NAOC Open IR
Orbit determination and time synchronization for a GEO/IGSO satellite navigation constellation with regional tracking network
Zhou ShanShi1; Hu XiaoGong1; Wu Bin1; Liu Li3; Qu WeiJing1; Guo Rui3; He Feng3; Cao YueLing1; Wu XiaoLi3; Zhu LingFeng3; Shi Xin3; Tan HongLi3
2011
Source PublicationSCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
ISSN1674-7348
Volume54Issue:6Pages:1089
AbstractAiming at regional services, the space segment of COMPASS (Phase I) satellite navigation system is a constellation of Geostationary Earth Orbit (GEO), Inclined Geostationary Earth Orbit (IGSO) and Medium Earth Orbit (MEO) satellites. Precise orbit determination (POD) for the satellites is limited by the geographic distribution of regional tracking stations. Independent time synchronization (TS) system is developed to supplement the regional tracking network, and satellite clock errors and orbit data may be obtained by simultaneously processing both tracking data and TS data. Consequently, inconsistency between tracking system and TS system caused by remaining instrumental errors not calibrated may decrease navigation accuracy. On the other hand, POD for the mixed constellation of GEO/IGSO/MEO with the regional tracking network leads to parameter estimations that are highly correlated. Notorious example of correlation is found between GEO's orbital elements and its clock errors. We estimate orbital elements and clock errors for a 3GEO+2IGSO constellation in this study using a multi-satellite precise orbit determination (MPOD) strategy, with which clock error elimination algorithm is applied to separate orbital and clock estimates to improve numerical efficiency. Satellite Laser Ranging (SLR) data are used to evaluate User Ranging Error (URE), which is the orbital error projected on a receiver's line-of-sight direction. Two-way radio-wave time transfer measurements are used to evaluate clock errors. Experimenting with data from the regional tracking network, we conclude that the fitting of code data is better than 1 m in terms of Root-Mean-Square (RMS), and fitting of carrier phase is better than 1 cm. For orbital evaluation, difference between computed receiver-satellite ranging based on estimated orbits and SLR measurements is better than 1 m (RMS). For clock estimates evaluation, 2-hour linear-fitting shows that the satellite clock rates are about 1.E-10 s/s, while receiver clock rates are about 1x10(-13)-1x10(-12) s/s. For the 72-hour POD experiment, the average differences between POD satellite clock rates estimates and clock measurements based on TS system are about 1x10(-13) s/s, and for receiver clock rates, the differences are about 1x10(-15) s/s.
KeywordPOD time synchronization clock errors elimination SLR evaluation
Language英语
Funding Project[Shanghai Committee of Science and Technology, China] ; [National Natural Science Foundation of China]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/68945
Collection中国科学院国家天文台
Affiliation1.中国科学院国家天文台
2.中国科学院
3.Beijing Global Informat Applicat & Dev Ctr, Beijing 100094, Peoples R China
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhou ShanShi,Hu XiaoGong,Wu Bin,et al. Orbit determination and time synchronization for a GEO/IGSO satellite navigation constellation with regional tracking network[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2011,54(6):1089.
APA Zhou ShanShi.,Hu XiaoGong.,Wu Bin.,Liu Li.,Qu WeiJing.,...&Tan HongLi.(2011).Orbit determination and time synchronization for a GEO/IGSO satellite navigation constellation with regional tracking network.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,54(6),1089.
MLA Zhou ShanShi,et al."Orbit determination and time synchronization for a GEO/IGSO satellite navigation constellation with regional tracking network".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 54.6(2011):1089.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Zhou ShanShi]'s Articles
[Hu XiaoGong]'s Articles
[Wu Bin]'s Articles
Baidu academic
Similar articles in Baidu academic
[Zhou ShanShi]'s Articles
[Hu XiaoGong]'s Articles
[Wu Bin]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Zhou ShanShi]'s Articles
[Hu XiaoGong]'s Articles
[Wu Bin]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.