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1 LAB - Laboratoire d-Astrophysique de Bordeaux Pessac 2 OASU - Observatoire aquitain des sciences de l-univers 3 L3AB - Laboratoire d-astrodynamique, d-astrophysique et d-aéronomie de bordeaux 4 Université Sciences et Technologies - Bordeaux 1 5 DTP - Dynamique terrestre et planétaire

Abstract : 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.

Autor: G. Bourda - P. Charlot - R. Biancale -

Fuente: https://hal.archives-ouvertes.fr/


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