The global satellite navigation system includes

Global satellite navigation system includes Beidou satellite navigation system in China, global positioning system in the United States, GLONASS in Russia and Galileo in the European Union.

1, Beidou satellite navigation system

Beidou Satellite Navigation System (BDS) consists of 35 satellites, including 5 geosynchronous orbit satellites and 30 medium-circular orbit satellites. Beidou system uses principles similar to GPS, GLONASS and Galileo to determine the position of the receiver by measuring the distance between the receiver and the satellite.

2. Global Positioning System (GPS) in the United States

The GPS system consists of 24 working satellites, which are distributed in different orbits and rotate around the earth at different speeds. These satellites will emit a radio wave called GPS signal, which contains the position and time information of satellites. The GPS receiver can receive the signal from the satellite and determine its position through calculation.

3. GLONASS satellite navigation system in Russia.

GLONASS system consists of 24 satellites, which are distributed in different orbits and rotate around the earth at different speeds. GLONASS system uses the principle similar to GPS to determine the position of the receiver by measuring the distance between the receiver and the satellite.

4. EU Galileo satellite navigation system.

Galileo system consists of 30 satellites, which are distributed in different orbits and rotate around the earth at different speeds. Galileo system uses principles similar to GPS and GLONASS to determine the position of the receiver by measuring the distance between the receiver and the satellite.

Characteristics of Beidou system:

The practice of Beidou system construction has stepped out of the development path with China characteristics, rapidly formed its service capacity in the region and gradually expanded its service to the whole world, enriching the development mode of satellite navigation in the world.

Beidou system has the following characteristics: the space segment of Beidou system adopts a mixed constellation composed of three kinds of orbiting satellites. Compared with other satellite navigation systems, Beidou system has more high-orbit satellites and strong anti-occlusion ability, especially in low latitudes.

Beidou system provides navigation signals with multiple frequency points, and through the joint use of multi-frequency signals, the service accuracy can be improved. Beidou system innovatively integrates navigation and communication capabilities, and has multiple service capabilities such as positioning and navigation timing, satellite-based enhancement, ground-based enhancement, precise single point positioning, short message communication, international search and rescue, etc.

Baidu Encyclopedia-Global Navigation Satellite System