2000年10月31日和12月21日,“长征三号甲”运载火箭先后顺利地把两颗“北斗导航试验卫星”准确地送入预定轨道,并定点成功,从此我国拥有了由我国航天科技人员自主研究开发的第一代卫星导航定位系统。北斗导航系统可以为公路交通、铁路运输、海上作业等提供全天候24小时连续的导航定位服务。 On October 31 and December 21, 2000, the “Long March III A” rocket successfully delivered two “Beidou Navigation Experimental Satellites” to the scheduled orbit successfully and fixed-point success. Since then, China has owned The first generation of satellite navigation and positioning system independently researched and developed by China’s space science and technology personnel. Beidou navigation system for road traffic, rail transport, maritime operations, such as providing around-the-clock 24-hour navigation and positioning services.