4G GPS Tracker.The principle of GPS positioning

　　With the continuous development of science and technology, GPS measurement technology has been widely applied in land surveying and mapping. Compared with other measurement technologies, GPS measurement technology has strong anti-interference ability, extremely strong stability, and extremely high confidentiality performance, revolutionizing traditional land surveying and mapping technology and promoting the rapid development of land surveying and mapping industry.

　　The Global Positioning System (GPS) is the full name for GPS. In actual use, it is necessary to use positioning satellites to measure distance, which forms the Global Positioning System. When implementing positioning functions, the distance between the satellite and the receiver is used as the basis. When the receiver receives the information returned by the satellite, the carrier phase can be used to measure the actual distance, and combined with corresponding calculation methods, the time required for the signal to be transmitted to the receiver can be calculated, And determine the three-dimensional coordinates of the user.

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What are the functions of the GPS positioner? The principle of GPS positioner?