Improving the Performance of Multi-GNSS Time and Frequency Transfer Using Robust Helmert Variance Component Estimation

doi:10.3390/s18092878

NTSC-IR

	Improving the Performance of Multi-GNSS Time and Frequency Transfer Using Robust Helmert Variance Component Estimation
	Zhang, Pengfei 1,2,3; Tu, Rui 1,3,4; Gao, Yuping1,2 ; Zhang, Rui 1,4; Liu, Na1,2,3
	2018-09-01
发表期刊	SENSORS
ISSN	1424-8220
卷号	18 期号:9 页码:13
摘要	The combination of multiple Global Navigation Satellite Systems (GNSSs) may improve the performance of time and frequency transfers by increasing the number of available satellites and improving the time dilution of precision. However, the receiver clock estimation is easily affected by the inappropriate weight of multi-GNSSs due to the different characteristics of individual GNSS signals as well as the outliers from observations. Thus, we utilised a robust Helmert variance component estimation (RVCE) approach to determine the appropriate weights of different GNSS observations, and to control for the influence of outliers in these observation in multi-GNSS time and frequency transfer. In order to validate the effectiveness of this approach, four time links were employed. Compared to traditional solutions, the mean improvement of smoothed residuals is 3.43% using the RVCE approach. With respect to the frequency stability of the time links, the RVCE solution outperforms the traditional solution, particularly in the short-term, and the mean improvement is markedly high at 14.89%.
关键词	time and frequency transfer multi-GNSS robust estimation Helmert variance component
资助者	National Key Research and Development Plan of China ; National Key Research and Development Plan of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; National Time Service Centre (NTSC) ; National Time Service Centre (NTSC) ; National Key Research and Development Plan of China ; National Key Research and Development Plan of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; National Time Service Centre (NTSC) ; National Time Service Centre (NTSC) ; National Key Research and Development Plan of China ; National Key Research and Development Plan of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; National Time Service Centre (NTSC) ; National Time Service Centre (NTSC) ; National Key Research and Development Plan of China ; National Key Research and Development Plan of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; National Time Service Centre (NTSC) ; National Time Service Centre (NTSC)
DOI	10.3390/s18092878
关键词[WOS]	COMBINING GPS ; GLONASS ; PHASE ; BEIDOU ; VIEW
语种	英语
资助项目	National Key Research and Development Plan of China[2016YFB0501804] ; National Natural Science Foundation of China[41504006] ; National Natural Science Foundation of China[41674034] ; Chinese Academy of Sciences (CAS)[Y620YC1701] ; Chinese Academy of Sciences (CAS)[Y712YR4701] ; National Time Service Centre (NTSC)[Y824SC1S06] ; National Time Service Centre (NTSC)[QYZDB-SSW-DQC028]
资助者	National Key Research and Development Plan of China ; National Key Research and Development Plan of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; National Time Service Centre (NTSC) ; National Time Service Centre (NTSC) ; National Key Research and Development Plan of China ; National Key Research and Development Plan of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; National Time Service Centre (NTSC) ; National Time Service Centre (NTSC) ; National Key Research and Development Plan of China ; National Key Research and Development Plan of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; National Time Service Centre (NTSC) ; National Time Service Centre (NTSC) ; National Key Research and Development Plan of China ; National Key Research and Development Plan of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; National Time Service Centre (NTSC) ; National Time Service Centre (NTSC)
WOS研究方向	Chemistry ; Electrochemistry ; Instruments & Instrumentation
WOS类目	Chemistry, Analytical ; Electrochemistry ; Instruments & Instrumentation
WOS记录号	WOS:000446940600137
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/361003/11698
专题	中国科学院国家授时中心
通讯作者	Tu, Rui
作者单位	1.Chinese Acad Sci, Natl Time Serv Ctr, Shu Yuan Rd, Xian 710600, Shaanxi, Peoples R China 2.Chinese Acad Sci, Key Lab Time & Frequency Primary Stand, Xian 710600, Shaanxi, Peoples R China 3.Univ Chinese Acad Sci, Yu Quan Rd, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Key Lab Precis Nav Positioning & Timing Technol, Xian 710600, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Pengfei,Tu, Rui,Gao, Yuping,et al. Improving the Performance of Multi-GNSS Time and Frequency Transfer Using Robust Helmert Variance Component Estimation[J]. SENSORS,2018,18(9):13.
APA	Zhang, Pengfei,Tu, Rui,Gao, Yuping,Zhang, Rui,&Liu, Na.(2018).Improving the Performance of Multi-GNSS Time and Frequency Transfer Using Robust Helmert Variance Component Estimation.SENSORS,18(9),13.
MLA	Zhang, Pengfei,et al."Improving the Performance of Multi-GNSS Time and Frequency Transfer Using Robust Helmert Variance Component Estimation".SENSORS 18.9(2018):13.