What is the second step of the "three-step" development route of Beidou satellite navigation system?

The second step of the "three-step" development route of Beidou satellite navigation system is to build Beidou satellite navigation system.

China attaches great importance to the construction and development of Beidou system. Since the 1980s, we have been exploring the development path of satellite navigation system suitable for China's national conditions, and formed a "three-step" development strategy: by the end of 2000, Beidou-1 system will be built to provide services for China; By the end of 20 12, Beidou-2 system will be built to provide services for the Asia-Pacific region; In 2020, the Beidou-3 system will be built to serve the whole world.

As of 2065438+September 2009, there are 39 satellites in orbit of Beidou satellite navigation system. Since the end of 20 17, the construction of Beidou-3 system has entered ultra-high density launch. Beidou system officially provides RNSS service to the whole world, with 39 satellites in orbit.

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Development characteristics

The construction practice of Beidou system has realized the rapid formation of service capacity in the region, gradually expanded the development path of serving the world, and enriched the development mode of world satellite navigation. ?

Firstly, the space segment of Beidou system adopts a mixed constellation composed of three kinds of orbiting satellites. Compared with other satellite navigation systems, there are more high-orbit satellites with stronger 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.

Thirdly, Beidou system innovatively integrates navigation and communication capabilities, and has five functions: real-time navigation, quick positioning, accurate timing, position reporting and short message communication service.