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

doi:10.1007/s10291-023-01459-9

NTSC-IR > 导航与通信研究室

	Methods and assessments of two-way time synchronization based on BDS-3 Ka-band satellite-ground link observations
	Guo, Yanming 1,2; Bai, Yan1 ; Zhang, Jian 1,2; Li, Wei 1; Zou, Decai 1; Gao, Shuaihe 1; Yuan, Haibo 1; Gao, Yuping 1; Lu, Xiaochun 1
	2023-07-01
发表期刊	GPS SOLUTIONS
ISSN	1080-5370
卷号	27 期号:3 页码:14
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.
关键词	BDS-3 Two-way time synchronization Satellite-ground link Ka-mode Relative clock offset Accuracy
资助者	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
DOI	10.1007/s10291-023-01459-9
关键词[WOS]	ORBIT DETERMINATION
语种	英语
资助项目	National Nature Science Foundation of China[11873009] ; CAS "Light of West China " Program[E016YR1R] ; Shaanxi Provincial Talents Plan[E039SB1K]
资助者	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
WOS研究方向	Remote Sensing
WOS类目	Remote Sensing
WOS记录号	WOS:000999884500001
出版者	SPRINGER HEIDELBERG
引用统计
文献类型	期刊论文
条目标识符	http://210.72.145.45/handle/361003/14234
专题	导航与通信研究室
通讯作者	Bai, Yan
作者单位	1.Chinese Acad Sci, Natl Time Serv Ctr, Xian 710600, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100039, 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.