NAOC Open IR
Combination of terrestrial reference frames based on space geodetic techniques in SHAO: methodology and main issues
He Bing1; Wang XiaoYa1; Hu XiaoGong1; Zhao QunHe1
2017
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
ISSN1674-4527
Volume17Issue:9
AbstractBased on years of input from the four geodetic techniques (SLR, GPS, VLBI and DORIS), the strategies of the combination were studied in SHAO to generate a new global terrestrial reference frame as the material realization of the ITRS defined in IERS Conventions. The main input includes the time series of weekly solutions (or fortnightly for SLR 1983-1993) of observational data for satellite techniques and session-wise normal equations for VLBI. The set of estimated unknowns includes 3-dimensional Cartesian coordinates at the reference epoch 2005.0 of the stations distributed globally and their rates as well as the time series of consistent Earth Orientation Parameters (EOPs) at the same epochs as the input. Besides the final solution, namely SOL-2, generated by using all the inputs before 2015.0 obtained fromshort-termobservation processing, another reference solution, namely SOL-1, was also computed by using the input before 2009.0 based on the same combination of procedures for the purpose of comparison with ITRF2008 and DTRF2008 and for evaluating the effect of the latest six more years of data on the combined results. The estimated accuracy of the x-component and y-component of the SOL-1 TRF-origin was better than 0.1 mm at epoch 2005.0 and better than 0.3 mm yr(-1) in time evolution, either compared with ITRF2008 or DTRF2008. However, the z-component of the translation parameters from SOL-1 to ITRF2008 and DTRF2008 were 3.4 mm and -1.0 mm, respectively. It seems that the z-component of the SOL-1 TRF-origin was much closer to the one in DTRF2008 than the one in ITRF2008. The translation parameters from SOL-2 to ITRF2014 were 2.2, -1.8 and 0.9 mm in the x-, y -and z-components respectively with rates smaller than 0.4 mm yr(-1). Similarly, the scale factor transformed from SOL-1 to DTRF2008 was much smaller than that to ITRF2008. The scale parameter from SOL-2 to ITRF2014 was -0.31 ppb with a rate lower than 0.01 ppb yr(-1). The external precision (WRMS) compared with IERS EOP 08 C04 of the combined EOP series was smaller than 0.06 mas for the polar motions, smaller than 0.01 ms for the UT1-UTC and smaller than 0.02 ms for the LODs. The precision of the EOPs in SOL-2 was slightly higher than that of SOL-1.
KeywordVLBI REALIZATION astrometry reference systems techniques: interferometers methods: data analysis
Language英语
Funding Project[Ministry of Science and Technology of China] ; [National Key Research and Development Program of China] ; [National Natural Science Foundation of China] ; [State Key Laboratory of Aerospace Dynamics] ; [Crustal Movement Observation Network of China (CMONOC)]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/73191
Collection中国科学院国家天文台
Affiliation1.中国科学院国家天文台
2.中国科学院大学
3.中国科学院地球环境研究所
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
He Bing,Wang XiaoYa,Hu XiaoGong,et al. Combination of terrestrial reference frames based on space geodetic techniques in SHAO: methodology and main issues[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2017,17(9).
APA He Bing,Wang XiaoYa,Hu XiaoGong,&Zhao QunHe.(2017).Combination of terrestrial reference frames based on space geodetic techniques in SHAO: methodology and main issues.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,17(9).
MLA He Bing,et al."Combination of terrestrial reference frames based on space geodetic techniques in SHAO: methodology and main issues".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 17.9(2017).
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
[He Bing]'s Articles
[Wang XiaoYa]'s Articles
[Hu XiaoGong]'s Articles
Baidu academic
Similar articles in Baidu academic
[He Bing]'s Articles
[Wang XiaoYa]'s Articles
[Hu XiaoGong]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[He Bing]'s Articles
[Wang XiaoYa]'s Articles
[Hu XiaoGong]'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.