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。
Space-borne atomic clocks act as satellite time reference in satellite navigation systems, and their performance directly determines navigation and positioning accuracy. The Chinese BeiDou satellite navigation system （BDS） is in full construction phase Thus, it is very important to evaluate the performance of the system. Combining the calculated results of the Hadamard Variance, the Overlapping Hadamard Variance, and the Hadamard Total Variance, currently available for evaluating the stability of space-borne rubidium atomic clocks, this paper comprehensively evaluates the frequency stability of BDS satellite clocks by using precise satellite clock bias data with 5-rain and 15-min sampling intervals. Meaningful conclusions are drawn.
作者
王宁
王宇谱
李林阳
翟树峰
吕志平
WANG Ning WANG Yupu LI Linyang ZHAI Shufeng LV Zhiping(Institute of Surveying and Mapping, Information Engineering University, Zhengzhou 450002, China State Key Laboratory of Geo-information Engineering, Xi＇an 710054, China)
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2017年第9期1256-1263,共8页
Geomatics and Information Science of Wuhan University
关键词
北斗卫星导航系统
星载原子钟
稳定性分析
数据采样间隔
BeiDou satellite navigation system
satellite atomic clock
stability analysis
sample interval
