A New Space-to-Ground Microwave-Based Two-Way Time Synchronization Method for Next-Generation Space Atomic Clocks

doi:10.3390/rs14030528

NTSC-IR > 导航与通信研究室

	A New Space-to-Ground Microwave-Based Two-Way Time Synchronization Method for Next-Generation Space Atomic Clocks
	Guo, Yanming 1,2; Gao, Shuaihe 1; Bai, Yan1 ; Pan, Zhibing 1; Liu, Yinhua 1; Lu, Xiaochun1,2 ; Zhang, Shougang 1,2
	2022-02-01
发表期刊	REMOTE SENSING
卷号	14 期号:3 页码:15
摘要	The accuracy of time synchronization can be significantly increased by enhancing the performance of atomic clocks. Future-generation time-frequency loads will be equipped with the latest ultrahigh-precision atomic clocks (with a day stability better than 10(-17)) and will leverage advantages of the space environment such as microgravity and low interference to operate a new generation of high-performance time-frequency payloads on low-orbit spacecraft. Moreover, using the high-precision time-frequency system of ground stations, low-time-delay high-performance time-frequency transmission networks, which have the potential to achieve ultrahigh-precision time synchronization, will be constructed. By considering full link error terms above the picosecond level, this paper proposes a new space-to-ground microwave two-way time synchronization method for scenarios involving low-orbit spacecraft and ground stations. Using the theoretical principles and practical application scenarios related to this method, a theoretical and simulation verification platform was developed to research the impact of the attitude, phase center calibration, and orbit determination errors on the single-frequency two-way time synchronization method. The effectiveness of this new method was verified. The results showed that when the attitude error is less than 72 arc seconds (0.02 degrees), the phase center calibration error is less than 1 mm, and the precision orbit determination (POD) error is less than 10 cm (three-axis). After disregarding nonlink error terms such as equipment noise, this method can attain a space-to-ground time synchronization accuracy of better than 1.5 ps, and the time deviation (TDEV) of the transfer link is better than 0.7 ps @ 100 s, which results in ultrahigh-precision space-to-ground time synchronization.
关键词	low-orbit spacecraft new generation of high-performance time-frequency payloads microwave two-way time synchronization
资助者	National Natural Science Foundation of China ; National Natural 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 Natural Science Foundation of China Youth Fund Project ; National Natural Science Foundation of China Youth Fund Project ; National Natural Science Foundation of China ; National Natural 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 Natural Science Foundation of China Youth Fund Project ; National Natural Science Foundation of China Youth Fund Project ; National Natural Science Foundation of China ; National Natural 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 Natural Science Foundation of China Youth Fund Project ; National Natural Science Foundation of China Youth Fund Project ; National Natural Science Foundation of China ; National Natural 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 Natural Science Foundation of China Youth Fund Project ; National Natural Science Foundation of China Youth Fund Project
DOI	10.3390/rs14030528
关键词[WOS]	SATELLITES
语种	英语
资助项目	National Natural Science Foundation of China[11873009] ; CAS Light of West China Program[E016YR1R] ; Shaanxi Provincial Talents Plan[E039SB1K] ; National Natural Science Foundation of China Youth Fund Project[11903039]
资助者	National Natural Science Foundation of China ; National Natural 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 Natural Science Foundation of China Youth Fund Project ; National Natural Science Foundation of China Youth Fund Project ; National Natural Science Foundation of China ; National Natural 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 Natural Science Foundation of China Youth Fund Project ; National Natural Science Foundation of China Youth Fund Project ; National Natural Science Foundation of China ; National Natural 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 Natural Science Foundation of China Youth Fund Project ; National Natural Science Foundation of China Youth Fund Project ; National Natural Science Foundation of China ; National Natural 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 Natural Science Foundation of China Youth Fund Project ; National Natural Science Foundation of China Youth Fund Project
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS记录号	WOS:000760079200001
出版者	MDPI
引用统计
文献类型	期刊论文
条目标识符	http://210.72.145.45/handle/361003/13917
专题	导航与通信研究室
通讯作者	Gao, Shuaihe
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,Gao, Shuaihe,Bai, Yan,et al. A New Space-to-Ground Microwave-Based Two-Way Time Synchronization Method for Next-Generation Space Atomic Clocks[J]. REMOTE SENSING,2022,14(3):15.
APA	Guo, Yanming.,Gao, Shuaihe.,Bai, Yan.,Pan, Zhibing.,Liu, Yinhua.,...&Zhang, Shougang.(2022).A New Space-to-Ground Microwave-Based Two-Way Time Synchronization Method for Next-Generation Space Atomic Clocks.REMOTE SENSING,14(3),15.
MLA	Guo, Yanming,et al."A New Space-to-Ground Microwave-Based Two-Way Time Synchronization Method for Next-Generation Space Atomic Clocks".REMOTE SENSING 14.3(2022):15.