NAOC Open IR
BeiDou-3 broadcast clock estimation by integration of observations of regional tracking stations and inter-satellite links
Yang, Yufei1; Yang, Yuanxi2,3; Hu, Xiaogong4; Tang, Chengpan4; Guo, Rui1; Zhou, Zhanshi4; Xu, Junyi1; Pan, Junyang4; Su, Mudan5
2021-02-12
Source PublicationGPS SOLUTIONS
ISSN1080-5370
Volume25Issue:2Pages:12
AbstractThe BeiDou navigation satellite system (BDS) tracks medium earth orbit (MEO) satellites using only regional tracking stations in China. As a result, the broadcast clock accuracy of the MEO satellites decreases rapidly during the invisible arcs because of the lack of available observations. The inter-satellite link (ISL) technology of the third generation of BDS (BDS-3) can be used to extend the visible arcs of MEO satellites and to measure the relative inter-satellite clock in nearly real time. We propose a broadcast clock approach for BDS-3 by integrating observations from regional tracking stations and ISLs. The clock error between satellites is obtained through centralized estimation based on ISLs. The Ka-band hardware delay is calibrated by taking the double difference between ISL-centralized clock and the Multi-satellite Precise Orbit Determination clock. The deviation between the ISL-centralized clock and the BeiDou time is obtained using only one Two-way Satellite Time Comparison station or anchor station. To validate the algorithms, we analyze clock estimation and prediction accuracy, hardware delay stability, and time synchronization accuracy. The results show that the frequency stability of the BDS-3 onboard passive hydrogen maser (PHM) and rubidium atomic frequency standard (RAFS) is competitive to those of the GPS IIF RAFS and Galileo FOC PHM and better than those of GPS IIR RAFS. The root-mean-square error of the 2-h clock prediction is better than 0.25 ns, and the validation result relative to the post-processed precise clock product is better than 0.4 ns. The time synchronization accuracy of better than 1 ns can be obtained based on only one TSTC station or an anchor station, and the standard deviation of Ka-band hardware delay is about 0.12 ns. It is believed that the ISL and the proposed algorithms will bring a significant upgrade in the estimation of BDS-3 broadcast clock; the broadcast clock accuracy will be greatly improved, and reliance on the ground segment will also be reduced significantly.
KeywordBeiDou Broadcast clock Inter-satellite link Frequency stability TSTC Anchor station
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
DOI10.1007/s10291-020-01067-x
Language英语
Funding ProjectNational Natural Science Foundation of China[41931076] ; National Natural Science Foundation of China[L1924033] ; National Natural Science Foundation of China[41904042] ; National Natural Science Foundation of China[41804030] ; National Natural Science Foundation of China[41874039]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS Research AreaRemote Sensing
WOS SubjectRemote Sensing
WOS IDWOS:000619150200001
PublisherSPRINGER HEIDELBERG
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/79547
Collection中国科学院国家天文台
Corresponding AuthorYang, Yuanxi
Affiliation1.Beijing Satellite Nav Ctr, Beijing 100094, Peoples R China
2.Xian Res Inst Surveying & Mapping, Xian 710054, Peoples R China
3.Natl Key Lab Geoinformat Engn, Xian 710054, Peoples R China
4.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
5.Beijing Inst Tracking & Telecommun Technol, Beijing 100094, Peoples R China
Recommended Citation
GB/T 7714
Yang, Yufei,Yang, Yuanxi,Hu, Xiaogong,et al. BeiDou-3 broadcast clock estimation by integration of observations of regional tracking stations and inter-satellite links[J]. GPS SOLUTIONS,2021,25(2):12.
APA Yang, Yufei.,Yang, Yuanxi.,Hu, Xiaogong.,Tang, Chengpan.,Guo, Rui.,...&Su, Mudan.(2021).BeiDou-3 broadcast clock estimation by integration of observations of regional tracking stations and inter-satellite links.GPS SOLUTIONS,25(2),12.
MLA Yang, Yufei,et al."BeiDou-3 broadcast clock estimation by integration of observations of regional tracking stations and inter-satellite links".GPS SOLUTIONS 25.2(2021):12.
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