Performance of Galileo: Global coverage, precise orbit determination, and precise positioning

doi:10.1016/j.asr.2019.03.042

	Performance of Galileo: Global coverage, precise orbit determination, and precise positioning
	Zhang, Rui 1,2; Tu, Rui 1,2,3; Liu, Jinhai 1,3; Hong, Ju 1,3; Fan, Lihong 1,2; Zhang, Pengfei 1,3; Lu, Xiaochun 1,2,3
刊名	ADVANCES IN SPACE RESEARCH
	2019-07-15
卷号	64 期号:2 页码:299-313
关键词	Galileo Average satellite coverage Precise Orbit Determination (POD) Clock estimation Precise Point Positioning (PPP) Baseline solution
ISSN号	0273-1177
DOI	10.1016/j.asr.2019.03.042
英文摘要	As one of the major global navigation satellite systems (GNSSs), the performance of the Galileo Satellite Navigation System (Galileo) has been of pressing concern. By the end of June 2018, there were 17 operational satellites that provide navigation and positioning services. However, there is little research evaluating the performance of the Galileo single-system in terms of the average satellite coverage and precise positioning. To address this, this study firstly uses the number of visible satellites to analyze the global average satellite coverage of Galileo. Then different data processing strategies are used to evaluate the accuracy of the Galileo satellite orbit and clock. Finally, the performances of precise point positioning (PPP) and baseline solutions obtained using the Galileo single-system are analyzed. Results show that the number of visible Galileo satellites globally is between 6 and 7 and the time percentage where the number of visible Galileo satellites is greater than or equal to 4 is more than 90% globally. For the orbit determination of Galileo satellites, the Galileo/GPS combined solution is better than that of the Galileo single-system. Using the GeoForschungsZentrum Potsdam (GFZ) multi-GNSS orbit product (indicated by GBM) as a reference, the root mean squares (RMSs) of three-dimension and radial component of Galileo/GPS three-day combined solution are 4.4 cm and 1.8 cm, respectively. The accuracy of the Galileo/GPS single-day combined solution is almost the same as that of the Galileo/GPS three-day combined solution. For the Galileo satellite clock, the Galileo/GPS combined solution provides a better result than the Galileo single-system solution. The convergence times of the static and kinematic PPP solutions of the Galileo single-system are both about 2 h. The average the RMSs of the east (E), north (N), and up (U) components of the static Galileo-only PPP solution are 1.9 cm, 0.5 cm, and 2.0 cm, respectively. Those of the kinematic Galileo-only PPP solution are 2.1 cm, 1.4 cm, and 2.6 cm, respectively. Moreover, the baseline solution accuracy of the ultra-short baseline (48 m) of the Galileo single system is comparable to GPS. For both static and kinematic solutions, the standard deviations (STDs) of the horizontal and vertical components are better than 6 mm and 8 mm, respectively. The accuracy of baseline solution results of the short baseline (1850 m) is poorer. For both static and kinematic solutions, the STDs of the horizontal and vertical components are better than 1.3 cm and 1.9 cm, respectively. (C) 2019 COSPAR. Published by Elsevier Ltd. All rights reserved.
资助项目	Chinese Academy of Sciences (CAS)[Y712YR4701] ; National Natural Science Foundation of China[41504006] ; National Natural Science Foundation of China[41674034] ; National Key Research and Development Plan of China[2016YFB0501804] ; CAS[QYZDB-SSW-DQC028] ; National Time Service Center (NTSC)[Y824SC1S06]
WOS关键词	INTERNATIONAL GNSS SERVICE ; IGS ; PRESSURE ; MODEL ; PRODUCTS
WOS研究方向	Astronomy & Astrophysics ; Geology ; Meteorology & Atmospheric Sciences
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000472699000001
资助机构	Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Plan of China ; National Key Research and Development Plan of China ; CAS ; CAS ; National Time Service Center (NTSC) ; National Time Service Center (NTSC) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Plan of China ; National Key Research and Development Plan of China ; CAS ; CAS ; National Time Service Center (NTSC) ; National Time Service Center (NTSC) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Plan of China ; National Key Research and Development Plan of China ; CAS ; CAS ; National Time Service Center (NTSC) ; National Time Service Center (NTSC) ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key Research and Development Plan of China ; National Key Research and Development Plan of China ; CAS ; CAS ; National Time Service Center (NTSC) ; National Time Service Center (NTSC)
内容类型	期刊论文
源URL	[http://210.72.145.45/handle/361003/11945]
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, Shuyuan Rd, Xian 710600, Shaanxi, Peoples R China 2.Chinese Acad Sci, Key Lab Precis Nav Positioning & Timing Technol, Shuyuan Rd, Xian 710600, Shaanxi, Peoples R China 3.Univ Chinese Acad Sci, Yuquan Rd, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Rui,Tu, Rui,Liu, Jinhai,et al. Performance of Galileo: Global coverage, precise orbit determination, and precise positioning[J]. ADVANCES IN SPACE RESEARCH,2019,64(2):299-313.
APA	Zhang, Rui.,Tu, Rui.,Liu, Jinhai.,Hong, Ju.,Fan, Lihong.,...&Lu, Xiaochun.(2019).Performance of Galileo: Global coverage, precise orbit determination, and precise positioning.ADVANCES IN SPACE RESEARCH,64(2),299-313.
MLA	Zhang, Rui,et al."Performance of Galileo: Global coverage, precise orbit determination, and precise positioning".ADVANCES IN SPACE RESEARCH 64.2(2019):299-313.