BDS星载原子钟频率稳定性分析

发布时间：2018-10-13 09:44

【摘要】：卫星导航系统中星载原子钟作为系统的星上时间基准,其性能直接决定着导航定位的精度。北斗卫星导航系统(BeiDou navigation satellite system,BDS)目前处于全面建设阶段,对系统星载原子钟的性能进行评估非常重要。结合评价星载铷原子钟稳定性的哈达玛(Hadamard)方差、重叠哈达玛方差和哈达玛总方差,分别基于5min和15min采样间隔的北斗精密钟差数据,综合三种方差的计算结果对北斗卫星导航系统星载原子钟频率稳定性进行较为全面的评估,得到了一些有益的结论。
[Abstract]:In the satellite navigation system, the on-board atomic clock is used as the onboard time reference of the system, and its performance directly determines the accuracy of navigation and positioning. Beidou Satellite Navigation system (BeiDou navigation satellite system,BDS) is currently in a comprehensive construction stage. It is very important to evaluate the performance of spaceborne atomic clock. Combined with Hadama (Hadamard) variance, overlapping Hadamard variance and total Hadamard variance, the Beidou precision clock difference data based on sampling intervals of 5min and 15min are used to evaluate the stability of space-borne rubidium atomic clock. The stability of space-borne atomic clock frequency of Beidou satellite navigation system is evaluated comprehensively by synthesizing the calculation results of three variances, and some useful conclusions are obtained.
【作者单位】：信息工程大学地理空间信息学院;地理信息工程国家重点实验室;
【分类号】：TN967.1

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