Beidou-3 system officially opened. What are the main functions of Beidou-3 system?

Beidou-3 satellite navigation system provides two service modes: open service and authorized service.

Open service is to provide free positioning, speed measurement and time service in the service area. The positioning accuracy is10m, the timing accuracy is 50ns, and the speed measurement accuracy is 0.2m per second. Authorization service is to provide more secure positioning, speed measurement, timing and communication services and system integrity information for authorized users.

Construction objectives:

The construction goal of Beidou-3 satellite navigation system is to provide land, sea and air navigation and positioning services for military and civilian users in China and its surrounding areas, promote the application of satellite positioning, navigation and timing services, provide positioning and orbit determination means for space users, and meet the needs of weapon guidance and navigation and positioning information exchange.

Extended data

Functional features:

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. 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. ?

Engineering significance:

After Beidou provided global services, the confidence of all walks of life in applying Beidou doubled, and the Beidou industry was fully laid out. For example, business integration with traditional application fields such as transportation, agriculture, forestry, animal husbandry and fishery, electricity and energy has been deepening. At the same time, with the advent of the 5G commercial era, Beidou is accelerating its integration with new technologies such as next-generation communication, blockchain and artificial intelligence. New signals have also spawned new products. The 22nm integrated navigation and positioning chip supporting the new Beidou-3 signal is smaller in size, lower in power consumption and higher in accuracy, and has been applied on a large scale.

Baidu Encyclopedia-Beidou No.3 System