北斗三号卫星钟长期稳定性分析  

Long-term stability analysis of BDS-3 satellite clock

作　　者：樊礼谦 焦文海[2] 蔡洪亮[2] 周巍 徐颖 周舒涵 FAN Liqian;JIAO Wenhai;CAI Hongliang;ZHOU Wei;XU Ying;ZHOU Shuhan(Institute of Geospatial Information,Information Engineering University,Zhengzhou 450001,China;Beijing Institute of Tracking and Telecommunication Technology,Beijing 100094,China;Aerospace Information Research Institute,Chinese Academy of Sciences,Beijing 100094,China)

机构地区：[1]信息工程大学地理空间信息学院,郑州450001 [2]北京跟踪与通信技术研究所,北京100094 [3]中国科学院空天信息创新研究院,北京100094

出　　处：《导航定位学报》2022年第4期11-19,共9页Journal of Navigation and Positioning

摘　　要：采用北斗三号(BDS-3)卫星2 a精密钟差产品,分析了BDS-3卫星钟相位和频率的变化情况,提出了一种跳变频率修复方法并评估了卫星钟的长期稳定性。结果表明:BDS-3卫星氢钟表现出色,调频次数明显少于铷钟,且长期稳定性优于铷钟。中圆地球轨道(MEO)卫星氢钟5 d以上的稳定度最优可达3.5×10^(-15),重叠哈达玛(Hadamard)方差平均值皆小于8×10^(-15);铷钟15 d以内的稳定度优于9×10^(-14),重叠Hadamard方差平均值小于5×10^(-14),30 d以上的稳定度较差;倾斜地球同步轨道(IGSO)卫星氢钟在研究的时间段内的稳定度皆优于3×10^(-14)。依托长期稳定性评估结果,可为长期自主守时原子钟加权提供参考依据。The two-year precise clock offset of BeiDou-3 navigation satellite System(BDS-3)satellite was used to analyze the phase and frequency variations of the BDS-3 satellite clock,and a jump frequency repair method was proposed and the long-term stability of the satellite clock was evaluated.The results show that the BDS-3 passive hydrogen maser performs well,with significantly fewer tuning times than the rubidium clock,and better long-term stability than the rubidium clock.The optimal stability of Medium Earth Orbit(MEO)satellite passive hydrogen masers can reach 3.5×10^(-15)above 5 d intervals,and the average value of overlapping Hadamard variances is less than 8×10^(-15).The stability of the rubidium clocks is better than 9×10^(-14)below 15 d intervals,and the average value of overlapping Hadamard variances is less than 5×10^(-14),but the stability above 30 d intervals is poor.The stability of Inclined GeoSynchronous Orbit(IGSO)satellite passive hydrogen masers is better than 3×10^(-14).Relying on the results of the long-term stability assessment,it can provide a reference for long-term autonomous timekeeping atomic clock weighting.

关 键 词：北斗三号 卫星钟 长期变化 长期稳定性 频率跳变 

分 类 号：P228[天文地球—大地测量学与测量工程]