On May 25, 2003 at 00:34, China successfully launched the third "Beidou-1" navigation and positioning satellite into space using the "Long March 3A" carrier rocket at the Xichang Satellite Launch Center. The first two "Beidou-1" satellites were launched on October 31 and December 21, 2000, respectively. The navigation and positioning system worked stably and was in good condition. On January 17, 2010 at 0:12, China successfully launched its third Beidou navigation satellite (Beidou-3) again in Xichang. This marks another important step in the construction of the Beidou satellite navigation system project, and the satellite network is steadily advancing according to plan. [1]

　　The Beidou navigation satellite system is a regional navigation system that provides satellite navigation information 24/7 and 24/7. The successful networking of the Beidou satellite navigation system will be able to provide services equivalent to GPS. China's Beidou satellite navigation system will become a new star synonymous with GPS for "satellite navigation system". Unlike GPS, the "Beidou" command aircraft and terminals can communicate in both directions. After the Sichuan earthquake on May 12, 2008, the Beijing Armed Police Command Center and the Sichuan Armed Police Force conducted over a hundred exchanges using the "Beidou". The Beidou-2 series of satellites have entered the peak period of networking. By building their own satellite navigation system and having their own system, China's national defense will fundamentally break free from being controlled by the United States. China's cutting-edge weapons have their own eyes, and the independence of the country's navigation system is guaranteed, making it more reliable. It is expected to form a global coverage system consisting of over thirty satellites by 2015.

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