What are the four global positioning systems

What are the four global positioning systems

GPS system (USA)

The GPS system was developed by the United States since the 1970s. Its main purpose is to provide real-time, all-weather and global navigation services for the three major areas of land, sea and air. It is used for military purposes such as intelligence collection, nuclear explosion monitoring and emergency communications. Research experiments cost the US $ 30 billion. By 1994, 24 GPS satellite constellations with a global coverage rate of 98% had been installed.

2. Beidou System (China)

The Beidou satellite navigation system is a global satellite positioning and communication system developed by China itself. It is the third mature satellite navigation system after the US GPS global positioning system and Russian GLONASS. The system consists of space, ground, and user terminals.It can provide high-precision, high-reliability positioning, navigation, and timely service for all types of users around the world, all-day, and has short message communication capabilities. Area navigation, positioning and timing capabilities, positioning accuracy is better than 20m.

3.GLONASS system (Russia)

"GLONASS" GLONASS is a satellite positioning system similar to the US GPS system built by the former Soviet Union from the early 1980s, covering the entire surface of the earth and near-Earth space. It is also composed of satellite constellations, ground monitoring and control stations and users. The equipment consists of three parts.

4. Galileo Satellite Navigation System (EU)

The Galileo system has a total investment of 3.5 billion euros. The Galileo plan is an independent and independent civilian global satellite navigation system in Europe. It provides high-precision, high-reliability positioning services, achieves complete non-military control and management, and can cover global navigation. And positioning capabilities.