标题:The Accuracy Evaluation of Galileo Broadcast Clocks
作者:Liu, Yangyang; Sun, Baoqi; Yang, Xuhai; Wu, Meifang; Wang, Yuanxin; Su, Ke; Jiao, Guoqiang; Wang, Shengli
通讯作者:Sun, Baoqi;Sun, BQ;Sun, BQ;Sun, BQ
作者机构:[Liu, Yangyang; Sun, Baoqi; Yang, Xuhai; Wu, Meifang; Wang, Yuanxin] Chinese Acad Sci, Natl Time Serv Ctr, Xian, Shaanxi, Peoples R China.; [Liu, Ya 更多
会议名称:10th China Satellite Navigation Conference (CSNC)
会议日期:MAY 22-25, 2019
来源:CHINA SATELLITE NAVIGATION CONFERENCE (CSNC) 2019 PROCEEDINGS, VOL II
出版年:2019
卷:563
页码:81-91
DOI:10.1007/978-981-13-7759-4_8
关键词:Galileo; Broadcast ephemeris; Predicted clock offset; Precision; evaluation
摘要:Broadcast ephemeris accuracy is an important index of GNSS navigation system performance evaluation. As a component of broadcast ephemeris, the accuracy of predicted clock offset will directly affect the accuracy of navigation, positioning and timing. In order to access the accuracy of Galileo broadcast clocks, the content and characteristics of Galileo broadcast ephemeris are introduced in this paper first. Then, the principle and method of accuracy evaluation of broadcast ephemeris are explained. On this basis, the broadcast ephemeris data in the last two years since Galileo provided the initial service were used to analyze the accuracy of broadcast clock offset. As a comparison, the GBM precision clock offset products provided German Research Centre for Geosciences (GFZ) analysis center was taken as the truth value. The results show that: (1) The STD of broadcast clock offset of 15 Galileo satellites providing normal services is about 1 ns. The RMS of the broadcast clock offset is about 1 ns, except that of E24 which is 5.7 ns. (2) After the Galileo satellites provided service, the STD and the RMS of broadcast clock offset changes are within 1 ns and 1-1.4 ns, respectively, which partly reflects the stability of Galileo space-borne clock. The results would provide some reference for timing applications of Galileo satellite navigation system.
收录类别:CPCI-S;EI
资源类型:会议论文
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