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

文献类型：期刊论文

作者Guo, Yanming1,2; Gao, Shuaihe2; Bai, Yan2; Pan, Zhibing2; Liu, Yinhua2; Lu, Xiaochun1,2; Zhang, Shougang1,2
刊名REMOTE SENSING
出版日期2022-02-01
卷号14期号:3页码:15
关键词low-orbit spacecraft new generation of high-performance time-frequency payloads microwave two-way time synchronization
DOI10.3390/rs14030528
英文摘要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.
WOS关键词SATELLITES
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]
WOS研究方向Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
语种英语
WOS记录号WOS:000760079200001
出版者MDPI
资助机构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
源URL[http://210.72.145.45/handle/361003/13917]  
专题国家授时中心_导航与通信研究室
通讯作者Gao, Shuaihe
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,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.

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来源：国家授时中心

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