使用GINS软件进行VLBI分析,用于观察水平的多技术组合
VLBI analyses with the GINS software for multi-technique combination at the observation level
摘要:
目前,在法国空间大地测量研究小组(GRGS)的一个协调项目中,正在例行采用一种同时确定地球参考系和地球定向参数的严格方法。各种空间大地测量技术(VLBI、SLR、LLR、DORIS和GPS)的观测分别由不同的分析中心用法国国家空间研究中心(图卢兹)研制和维护的GINS-100软件包进行处理。该项目旨在促进全球地球系统的精细地球物理分析(全球地球观测系统项目)。在这一框架内,波尔多天文台负责利用全球定位系统进行甚长基线干涉测量分析,以便在观测一级与其他空间大地测量技术的数据结合起来。在本文中,我们提出了(一)与这个新的VLBI软件进行的分析,以及(二)EOP从2005年开始,直到2007年获得的结果。最后,我们比较了EOP解决方案与IVS(国际VLBI服务)分析协调器的组合结果。该协议是在0.2质量的水平,相当于其他IVS分析中心,这表明了全球定位系统软件的VLBI能力。
英文摘要:
A rigorous approach to simultaneously determine a Terrestrial Reference Frame (TRF) and Earth Orientation Parameters (EOP) is now currently applied on a routine basis in a coordinated project within the Groupe de Recherches de Géodésie Spatiale (GRGS) in France. Observations of the various space geodetic techniques (VLBI, SLR, LLR, DORIS and GPS) are separately processed by different analysis centers with the software package GINS-DYNAMO, developed and maintained at the GRGS/CNES (Toulouse). This project is aimed at facilitating fine geophysical analyses of the global Earth system (GGOS project). In this framework, Bordeaux Observatory is in charge of the VLBI (Very Long Baseline Interferometry) analyses with GINS for combination with the data of the other space geodetic techniques at the observation level. In this paper, we present (i) the analyses undertaken with this new VLBI software, and (ii) the results obtained for the EOP from beginning 2005 until 2007. Finally, we compare this EOP solution with the IVS (International VLBI Service) Analysis Coordinator combined results. The agreement is at the 0.2 mas level, comparable to that of the other IVS Analysis Centers, which demonstrates the VLBI capability of the GINS software.
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