Modeling and assessment of real-time precise point positioning timing with multi-GNSS observations

doi:10.1088/1361-6501/ab7790

	Modeling and assessment of real-time precise point positioning timing with multi-GNSS observations
	Ge,Yulong 1,2,3; Ding,Shuo 1,2,3; Dai,Peipei 1,2,3; Qin,WeiJin 1,3; Yang,Xuhai 1,3,4
	2020-04-03
发表期刊	Measurement Science and Technology
ISSN	0957-0233
卷号	31 期号:6
摘要	AbstractReal-time precise point positioning (PPP) method is of great interest for global navigation satellite systems (GNSS) time application with multi-GNSS observations. In this study, a multi-GNSS precise timing approach using Centre National d’Etudes Spatiales (CNES) real-time products was presented to improve the reliable of precise timing. Users can obtain the difference between the local time (time of rover receiver) and UTC(k) directly using a GNSS receiver, once the CNES products are aligned to UTC(k) by a multi-GNSS PPP approach. In other words, the reference times of the realigned products for GPS, GLONASS, BDS-2 and Galileo are UTC (k). Then, users can obtain the difference between the local time and UTC(k) directly using any single-system or multi-GNSS combination. Note that the receiver hardware delay needs to be calibrated before timing application. Numerical analyses clarify how the multi-GNSS precise timing approach performs. First, the standard deviation (STD) of the difference between the multi-GNSS timing results and the clock difference from the IGS final products is shown to be less than 0.5 ns. The multi-GNSS solutions outperform that of a single system. Furthermore, GPS-only PPP timing solutions perform better than that of GLONASS and Galileo-only. In addition, the maximum reductions of STD values are up to 33.6%, 11.6%, 14.6%, 25.6% for GPS-only, GLONASS-only, Galileo-only and multi-GNSS timing, respectively, using a receiver clock model. Second, the frequency stability of the multi-GNSS scheme is slightly better than GPS-only. For single-system PPP timing, GLONASS-only performs worst, while GPS-only performs best. The maximum improvements of frequency stability are up to 61.9%, 67.1%, 90.6%, 65.8% for GPS-only, GLONASS-only, Galileo-only and multi-GNSS timing, respectively, with a receiver clock model using the realigned products. More interestingly, we found that the performance Galileo-only was improved with the observations on 2019 as compared to Galileo with the observations on 2018.
关键词	precise timing multi-GNSS real-time products precise point positioning
DOI	10.1088/1361-6501/ab7790
语种	英语
WOS记录号	IOP:0957-0233-31-6-ab7790
出版者	IOP Publishing
引用统计
文献类型	期刊论文
条目标识符	http://210.72.145.45/handle/361003/9369
专题	高精度时间传递与精密测定轨研究室
通讯作者	Ge,Yulong
作者单位	1.National Time Service Center, Chinese Academy of Sciences, Xi’an 710600, People’s Republic of China 2.University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China 3.Key Laboratory of Precise Positioning and Timing Technology, Chinese Academy of Sciences, Xi’an 710600, People’s Republic of China 4.School of Geomatics, Anhui University of Science & Technology, Huainan 232001, People’s Republic of China
推荐引用方式 GB/T 7714	Ge,Yulong,Ding,Shuo,Dai,Peipei,et al. Modeling and assessment of real-time precise point positioning timing with multi-GNSS observations[J]. Measurement Science and Technology,2020,31(6).
APA	Ge,Yulong,Ding,Shuo,Dai,Peipei,Qin,WeiJin,&Yang,Xuhai.(2020).Modeling and assessment of real-time precise point positioning timing with multi-GNSS observations.Measurement Science and Technology,31(6).
MLA	Ge,Yulong,et al."Modeling and assessment of real-time precise point positioning timing with multi-GNSS observations".Measurement Science and Technology 31.6(2020).