Following on July 15th, Arion Aerospace Europe from French GuianaAfter carrying out “One Arrow and Two Stars”, on the evening of the 25th in Xichang, Sichuan Province, China also successfully used the “Long March 3B/Yuanzheng 1” to accurately send the two navigation satellites of the new-generation China Beidou satellite navigation system into the intended orbit. , This launch, letBeidou Satellite Navigation SystemThe number of satellites in China reaches 19, making the Beidou satellite navigation system one step closer to the global coverage plan. In the future, it is very likely to become a competitor of the US “Global Satellite Navigation” (GPS) system.
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One arrow and two stars (taken from the Internet)
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The rocket used this time, “Long March 3B/Yuanzheng 1”, is its second flight, and it is also the first time it has carried out a mission to transport a double star into orbit. The technology of One Arrow and Two Stars is to use the launch vehicle to add a stage of independent aircraft. After entering space, multiple artificial satellites are sent into different orbits. This kind of delivery method can reduce the fuel of the artificial satellite itself.
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Beidou satellite navigation system (taken from the Internet)
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China completed the Beidou satellite navigation test system with regional navigation functions in 2003, and began to provide services to most of the Asia-Pacific region in 2012, and is expected to complete the construction of the global system in 2020.Beidou satellite navigation system is a global satellite navigation system developed independently by China, andUnited States Global Positioning System (GPS)、Russian GLONASS System (GLONASS)andEU Galileo Positioning System（Galileo），被United Nations Satellite Navigation CommissionRecognized as the four core suppliers of global satellite navigation systems.
The construction of Beidou navigation satellite system implements the “three-step” strategy: the first step is to build the Beidou test navigation satellite system in 2000; the second step is to build the regional navigation system in 2012; the third step is to build the system around 2020 The Beidou satellite navigation system covering the world is composed of 5 geostationary orbit satellites and 30 non-geostationary orbit satellites. At present, the first two steps have been achieved, and China has become the third country in the world to have an autonomous satellite navigation and positioning system after the United States and Russia.
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