北斗实时百皮秒级单差时频同步方法  

BDS real-time 100 picosecond level single difference time and frequency synchronization method

作　　者：施闯 宋伟 郑福 王浩源 王玉琢[5] 张爱敏[5] 唐卫明[6] SHI Chuang;SONG Wei;ZHENG Fu;WANG Haoyuan;WANG Yuzhuo;ZHANG Aimin;TANG Weiming(Laboratory of Navigation and Communication Fusion Technology,Ministry of Industry and Infomation Technology,Beihang University,Beijing 100083,China;College of Information and Electrical Engineering,China Agricultural University,Beijing 100083,China;Key Laboratory of Agricultural Machinery Monitoring and Big Data Application,Ministry of Agriculture and Rural Affairs,Beijing 100083,China;Research Institute for Frontier Science,Beihang University,Beijing 100083,China;National Institute of Metrology,Beijing 100029,China;GNSS Research Center,Wuhan University,Wuhan 430079,China)

机构地区：[1]北京航空航天大学卫星导航与移动通信融合技术工业和信息化部重点实验室,北京100083 [2]中国农业大学信息与电气工程学院,北京100083 [3]农业农村部农机作业监测与大数据应用重点实验室,北京100083 [4]北京航空航天大学前沿科学技术创新研究院,北京100083 [5]中国计量科学研究院,北京100029 [6]武汉大学卫星导航定位技术研究中心,湖北武汉430079

出　　处：《测绘学报》2024年第5期869-878,共10页Acta Geodaetica et Cartographica Sinica

基　　金：国家自然科学基金(42227802,41931075);云南省科技项目(202102AE090051);国家重点研发计划(2023YFB3906501)。

摘　　要：高精度时频传递与时间同步服务已成为全球导航卫星系统应用领域的研究热点,国内外学者围绕GNSS高精度时频同步模型算法及相关应用等方面开展了诸多研究。本文提出基于载波相位的差分高精度时间传递模型,实现基于北斗卫星导航系统的实时百皮秒级单差时频同步。以中国计量科学研究院的光纤链路为参考,北斗时间同步精度优于时频同步系统的实时秒脉冲时间同步精度优于100 ps;在7 d的测试时段内,链路的时间稳定度优于70 ps;链路频率万秒稳定度可达10-15量级,频率长期稳定度可达10-16量级。利用BDS进行单差时频同步的频率稳定度与GPS相当,对开展BDS在时频领域的下一步推广应用提供重要的参考意义。High precise time-frequency transfer and time synchronization services have become a research focus in GNSS applications.Scholars have conducted numerous studies on time-frequency synchronization models,algorithms and related applications.We propose adifferential precise time transfer model based on carrier phase observations,and establish a BeiDou navigation satellite system real-time 100 picosecond level differential time and frequency synchronization system.With the time transfer results of the fiber optic links as reference,differential precise time and frequency synchronization performance is validated.the standard deviation of the BDS real-time pulse per second results is better than 100 ps.What s more,the time deviation of the time link within 7 days is better than 70 ps.In terms of frequency stability,modified Allan deviation of 104 seconds can reach the level of 10-15,and the long-term frequency stability reaches the level of 10-16.Additionally,the frequency stability of BDS is comparable to that of GPS,which is of valuable significance for further expanding the application of BDS in the time and frequency community.

关 键 词：BDS 载波相位单差 精密时频传递 实时时间同步 

分 类 号：P228[天文地球—大地测量学与测量工程]