GRGS combination of the terrestrial frame and Earth orientation parameters at the observation level. Contribution to ITRF2008 realization

Details GRGS combination of the terrestrial frame and Earth orientation parameters at the observation level. Contribution to ITRF2008 realization GRGS combination of the terrestrial frame and Earth orientation parameters at the observation level. Contribution to ITRF2008 realization

Nov 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009sf2a.conf..115r&link_type=abstract

SF2A-2009: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics, held 29 June - 4 July 2009 in

Astronomy and Astrophysics

Astrophysics

Scientific paper

A new version of ITRF (ITRF2008) is planned and requests combination of the various astro-geodetic techniques over a period of several years. In the framework of the " Groupe de Recherches de Géodésie Spatiale ", GRGS, we are combining normal equations derived from the processing of four techniques on a regular weekly basis (GPS, VLBI, SLR and DORIS). Observations of these techniques are separately processed at different analysis centers of GRGS using the software package GINS-DYNAMO, developed and maintained by GRGS. The strength of the method is the use of a set of identical up-to-date models and standards in unique software. The datum-free normal equation matrices weekly derived from the analysis of each technique are stacked to derive solutions of Station Space Coordinates, and Earth Orientation Parameters (EOP). In this presentation, we explain the process to obtain weekly combined normal equations and validate the EOP global solutions with respect to C04 series and the SSC with respect to the ITRF2005.

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