Performance of Multi-GNSS Precise Point Positioning Time and Frequency Transfer with Clock Modeling

doi:10.3390/rs11030347

	Performance of Multi-GNSS Precise Point Positioning Time and Frequency Transfer with Clock Modeling
	Ge, Yulong 1,2,3; Dai, Peipei 1,2,3; Qin, Weijin 1,3; Yang, Xuhai 1,3,4; Zhou, Feng 5; Wang, Shengli 6; Zhao, Xingwang 7
刊名	REMOTE SENSING
	2019-02-01
卷号	11 期号:3 页码:21
关键词	multi-GNSS precise point positioning (PPP) time and frequency transfer receiver clock offset modeling
ISSN号	2072-4292
DOI	10.3390/rs11030347
英文摘要	Thanks to the international GNSS service (IGS), which has provided multi-GNSS precise products, multi-GNSS precise point positioning (PPP) time and frequency transfer has of great interest in the timing community. Currently, multi-GNSS PPP time transfer is not investigated with different precise products. In addition, the correlation of the receiver clock offsets between adjacent epochs has not been studied in multi-GNSS PPP. In this work, multi-GNSS PPP time and frequency with different precise products is first compared in detail. A receiver clock offset model, considering the correlation of the receiver clock offsets between adjacent epochs using an a priori value, is then employed to improve multi-GNSS PPP time and frequency (scheme2). Our numerical analysis clarify how the approach performs for multi-GNSS PPP time and frequency transfer. Based on two commonly used multi-GNSS products and six GNSS stations, three conclusions are obtained straightforwardly. First, the GPS-only, Galileo-only, and multi-GNSS PPP solutions show similar performances using GBM and COD products, while BDS-only PPP using GBM products is better than that using COD products. Second, multi-GNSS time transfer outperforms single GNSS by increasing the number of available satellites and improving the time dilution of precision. For single-system and multi-GNSS PPP with GBM products, the maximum improvement in root mean square (RMS) values for multi-GNSS solutions are up to 7.4%, 94.0%, and 57.3% compared to GPS-only, BDS-only, and Galileo-only solutions, respectively. For stability, the maximum improvement of multi-GNSS is 20.3%, 84%, and 45.4% compared to GPS-only, BDS-only and Galileo-only solutions. Third, our approach contains less noise compared to the solutions with the white noise model, both for the single-system model and the multi-GNSS model. The RMS values of our approach are improved by 37.8-91.9%, 10.5-65.8%, 2.7-43.1%, and 26.6-86.0% for GPS-only, BDS-only, Galileo-only, and multi-GNSS solutions. For frequency stability, the improvement of scheme2 ranges from 0.2 to 51.6%, from 3 to 80.0%, from 0.2 to 70.8%, and from 0.1 to 51.5% for GPS-only, BDS-only, Galileo-only, and multi-GNSS PPP solutions compared to the solutions with the white noise model in the Eurasia links.
资助项目	National Natural Science Foundation of China[41104021] ; National Natural Science Foundation of China[11173026] ; National Natural Science Foundation of China[41704008] ; National Natural Science Foundation of China[11703033] ; Program for Excellent Talents in University of Anhui Province of China[gxyq2017008]
WOS关键词	ALL-IN-VIEW ; GPS ; GLONASS ; BEIDOU
WOS研究方向	Remote Sensing
语种	英语
出版者	MDPI
WOS记录号	WOS:000459944400135
资助机构	National Natural Science Foundation of China ; National Natural Science Foundation of China ; Program for Excellent Talents in University of Anhui Province of China ; Program for Excellent Talents in University of Anhui Province of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Program for Excellent Talents in University of Anhui Province of China ; Program for Excellent Talents in University of Anhui Province of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Program for Excellent Talents in University of Anhui Province of China ; Program for Excellent Talents in University of Anhui Province of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Program for Excellent Talents in University of Anhui Province of China ; Program for Excellent Talents in University of Anhui Province of China
内容类型	期刊论文
源URL	[http://210.72.145.45/handle/361003/11831]
专题	中国科学院国家授时中心
通讯作者	Ge, Yulong; Yang, Xuhai
作者单位	1.Chinese Acad Sci, Natl Time Serv Ctr, Xian 710600, Shaanxi, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Key Lab Precise Positioning & Timing Technol, Xian 710600, Shaanxi, Peoples R China 4.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China 5.Shandong Univ Sci & Technol, Coll Geomat, Qingdao 266590, Peoples R China 6.Shandong Univ Sci & Technol, Inst Ocean Engn, Qingdao 266000, Peoples R China 7.Anhui Univ Sci & Technol, Sch Geomat, Huainan 232001, Peoples R China
推荐引用方式 GB/T 7714	Ge, Yulong,Dai, Peipei,Qin, Weijin,et al. Performance of Multi-GNSS Precise Point Positioning Time and Frequency Transfer with Clock Modeling[J]. REMOTE SENSING,2019,11(3):21.
APA	Ge, Yulong.,Dai, Peipei.,Qin, Weijin.,Yang, Xuhai.,Zhou, Feng.,...&Zhao, Xingwang.(2019).Performance of Multi-GNSS Precise Point Positioning Time and Frequency Transfer with Clock Modeling.REMOTE SENSING,11(3),21.
MLA	Ge, Yulong,et al."Performance of Multi-GNSS Precise Point Positioning Time and Frequency Transfer with Clock Modeling".REMOTE SENSING 11.3(2019):21.