Original title: the 49th Beidou navigation satellite launches Beidou global networking into the sprint period
4hw.org at 1:43 a.m. on November 5, with the successful launch of the 49th Beidou navigation satellite by the long march 3B carrier rocket, the project of beidou-3 navigation satellite system ushered in a milestone moment: the launch of the last IGSO satellite of beidou-3 system was completed, marking the successful completion of the orbit networking, and the completion of Beidou global networking by 2020 Lay a solid foundation.
The 'igso-3 orbit is known as the Beidou' exclusive 'orbit, with three satellites.
Internationally, neither GPS nor navigation systems such as GLONASS have designed the satellite deployment of this orbit.
This is because the design position of beidou-3 IGSO track is 118 degrees longitude, just above China. It can be said that it is worthy of the name 'customized for China'.
Chen Zhonggui, chief designer of the 49 Beidou navigation satellite of the five homes of Aerospace Science and technology group, said, "this star is of great significance for completing the Beidou global system networking, serving China's &lsquo and &rsquo." '
Chen Zhonggui said that the 49th Beidou navigation satellite, based on the use of high-precision hydrogen atomic clock and rubidium atomic clock, also carries a new type of experimental atomic clock, which can better improve the time accuracy. After in orbit verification, it will lay a foundation for the improvement of the time accuracy of subsequent satellites.
At the same time, this satellite has both the "old signal" of beidou-2 and the new signal of beidou-3, which ensures the smooth transition between beidou-2 and beidou-3 signals and facilitates the continuous and stable use of Beidou navigation system by the ground users.
Beidou unique design embodies Chinese wisdom and innovation
In the late 20th century, China began to explore the development path of satellite navigation system suitable for national conditions, and gradually formed a "three-step" development strategy: the Beidou-1 system was built at the end of 2000 to provide services to China; the beidou-2 system was built at the end of 2012 to provide services to the Asia Pacific region; the beidou-3 system was built around 2020 to provide services to the world.
Beidou-3 navigation satellite system is composed of MEO satellite, GEO satellite and IGSO satellite, including 24 MEO satellites, 3 geo satellites and 3 IGSO satellites.
This layout design of three different orbit hybrid constellations created by China is the unique and international initiative of Beidou system, which can not only cover the world, but also provide higher precision positioning and navigation services. Among them, the short message function of Beidou is a unique skill. It successfully integrates navigation and communication, which can realize two-way communication, reflecting the wisdom and innovation of Chinese people.
The 'model worker' of the 'Long March' long march rocket series
This launch is the 317th flight of the long march series launch vehicle. Among them, the long 3A series launch vehicles have successfully launched 106 times, accounting for about one third of the launch times of China's launch vehicles, which can be called the "labor model" of China's launch vehicles.
The long triple a rocket series is the rocket series with the most launch times and the highest success rate of high orbit mission in China. Up to now, the Beidou project has been launched from phase I to phase III, and the lunar exploration project from Chang'e-1 to chang'e-4 has been launched by the chang-3a series of rockets, which is the 'exclusive train' for China's major scientific and technological tasks.
The long-range, triple-A rocket has high orbit precision and strong adaptability, and the orbit precision of its launching satellite has reached the world-class level. Long Lehao, chief designer of the launch vehicle series of the first Academy of Aerospace Science and technology group and academician of Chinese Academy of engineering, said that the Long March III A, B and C Rockets have the characteristics of 'serialization, combination and modularization'. With their high adaptability to launch missions and high flight reliability, the Rockets play the role of 'prime' in the national major scientific and technological missions such as Chang'e flying to the moon and Beidou networking.
Beidou system 3 enters the stage of global network sprint
Satellite navigation system is an important infrastructure of a country. China's Beidou has embarked on a development path of "independence, independence, compatibility and openness".
In 2000, Beidou-1 made China's navigation realize the original positioning mechanism from scratch.
In 2012, beidou-2 realized regional networking and provided services to the Asia Pacific region. China Navigation fundamentally realized independent innovation.
On November 5, 2017, the first star of beidou-3 was successfully launched and put into orbit, opening a new era of global networking of Beidou system. In two years, the project has successfully completed 16 satellite launch missions for seven systems, more than 300 research and test units and tens of thousands of scientific researchers, and successfully put 24 beidou-3 networking satellites and two beidou-2 backup satellites into the scheduled orbit.
At present, the construction of beidou-3 system has entered the stage of decisive victory and sprint. In the future, six beidou-3 networking satellites will be launched to complete the global system of Beidou.
At that time, Beidou will become a global satellite navigation system with advanced performance. In the future, no matter which corner of the world, people can find their way through China's satellite navigation services.