基于WUM精密钟差产品的BDS-3星载原子钟性能评估  

Performance Evaluation of BDS-3 Atomic Clocks Based on WUM Precise Clock Products

作　　者：武子谦 唐成盼[3] 张京奎 盛传贞 WU Ziqian;TANG Chengpan;ZHANG Jingkui;SHENG Chuanzhen(State Key Laboratory of Satellite Navigation System and Equipment Technology,Shijiazhuang 050081,China;The 54th Research Insitute of CETC,Shijiazhuang 050081,China;Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai 200030,China)

机构地区：[1]卫星导航系统与装备技术国家重点实验室,河北石家庄050081 [2]中国电子科技集团公司第五十四研究所,河北石家庄050081 [3]中国科学院上海天文台,上海200030

出　　处：《无线电工程》2023年第5期1032-1040,共9页Radio Engineering

基　　金：河北省省级科技计划项目(206Z0303G)。

摘　　要：导航卫星星载原子钟的在轨性能直接影响导航系统定位、导航与授时(Position, Navigation and Timing, PNT)服务的精度和稳定性。基于武汉大学MGEX分析中心发布的精密卫星钟差产品,对BDS-3卫星星载原子钟的频率稳定性、钟差预报精度和钟速变化特征开展了分析评估。对GPS III和Galileo FOC卫星的星载原子钟性能开展分析,并与BDS-3的星载原子钟性能进行了对比。结果表明,BDS-3 PHM的平均天稳定度为4.62×10-15, 7 d钟差预报精度为2.3 ns, 10 d钟率变化为1.79×10-14s/s,其长期性能优于GPS III和Galileo FOC星载原子钟。值得指出的是,BDS-3 C19 RAFS的在轨性能远优于其他BDS-3 RAFS。The in-orbit performance of satellite clock directly affects the accuracy and stability of Positioning,Navigation and Timing(PNT)service of navigation system.Based on the precise clock products released by the MGEX Analysis Center(AC)of Wuhan University(WUM),the frequency stability,clock prediction accuracy and clock rate variation characteristics of BDS-3 onboard atomic clocks are analyzed.The performance of the first GPS III and the four most-recent Galileo FOC onboard clocks are investigated,the results of which are compared with that of BDS-3.Results show that the average 86400-s frequency stability,7-day clock prediction accuracy and 10-day clock rate variations of BDS-3 PHMs are 4.62×10-15,2.3 ns and 1.79×10-14 s/s,respectively,which indicate a better long-term performance than that of the GPS III and the four most-recent Galileo FOC clocks.It is worth noting that the in-orbit performance of the BDS-3 C19 RAFS is far superior to that of other BDS-3 RAFSs.

关 键 词：北斗三号 原子钟 被动型氢原子钟 阿伦方差 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]