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Methods and assessments of two-way time synchronization based on BDS-3 Ka-band satellite-ground link observations

文献类型：期刊论文

作者Guo, Yanming1,2; Bai, Yan2; Zhang, Jian1,2; Li, Wei2; Zou, Decai2; Gao, Shuaihe2; Yuan, Haibo2; Gao, Yuping2; Lu, Xiaochun2
刊名GPS SOLUTIONS
出版日期2023-07-01
卷号27期号:3页码:14
关键词BDS-3 Two-way time synchronization Satellite-ground link Ka-mode Relative clock offset Accuracy
ISSN号1080-5370
DOI10.1007/s10291-023-01459-9
英文摘要The Beidou-3 system (BDS-3) satellites are deployed, equipped with an inter-satellite link (ISL) payload, so that the satellite-satellite or satellite-ground time synchronization is available. The satellite-ground link (GSL) can be used in conjunction with the ISL if proper attention is paid to all corrections and the biases are fitted. We execute methods to synchronize the clocks of BDS-3 satellites to an accurate reference clock on the ground, by estimating relative clock offsets obtained via Ka-band GSL observations. We solve for the relative biases using the closure properties of the redundant biases and the Ka-band (Ka-mode) satellite-ground two-way data. We find the biases, relative to the GSL hardware delay, are relatively stable in the short term. This makes it feasible to estimate them as a constant every few hours, and the standard deviation of the hardware delay estimations within 24 h is slightly less than 0.7 ns. The frequency stability of Ka-mode estimated clock offset shows a negative short-term performance because of the dominant effect of the white phase noise in the relative clock offsets from the Ka-mode, but the long-term performance seems to be improved to a higher level. The time synchronization accuracy of Ka-mode is proven to be better than 0.3 ns (RMS), whereas the accuracy for the high-orbit satellite is slightly worse.
WOS关键词ORBIT DETERMINATION
资助项目National Nature Science Foundation of China[11873009] ; CAS "Light of West China " Program[E016YR1R] ; Shaanxi Provincial Talents Plan[E039SB1K]
WOS研究方向Remote Sensing
语种英语
WOS记录号WOS:000999884500001
出版者SPRINGER HEIDELBERG
资助机构National Nature Science Foundation of China ; National Nature Science Foundation of China ; CAS "Light of West China " Program ; CAS "Light of West China " Program ; Shaanxi Provincial Talents Plan ; Shaanxi Provincial Talents Plan ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; CAS "Light of West China " Program ; CAS "Light of West China " Program ; Shaanxi Provincial Talents Plan ; Shaanxi Provincial Talents Plan ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; CAS "Light of West China " Program ; CAS "Light of West China " Program ; Shaanxi Provincial Talents Plan ; Shaanxi Provincial Talents Plan ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; CAS "Light of West China " Program ; CAS "Light of West China " Program ; Shaanxi Provincial Talents Plan ; Shaanxi Provincial Talents Plan
源URL[http://210.72.145.45/handle/361003/14234]  
专题国家授时中心_导航与通信研究室
通讯作者Bai, Yan
作者单位1.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
2.Chinese Acad Sci, Natl Time Serv Ctr, Xian 710600, Peoples R China
推荐引用方式
GB/T 7714		 Guo, Yanming,Bai, Yan,Zhang, Jian,et al. Methods and assessments of two-way time synchronization based on BDS-3 Ka-band satellite-ground link observations[J]. GPS SOLUTIONS,2023,27(3):14.
APA Guo, Yanming.,Bai, Yan.,Zhang, Jian.,Li, Wei.,Zou, Decai.,...&Lu, Xiaochun.(2023).Methods and assessments of two-way time synchronization based on BDS-3 Ka-band satellite-ground link observations.GPS SOLUTIONS,27(3),14.
MLA Guo, Yanming,et al."Methods and assessments of two-way time synchronization based on BDS-3 Ka-band satellite-ground link observations".GPS SOLUTIONS 27.3(2023):14.

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来源：国家授时中心

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