Precise orbit determination and rapid orbit recovery supported by time synchronization

	Precise orbit determination and rapid orbit recovery supported by time synchronization
	Guo, Rui 1; Zhou, JianHua 1; Hu, XiaoGong2 ; Liu, Li1 ; Tang, Bo 1; Li, XiaoJie 1; Wu, Shan 1
刊名	ADVANCES IN SPACE RESEARCH
	2015-06-15
卷号	55 期号:12 页码:2889-2898
关键词	Time synchronization Precise orbit determination Clock offset Satellite laser ranging User equivalent range error
英文摘要	In order to maintain optimal signal coverage, GNSS satellites have to experience orbital maneuvers. For China's COMPASS system, precise orbit determination (POD) as well as rapid orbit recovery after maneuvers contribute to the overall Positioning, Navigation and Timing (PNT) service performance in terms of accuracy and availability. However, strong statistical correlations between clock offsets and the radial component of a satellite's positions require long data arcs for POD to converge. We propose here a new strategy which relies on time synchronization between ground tracking stations and in-orbit satellites. By fixing satellite clock offsets measured by the satellite station two-way synchronization (SSTS) systems and receiver clock offsets, POD and orbital recovery performance can be improved significantly. Using the Satellite Laser Ranging (SLR) as orbital accuracy evaluation, we find the 4-hr recovered orbit achieves about 0.71 m residual root mean square (RMS) error of fit SLR data, the recovery time is improved from 24-hr to 4-hr compared with the conventional POD without time synchronization support. In addition, SLR evaluation shows that for 1-hr prediction, about 1.47 m accuracy is achieved with the new proposed POD strategy. (C) 2015 COSPAR. Published by Elsevier Ltd. All rights reserved.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences
研究领域[WOS]	Astronomy & Astrophysics ; Geology ; Meteorology & Atmospheric Sciences
关键词[WOS]	GEOSTATIONARY SATELLITES ; MODEL
收录类别	SCI
语种	英语
WOS记录号	WOS:000355367600010
公开日期	2015-08-18
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/18347]
专题	上海天文台_天文地球动力学研究中心
作者单位	1.Beijing Satellite Nav Ctr, Beijing 100094, Peoples R China 2.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
推荐引用方式 GB/T 7714	Guo, Rui,Zhou, JianHua,Hu, XiaoGong,et al. Precise orbit determination and rapid orbit recovery supported by time synchronization[J]. ADVANCES IN SPACE RESEARCH,2015,55(12):2889-2898.
APA	Guo, Rui.,Zhou, JianHua.,Hu, XiaoGong.,Liu, Li.,Tang, Bo.,...&Wu, Shan.(2015).Precise orbit determination and rapid orbit recovery supported by time synchronization.ADVANCES IN SPACE RESEARCH,55(12),2889-2898.
MLA	Guo, Rui,et al."Precise orbit determination and rapid orbit recovery supported by time synchronization".ADVANCES IN SPACE RESEARCH 55.12(2015):2889-2898.