3月30日21点52分,由航天科工二院203所研发的新一代星载铷原子钟跟随北斗卫星在西昌卫星发射中心成功首发。星载原子钟是北斗导航系统的时频系统心脏,能够决定导航系统定位、测速精度,是一个国家是否具备独立发展导航系统能力的核心标志之一。本次试验卫星搭载的是203所为北斗量身定制的第二代高性能铷原子钟,关键性能指标 At 21:52 on March 30, a new generation of spaceborne rubidium atomic clocks developed by 203 of Aerospace Science and Industry Institute No. 2 followed the Beidou satellite successfully launched at the Xichang Satellite Launch Center. The spaceborne atomic clock is the heart of the Beidou Navigation System’s time-frequency system and can determine the navigation system’s positioning and speed measurement accuracy. It is one of the core signs that a country has the capability of independently developing a navigation system. The test satellite equipped with 203 for the Beidou tailored second-generation high-performance rubidium atomic clock, the key performance indicators