of the GPS positioning system is to continuously send navigation messages.

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