4g lte car gps tracking refers to the Global Positioning System. It refers to the Global Positioning System (GPS) that uses satellites to conduct real-time positioning and navigation on a global scale. GPS positioning system function must have GPS terminal, transmission network and monitoring platform three elements; These three elements are indispensable; Through these three elements, it can provide vehicle anti-theft, anti-robbery, driving route monitoring and call command and other functions.

The GPS positioning system consists of 24 GPS working satellites, of which 21 are available for navigation and 3 are active spare satellites. Each GPS working satellite sends out signals for navigation and positioning. GPS users use these signals to do their work.

The control part of the GPS positioning system is composed of a monitoring system distributed in the world by a number of tracking stations, which are divided into master control stations, monitoring stations and injection stations according to their different roles. The function of the main control station is to calculate the satellite ephemeris and satellite clock correction parameters according to the GPS observation data of each monitoring station, and inject these data into the satellite through the injection station; At the same time, it also controls the satellite, issues instructions to the satellite, when the working satellite fails, dispatch the standby satellite to replace the failed working satellite; In addition, the main control station also has the function of a monitoring station. The function of the injection station is to inject the satellite ephemeris and clock corrections calculated by the main control station into the satellite.

The user part of GPS positioning system consists of GPS receiver, data processing software and corresponding user equipment such as computer meteorological instruments. Its role is to receive the signals sent by GPS satellites, and use these signals for navigation and positioning.

The above three parts together constitute a complete GPS positioning system.

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