Research on Time Scale Algorithm Based on Hydrogen Masers

	Research on Time Scale Algorithm Based on Hydrogen Masers
	Jiang, Meng 4; Dong, Shaowu 2,3; Wu, Wenjun 1,4
刊名	IEEE INSTRUMENTATION & MEASUREMENT MAGAZINE
	2020-08-01
卷号	23 期号:5 页码:35-40
关键词	Hydrogen Masers Time-frequency analysis Frequency estimation Atomic clocks Estimation
ISSN号	1094-6969
英文摘要	In order to ensure the long-term stability of the time scale, the traditional timekeeping clock ensemble is mainly composed of a cesium clock and a few hydrogen masers. Since 2014, the Bureau International des Poids et Mesures (BIPM) has changed the weighting method of atomic clocks, using the predictability of atomic clocks to weight the global atomic clocks to obtain the International Atomic Time (TAI) and Coordinated Universal Time (UTC). Because of the good predictability of hydrogen masers, less than one third of the number of atomic clocks in TAI/UTC calculation is hydrogen masers which has gained 75% weight. Effective utilization of hydrogen masers has become a research hotspot in timekeeping laboratories. In order to give full play to the advantages of hydrogen masers in timekeeping, the time scale of hydrogen masers is tested in this paper. Firstly, the frequency drift parameters of hydrogen masers are dynamically estimated by using the minimum error theory. Then the estimated parameters are applied to a real-time exponential filtering time scale algorithm. The results show that the stability of the time scale produced by this method can reach 6e-15/day, and the absolute maximum deviation from TA(NTSC) within a month can be kept within 5 ns, which is better than the time scales produced by a traditional fixed frequency drift parameters method and the classical weighted averaging algorithm ALGOS.
资助项目	National Natural Science Foundation of China[11703030] ; CAS "Light of West China" program[XAB2017A06]
WOS研究方向	Engineering ; Instruments & Instrumentation
语种	英语
出版者	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
WOS记录号	WOS:000562029100006
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 ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS "Light of West China" program ; CAS "Light of West China" program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS "Light of West China" program ; CAS "Light of West China" program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS "Light of West China" program ; CAS "Light of West China" program
内容类型	期刊论文
源URL	[http://210.72.145.45/handle/361003/9396]
专题	中国科学院国家授时中心
通讯作者	Jiang, Meng
作者单位	1.BIPM, UTC Time Link Calibrat, Sevres, France 2.Natl Time Serv Ctr, Timekeeping Lab, Xian, Peoples R China 3.Natl Time Serv Ctr, Xian, Peoples R China 4.Chinese Acad Sci, Natl Time Serv Ctr, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Meng,Dong, Shaowu,Wu, Wenjun. Research on Time Scale Algorithm Based on Hydrogen Masers[J]. IEEE INSTRUMENTATION & MEASUREMENT MAGAZINE,2020,23(5):35-40.
APA	Jiang, Meng,Dong, Shaowu,&Wu, Wenjun.(2020).Research on Time Scale Algorithm Based on Hydrogen Masers.IEEE INSTRUMENTATION & MEASUREMENT MAGAZINE,23(5),35-40.
MLA	Jiang, Meng,et al."Research on Time Scale Algorithm Based on Hydrogen Masers".IEEE INSTRUMENTATION & MEASUREMENT MAGAZINE 23.5(2020):35-40.