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Why is China Beidou proud of global networking?
All 30 networking satellites of Beidou Global Networking are in place. Beidou-3 global satellite navigation system constellation has been deployed. At 9: 43 today, the 55th Beidou navigation satellite developed by the Fifth Academy of China Aerospace Science and Technology Corporation was successfully launched in xichang satellite launch center. This is the third geosynchronous orbit satellite of Beidou-3 global satellite navigation system. With the satellite in the "big chess game" of Beidou-3 global networking, all 30 networking satellites of Beidou-3 are in place, and the deployment of Beidou-3 global satellite navigation system constellation is fully completed.
Why should China Beidou be proud of the completion of the deployment of Beidou-3 global satellite navigation system constellation? Contribute to "China Plan", highlight "China Wisdom", create "China Speed" and provide "China Precision"? Embrace the whole world, Beidou shares China's "miracle" with the world. China Beidou, the pride of China people!
Three highlights of Beidou-3: 1: The inter-satellite link technology of the constellation has realized infinite connectivity. Because China's Beidou system can't establish a ground station in the world like American GPS, in order to solve the data transmission channel of overseas satellites, the Beidou No.3 development team of the Fifth Academy of Aerospace Science and Technology Group overcame the inter-satellite link technology and adopted the integrated design of inter-satellite and inter-satellite transmission functions to realize the link interoperability between satellites and between satellites and ground stations. That is to say, although it is "invisible", the use of inter-satellite link technology to realize the hand-in-hand and heart-to-heart connection between aerospace brothers not only realizes the communication and data transmission between them, but also measures the distance between them and automatically "maintains the formation", which can reduce the pressure of ground management and maintenance.
Highlight 2: New technology realizes long satellite life. "Beidou is an open system. The development of satellite navigation technology in China, the world and China is an important infrastructure for the national economy, and it also provides time coordinates and space coordinates for all mankind. The continuity and stability of services are very important, "said Chi Jun, commander-in-chief of Beidou-3 satellite in the Fifth Academy of Aerospace Science and Technology Group. Just as water and electricity cuts affect urban life, once the satellite navigation service is interrupted, the normal operation of the country and society will be greatly affected. In order to improve the reliability of on-orbit satellite service, Beidou-3 satellite has taken a number of reliability measures, so that the design life of the satellite reaches 12 years and reaches the advanced level of international navigation satellites, which provides basic guarantee for the continuity and stability of Beidou system service.
Highlight 3: The new "artifact" makes the service "zero error". In order to improve the service accuracy, Beidou-3 is equipped with a new generation of atomic clock, which can improve the satellite performance and user experience by improving the atomic clock index. Atomic clock uses stable atomic transition frequency to ensure the accuracy of generation time. At present, there are mainly rubidium atomic clocks, hydrogen maser atomic clocks and cesium atomic clocks in the world. China's Beidou satellite adopts rubidium atomic clock and is equipped with a newly developed domestic hydrogen maser with higher performance. Although the mass and power consumption of hydrogen maser are larger than that of rubidium atomic clock, its stability and drift rate are better. On-orbit application of spaceborne hydrogen maser plays an important role in Beidou navigation and positioning.
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