Satellite Positioning and Orbit Determination System (SPODS): Introduction and Evaluation

doi:10.11947/j.JGGS.2018.0103

Journal of Geodesy and Geoinformation Science ›› 2018, Vol. 1 ›› Issue (1): 25-29.doi: 10.11947/j.JGGS.2018.0103

Satellite Positioning and Orbit Determination System (SPODS): Introduction and Evaluation

Ziqing WEI^1,²,Rengui RUAN^1,²,Xiaolin JIA^1,²,Xianbing WU^1,²,Xiaoyong SONG^1,²,Yue MAO^1,²,Laiping FENG^1,²,Yongxing ZHU^1,²

1. Xi’an Research Institute of Surveying and Mapping, Xi’an 710054,China
2. State Key Laboratory of Geo?Information Engineering, Xi’an 710054, China

Received:2016-06-07 Accepted:2017-07-09 Online:2018-12-20 Published:2019-11-20
About author:Ziqing WEI(1937—), male, researcher of Xi’an Research Institute of Surveying and Mapping, academician of Chinese Academy of Engineering, majors in geodetic coordinates system, geodetic boundary value problem and GNSS.

Abstract

Abstract:

The Satellite Positioning and Orbit Determination System (SPODS) is a software package for GNSS positioning/orbit determination, developed by the Xi’an Research Institute of Surveying and Mapping. So far it has been able to analyse GPS data and has the capability of high precision GPS positioning and orbit determination. The underlying theory and the performance evaluation are briefly addressed in this paper. The experiments are carried out with GPS data collected from about 127 IGS stations during 4~10 January 2009. The results show that the RMS 1D difference is 1.1cm between SPODS orbits and final IGS combined orbits, and that the repeatability of daily solutions of station coordinates is 1.5mm for horizontal components, and 4.5mm for vertical component, and that the consistency of ERP solutions with IGS final products is 0.025mas, 0.093 mas and 0.013ms/d respectively for pole coordinates and LOD.

Key words: GNSS; precise positioning; precise orbit determination; ERP determination; SPODS

Ziqing WEI,Rengui RUAN,Xiaolin JIA,Xianbing WU,Xiaoyong SONG,Yue MAO,Laiping FENG,Yongxing ZHU. Satellite Positioning and Orbit Determination System (SPODS): Introduction and Evaluation[J]. Journal of Geodesy and Geoinformation Science, 2018, 1(1): 25-29.

Figures/Tables 6

Fig.1

Fig.2

Fig.3

Fig.4

Fig.5

Tab.1

Differences between ERP solutions and IGS final ERP values"

DOY	x_p (μas)	y_p (μas)	$x ˙ p$ (μas/d)	$y ˙ p$ (μas/d)	LOD (0.1μs/d)
4	-36	-84	-80	-83	68
5	-9	-96	127	-102	149
6	-21	-90	200	-30	197
7	18	-93	-3	95	-72
8	12	-73	197	-13	115
9	29	-115	162	45	-10
10	36	-94	159	-164	-202

Tab.1

References 13

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Satellite Positioning and Orbit Determination System (SPODS): Introduction and Evaluation

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