摘要
基于我国时间基准UTC(NTSC)系统,开展北斗天线相位中心(APC)改正在精密单点定位(PPP)以及高精度时间比对中的应用研究。通过接收机实测的北斗数据以及国际GNSS服务(IGS)中心提供的北斗精密钟差产品、轨道产品和IGS发布的多系统APC改正文件,进行北斗精密单点定位数据处理。结果表明,APC改正前后的精密单点定位X、Y、Z 3个方向上的误差均方根分别为0. 011 0、0. 021 2、0. 009 5 m以及0. 002 6、0. 007 1、0. 003 7 m,可以看出修正后的定位精度具有明显的提高。同样在零基线共钟时间比对以及远距离时间比对方面,两接收机同源零基线比对结果的标准偏差由未进行APC修正前的0. 148 2 ns降到修正后的0. 093 0 ns;远距离高精度时间比对结果的标准偏差从修正前的0. 302 9 ns降低到修正后的0. 266 8 ns,时间比对的短期稳定度也有所提高。因此,随着北斗系统的建设以及国际GNSS服务分析中心的相关北斗精密产品的不断完善,北斗的服务精度将越来越高。
In this paper,based on the China's national time reference system of UTC(NTSC),the application study of BeiDou antenna phase center(APC)correction in precise point positioning(PPP)and high precision time comparison is carried out.Based on the data collected through BeiDou receiver,and the BeiDou precision products of clock,orbit and APC correction file downloaded from International GNSS Service(IGS)analysis center,the data processing of the BeiDou PPP is performed.The results show that the RMS of the PPP errors in X,Y and Z directions are about 0.011 0,0.021 2 and 0.009 5 m before APC correction,and about 0.002 6,0.007 1 and 0.003 7 m after antenna phase center correction,respectively.It can be seen that the positioning precision is improved obviously after APC correction.When the APC corrections are applied to the two receivers for the zero baseline common clock difference comparison,the standard deviation of the comparison results is decreased from 0.148 2 ns before correction to 0.093 0 ns after correction.For the long distance precision time comparison,the standard deviation of the comparison results is decreased from 0.302 9 ns before correction to 0.266 8 ns after correction.Therefore,with the construction of the BeiDou system and the continuous improvement of related BeiDou precision products from international GNSS service(IGS)analysis center,the service precision of BeiDou will be better and better.
作者
张继海
董绍武
卢鋆
袁海波
广伟
Zhang Jihai;Dong Shaowu;Lu Jun;Yuan Haibo;Guang Wei(National Time Service Center,CAS,Xi'an710600,China;Key Laboratory of Time&Frequency Primary Standards,Chinese Academy of Sciences,Xi'an710600,China;University of Chinese Academy of Sciences,Beijing100049,China;School of Astronomy and Space Science,UCAS,Beijing100049,China;Beijing Institute of Tracking andTelecommunications Technology,Beijing100046,China)
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2019年第7期90-96,共7页
Chinese Journal of Scientific Instrument
基金
国家重点研发计划(2016YFF0200200)
中国科学院国家授时中心“青年创新人才”(NTSC青创201804)
国家自然科学基金(11703030)资助项目
关键词
北斗卫星导航系统
天线相位中心改正
精密单点定位
高精度时间比对
BeiDou Navigation Satellite System(BDS)
satellite antenna phase center correction
precise point positioning
high precision time comparison
