The abbreviation of China Beidou satellite navigation system is

China Beidou satellite navigation system is referred to as BDS.

Beidou system is the English name of Beidou satellite navigation system and the general name of China's satellite navigation system. At present, the construction process of compass can be divided into two stages. The first stage is the test system, that is, Beidou satellite navigation test system, also known as double-star positioning system, or active positioning system, because it realizes center positioning through two-way communication.

Since 2005, China has implemented a new generation of satellite navigation system, which is similar to the international GPS/GLONASS/ Galileo system and is called passive positioning system. The receiver receives the navigation signal of satellite broadcast, and the receiving terminal realizes positioning.

The system is expected to form a constellation of 12 satellites from 20 1 1 to 20 12, which can cover the regional service capacity of China and its surrounding areas and will be expanded to serve the whole world according to the situation and demand before 2020.

Its global constellation consists of 35 satellites, including 5 geostationary orbit (GEO) satellites, 3 geosynchronous tilted orbit (IGSO) satellites and 27 medium earth orbit (MEO) satellites.

System characteristics

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: First, 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. Secondly, Beidou system provides navigation signals with multiple frequency points, and the service accuracy can be improved through the joint use of multi-frequency signals.

Third, the 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, and international search and rescue.

Baidu Encyclopedia-Beidou Satellite Navigation System