How is the GPS system composed?

GPS system consists of space part, control part and user part. Details are as follows:

1, blank part

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.

2. Control part

The control part of GPS positioning system consists of several tracking stations distributed all over the world. According to their different functions, these tracking stations are divided into main control station, monitoring station and injection station.

3. User part

The user part of GPS positioning system consists of GPS receiver, data processing software and corresponding user equipment such as computer meteorological instruments.

Characteristics of extended data global positioning system;

1, global all-weather positioning

The large number and uniform distribution of GPS satellites ensure that at least four GPS satellites can be observed at any time anywhere on the earth, and ensure the realization of global all-weather continuous navigation and positioning services (except lightning is not suitable for observation).

2, the positioning accuracy is high

The application practice proves that the relative positioning accuracy of GPS can reach 10-6 meters in the range of 50 kilometers, 100-500 kilometers, 10-7 meters and 1000 kilometers.

3, the observation time is short

With the continuous improvement of GPS system and the continuous update of software, the relative static positioning within 20km only takes15-20min.

Baidu encyclopedia-global positioning system