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2000年12月21日0时20分,我国自行研制的第二颗“北斗导航试验卫星”在西昌卫星发射中心用“长征三号甲”火箭发射升空,并准确进入预定轨道。它与同年10月31日发射的第一颗“北斗导航试验卫星’一起,组成我国第一代双星导航定位系统——“北斗导航系统”。双星定位系统的成功运行,标志着我国卫星定位导航技术在国际上已经居于领先地位。同时,为我国在军事上摆脱受制于人的被动局面作出了重大贡献。
At 0:20 on December 21, 2000, the second “Beidou Navigation Experimental Satellite” developed by our country was launched at the Xichang Satellite Launch Center with the “Long March III A” rocket and entered the intended orbit accurately. It was the first “Beidou Navigation Experimental Satellite” launched on October 31 of the same year to form the first-generation binary satellite navigation and positioning system in China - “Beidou Navigation System.” The successful operation of the binary satellite positioning system marked the beginning of China’s satellite positioning and navigation Technology has taken a leading position in the world and at the same time, it has made a significant contribution to our country in getting rid of the passive state controlled by man in military affairs.