Estimation of CRF and TRF from VLBI observations by the Least Square Collocation method

Details Estimation of CRF and TRF from VLBI observations by the Least Square Collocation method Estimation of CRF and TRF from VLBI observations by the Least Square Collocation method

Aug 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006iaujd..16e..45k&link_type=abstract

Nomenclature, Precession and New Models in Fundamental Astronomy, 26th meeting of the IAU, Joint Discussion 16, 22-23 August 200

Astronomy and Astrophysics

Astronomy

Scientific paper

The aim of this work is to obtain the Terrestrial Reference Frame (TRF), Celestial Reference Frame (CRF) and Earth Orientation Parameters (EOP) series from processing Very Long Baseline Interferometry (VLBI) data by the Least Square Collocation (LSC) method. The observations from 1979 to 2006 were processed with the QUASAR software. More than 4.5 millions delays were used. Coordinates and velocities of 126 VLBI stations and coordinates of 707 radio-sources were estimated. The 12 stations which have more than 200000 observations were used for no-net-translation/no-net-rotation tie to the VTRF2003 catalogue. The 212 defining radio-sources of ICRF-ext.2 were used for no-net-rotation tie to the CRF. The wet component of tropospheric delay and station clock offsets were estimated as sum of polynomial trend and stochastic signal with a-priori defined covariance function. The catalogues with and without stations antenna axis offset estimation were obtained and compared. The obtained solution were compared with other TRF/CRF VLBI solutions and there are showed that the QUASAR LSC solution have the same precision than others.

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