Research on variation test of atomic time based on observation

doi:10.7498/aps.72.20222208

NTSC-IR > 守时理论与方法研究室

	Research on variation test of atomic time based on observation
	Han, Meng-Na 1,2; Tong, Ming-Lei1,2
	2023-04-05
发表期刊	ACTA PHYSICA SINICA
ISSN	1000-3290
卷号	72 期号:7 页码:10
摘要	Pulsar time (PT) has high long-term stability, and its establishment process is completely different from that of atomic time (AT). Therefore, pulsar-based time scale can be used as an independent test for the fluctuation of atomic time scale. In this paper, the test results of the fluctuation of atomic time using pulsar time are presented in combination with the real clock difference data. In order to test the fluctuation of atomic time, the timing model parameters of four pulsars are used to simulate the pulse times of arrival (TOAs) data with TT(BIPM19) as the reference, and then the reference time is changed from TT(BIPM19) to TT(TAI). Based on this, the classical weighted average algorithm and the Wiener filtering algorithm are used to extract the variations of the atomic time relative to the pulsar time. The test results obtained by the two methods are compared, and it shows that the Wiener filtering algorithm is better than the weighted average algorithm for the extraction of the fluctuation of the atomic time. The wavelet threshold denoising method is added to the clock difference signal extracted by the Wiener filtering algorithm to deduct the high-frequency noise. After denoising, PT is closer to TT(BIPM19), which further improves the ability of PT to detect the fluctuation of AT. For the TOA measurement accuracy of 100 ns, the difference between PT and TT(BIPM19) can be kept roughly within 40 ns. This paper studies the method of further improving the accuracy of PT under the premise of given TOA measurement accuracy, which is of great significance for the next step to use PT for more effective application of time keeping.
关键词	pulsar time atomic time clock difference timing residual
资助者	SKA Project of the Ministry of Science and Technology of China ; SKA Project of the Ministry of Science and Technology of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; SKA Project of the Ministry of Science and Technology of China ; SKA Project of the Ministry of Science and Technology of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; SKA Project of the Ministry of Science and Technology of China ; SKA Project of the Ministry of Science and Technology of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; SKA Project of the Ministry of Science and Technology of China ; SKA Project of the Ministry of Science and Technology of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
DOI	10.7498/aps.72.20222208
关键词[WOS]	PULSAR ; EQUATIONS
语种	英语
资助项目	SKA Project of the Ministry of Science and Technology of China[2020SKA0120103] ; National Natural Science Foundation of China[U1831130]
资助者	SKA Project of the Ministry of Science and Technology of China ; SKA Project of the Ministry of Science and Technology of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; SKA Project of the Ministry of Science and Technology of China ; SKA Project of the Ministry of Science and Technology of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; SKA Project of the Ministry of Science and Technology of China ; SKA Project of the Ministry of Science and Technology of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; SKA Project of the Ministry of Science and Technology of China ; SKA Project of the Ministry of Science and Technology of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS研究方向	Physics
WOS类目	Physics, Multidisciplinary
WOS记录号	WOS:000985790500010
出版者	CHINESE PHYSICAL SOC
引用统计
文献类型	期刊论文
条目标识符	http://210.72.145.45/handle/361003/14226
专题	守时理论与方法研究室
通讯作者	Tong, Ming-Lei
作者单位	1.Chinese Acad Sci, Natl Time Serv Ctr, Xian 710600, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Han, Meng-Na,Tong, Ming-Lei. Research on variation test of atomic time based on observation[J]. ACTA PHYSICA SINICA,2023,72(7):10.
APA	Han, Meng-Na,&Tong, Ming-Lei.(2023).Research on variation test of atomic time based on observation.ACTA PHYSICA SINICA,72(7),10.
MLA	Han, Meng-Na,et al."Research on variation test of atomic time based on observation".ACTA PHYSICA SINICA 72.7(2023):10.