北斗PPP高精度时间比对技术研究  

Study on BeiDou PPP high precision time comparison

作　　者：张继海[1,2,3] 董绍武 袁海波[1,2,3] 广伟 宋会杰[1,2] 章宇 ZHANG Ji-hai;DONG Shao-wu;YUAN Hai-bo;GUANG Wei;SONG Hui-jie;ZHANG Yu(National Time Service Center,Chinese Academy of Sciences,Xi’an 710600,China;Key Laboratory of Time and frequency Primary Standards,Chinese Academy of Sciences,Xi’an 710600,China;University of Chinese Academy of Sciences,Beijing 100049,China;School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 101048,China)

机构地区：[1]中国科学院国家授时中心,西安710600 [2]中国科学院时间频率基准重点实验室,西安710600 [3]中国科学院大学,北京100049 [4]中国科学院大学天文与空间科学学院,北京101048

出　　处：《时间频率学报》2020年第4期262-269,共8页Journal of Time and Frequency

基　　金：中国科学院“西部之光”人才培养计划“西部青年学者”B类资助项目(XAB2019B13);中国科学院国家授时中心青年创新人才资助项目。

摘　　要：随着我国北斗卫星导航系统的建设和完善,现已开始向全球用户提供高精度的定位、导航和授时服务。基于中国科学院国家授时中心和中国台湾中华电信两个守时实验室的GNSS时间比对系统,本文开展了基于北斗精密单点定位(PPP)的高精度远距离时间比对技术研究;并结合两个守时实验室的实测数据,利用IGS国际多模GNSS实验工程(MGEX)提供的精密轨道和钟差产品开展了比对试验,进而获得了两地钟差。试验结果表明,北斗PPP解算的两地钟差与GPS PPP解算的两地钟差具有很好的一致性,天稳达到了10-15量级;说明北斗可以实现纳秒级或亚纳秒级精度的时间比对与同步,为北斗正式纳入协调世界时的计算提供了基础。With the development and perfection of China BeiDou navigation satellite system(BDS),it begins to provide high precision positioning,navigation and time(PNT)service for the global users.In this paper,it studied the high precision and long distance time comparison based on precise point positioning(PPP)and the GNSS international time comparison systems which are operated in the National Time Service Center(NTSC),CAS and Chunghwa Telecommunication Laboratories(TL).The time difference between the local time and IGST is calculated by using the observation data of the time keeping laboratories and the precise orbit and satellite clock products from MGEX of IGS,then to calculate the time difference between NTSC and TL.The results show that the estimated time difference by BDS PPP is consistent with the GPS PPP,the frequency stability is in 1×10-15 per day.It also indicates that the BDS can realize the accuracy of nanosecond or sub-nanosecond level’s time compare,which provides a basis for the formal incorporation of BDS into the UTC calculation.

关 键 词：北斗卫星导航系统 高精度时间传递与比对 精密单点定位 协调世界时 

分 类 号：P228.4[天文地球—大地测量学与测量工程]