HR: 1340h
AN: G43C-1470 [Abstracts]
TI: Towards an operational IDS combination
AU: Valette, J
EM: Jean-Jacques.Valette@cls.fr
AF: CLS, 8-10 Rue Hermes, Ramonville, 31520, France
AU: Soudarin, L
EM: laurent.soudarin@cls.fr
AF: CLS, 8-10 Rue Hermes, Ramonville, 31520, France
AU: Willis, P
EM: willis@ipgp.jussieu.fr
AF: Institut Geographique National, Direction Technique, 2 avenue Pasteur, Saint-Mande,
94160, France
AU: Willis, P
EM: willis@ipgp.jussieu.fr
AF: Institut de Physique du Globe de Paris, Geophysique Spatiale et
Planetaire, 4, place Jussieu, Paris, 75252, France
AU: Govind, R
EM: Ramesh Govind
AU: Stepanek, P
EM: pste@centrum.cz
AF: Geodesy Observatory Pecny, 244, Ondrejov, 25165, Czech Republic
AU: * Lemoine, F
EM: Frank.Lemoine@gsfc.nasa.gov
AF: NASA Goddard Space Flight Center, Greenbelt, Greenbelt, MAR 20771, United States
AU: Altamimi, Z
EM: Zuheir.Altamimi@ensg.ign.fr
AF: LAREG/IGN, 6-8 Avenue Blaise Pascal, Champs-sur-Marne, 77455, France
AU: Le Bail, K
EM: karinelebail@gmail.com
AF: LAREG/IGN, 6-8 Avenue Blaise Pascal, Champs-sur-Marne, 77455, France
AB:
The International DORIS Service is in operation since 2003. Over the last four years, five instruments on the SPOT
2-4-5, ENVISAT and the JASON-1 satellites have provided DORIS Doppler data collected from a global network
of about 50 stations. The number of Analysis Centers (AC) who have processed the data and have high level
experience has progressively risen. Among them, two ACs : IGN/JPL using GYPSY/OASIS software and
LEGOS/CLS using GINS/DYNAMO software now provide solutions of station coordinates and EOPs on a routine
basis to the IGN and NASA CDDIS data centers. INASAN also processes DORIS data using GYPSY/OASIS
software and submitted SINEX files to the ITRF2005 solution. The two newest DORIS analysis centers, include
Geoscience Australia (GA) using the NASA GEODYN software and the Geodetic Observatory Pecny (GOP) using
the BERNESE software. The GOP has adapted software not originally designed to process DORIS data. The
performance reached by the new analysis centers in orbit and station positions determination is very
encouraging. The availability of geodetic solutions from different algorithms and software packages allows us to
efficiently contribute to cross-comparison of the solutions and to the improvement of the DORIS technique.
The operational combinations of SINEX solutions contributed by the DORIS analysis centers will have to perform
at least two functions. The first one is an internal validation of each individual AC time series. The second is a
combination of all the AC weekly solutions in order to generate IDS combined products for station coordinates
and EOPs. The paper presents the status of each AC processing (strategy, results, organization and future plan)
and the combinations of solutions for the period of several years (2002-2006 as an objective). The combinations
are realized with the IGN/LAREG CATREF software. Essential to the analysts, the station network event file
(discontinuities, poor data span…) will be updated and listed. The complementary analysis of ITRF2005 for the
new stations and a cumulative intra-technique solution will also be addressed. Finally, the future weekly CATREF
combinations and processing standards will be specified and presented in the paper. The outputs such as
transformation parameters and residuals, per station time series, to be available online at http://ids.cls.fr/ will
also be discussed.
DE: 0520 Data analysis: algorithms and implementation
SC: Geodesy [G]
MN: 2007 Fall Meeting