Applications of two-way satellite time and frequency transfer in the BeiDou navigation satellite system

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	Applications of two-way satellite time and frequency transfer in the BeiDou navigation satellite system
	Zhou ShanShi 1; Hu XiaoGong 1; Liu Li 2; Guo Rui 2; Zhu LingFeng 2; Chang ZhiQiao 2; Tang ChengPan 1; Gong XiuQiang 1; Li Ran1 ; Yu Yang 1
	2016
Source Publication	SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
ISSN	1674-7348
Volume	59 Issue:10
Abstract	A two-way satellite time and frequency transfer (TWSTFT) device equipped in the BeiDou navigation satellite system (BDS) can calculate clock error between satellite and ground master clock. TWSTFT is a real-time method with high accuracy because most system errors such as orbital error, station position error, and tropospheric and ionospheric delay error can be eliminated by calculating the two-way pseudorange difference. Another method, the multi-satellite precision orbit determination (MPOD) method, can be applied to estimate satellite clock errors. By comparison with MPOD clock estimations, this paper discusses the applications of the BDS TWSTFT clock observations in satellite clock measurement, satellite clock prediction, navigation system time monitor, and satellite clock performance assessment in orbit. The results show that with TWSTFT clock observations, the accuracy of satellite clock prediction is higher than MPOD. Five continuous weeks of comparisons with three international GNSS Service (IGS) analysis centers (ACs) show that the reference time difference between BeiDou time (BDT) and golbal positoning system (GPS) time (GPST) realized IGS ACs is in the tens of nanoseconds. Applying the TWSTFT clock error observations may obtain more accurate satellite clock performance evaluation in the 10(4) s interval because the accuracy of the MPOD clock estimation is not sufficiently high. By comparing the BDS and GPS satellite clock performance, we found that the BDS clock stability at the 10(3) s interval is approximately 10(-12), which is similar to the GPS IIR.
Keyword	ORBIT BDS TWSTFT satellite clock prediction accuracy system reference time Allan variance
Language	英语
Funding Project	[National Natural Sciences Foundation of China] ; [Youth Innovation Promotion Association CAS]
Document Type	期刊论文
Identifier	http://ir.bao.ac.cn/handle/114a11/63212
Collection	中国科学院国家天文台
Affiliation	1.中国科学院国家天文台 2.Beijing Satellite Nav Ctr, Beijing 100094, Peoples R China
First Author Affilication	National Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation GB/T 7714	Zhou ShanShi,Hu XiaoGong,Liu Li,et al. Applications of two-way satellite time and frequency transfer in the BeiDou navigation satellite system[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2016,59(10).
APA	Zhou ShanShi.,Hu XiaoGong.,Liu Li.,Guo Rui.,Zhu LingFeng.,...&Yu Yang.(2016).Applications of two-way satellite time and frequency transfer in the BeiDou navigation satellite system.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,59(10).
MLA	Zhou ShanShi,et al."Applications of two-way satellite time and frequency transfer in the BeiDou navigation satellite system".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 59.10(2016).

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