HR: 1340h
AN: G43C-1469    [Abstracts]
TI: Latest evolutions of DORIS data processing at the LEGOS/CLS Analysis Center.
AU: * Soudarin, L
EM: laurent.soudarin@cls.fr
AF: CLS, 8-10 rue Hermes Parc technologique du Canal, Ramonville, 31520, France
AU: Capdeville, H
EM: hugues.capdeville@cls.fr
AF: CLS, 8-10 rue Hermes Parc technologique du Canal, Ramonville, 31520, France
AU: Biancale, R
EM: richard.biancale@cnes.fr
AF: CNES/GRGS, 14 avenue Edouard Belin, Toulouse, 31400, France
AU: Crétaux, J
EM: cretaux@cnes.fr
AF: CNES/LEGOS, 14 avenue Edouard Belin, Toulouse, 31400, France
AU: Lemoine, J
EM: jean-michel.lemoine@cnes.fr
AF: CNES/GRGS, 14 avenue Edouard Belin, Toulouse, 31400, France
AB: LEGOS/GRGS and CLS teams have been involved in DORIS data processing since the launch of Spot-2 in 1990. They jointly participate in the International DORIS Service (IDS) as Analysis Center. They also contribute to the GRGS Combination Research Center (CRC), which uses the GINS/DYNAMO software package in order to process observations of the astro-geodetic techniques DORIS, GPS, SLR and VLBI, and to perform the global combination of the geodetic parameters. The goal of this paper is to present the recent evolutions brought to DORIS processing. 1: a new set of models was taken into account in the orbit computation: the GRACE-derived gravity model EIGEN- GL04S which includes annual and semi-annual terms of the low coefficients; the latest ITRF2005; a priori tropospheric zenith delays, derived from ECMWF meteorological model. 2: the data processing is now fitted for a weekly delivery of the products requested by IDS and CRC. Improvements brought to the estimations of the coordinates times series, EOP, scale factor, geocenter will be discussed. In particular, the new configuration eliminates the systematic bias of the scale factor which appeared in our previous coordinates solutions.
DE: 1229 Reference systems
DE: 1240 Satellite geodesy: results (6929, 7215, 7230, 7240)
DE: 1241 Satellite geodesy: technical issues (6994, 7969)
SC: Geodesy [G]
MN: 2007 Fall Meeting