Following the “One Arrow and Two Stars” from French Guiana on July 15th, China also successfully used the “Long March 3B/Expedition 1” in Xichang, Sichuan Province on the evening of the 25th to bring a new generation of Chinese Beidou. The two navigation satellites of the satellite navigation system are accurately sent to the predetermined orbit. This launch brings the number of Beidou satellite navigation system satellites to 19, making the Beidou satellite navigation system a step forward in the global coverage plan. It is very likely in the future. Become a competitor of the US “Global Satellite Navigation” (GPS) system.
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One arrow and two stars (taken from the Internet)
The rocket used this time, “Long March 3B/Expedition 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. By adopting this method of delivery, the fuel of the artificial satellite itself can be reduced.
Beidou satellite navigation system (taken from the Internet)
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.The Beidou satellite navigation system is a global satellite navigation system independently developed 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 that covers 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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