38 citations · 73 across the 7 of their papers we have counts for
7 papers · 1 filter
Astrometric suitability of optically-bright ICRF sources for the alignment with the future Gaia celestial reference frame
G. Bourda, P. Charlot, J. -F. Le Campion
The ICRF, currently based on the position of 717 extragalactic radio sources observed by VLBI, is the fundamental celestial reference frame adopted by the IAU in 1997. Within the n…
Multi-step VLBI observations of weak extragalactic radio sources to align the ICRF and the future GAIA frame
G. Bourda, P. Charlot, R. Porcas +1
The space astrometry mission GAIA will construct a dense optical QSO-based celestial reference frame. For consistency between optical and radio positions, it will be important to a…
VLBI analyses with the GINS software for multi-technique combination at the observation level
G. Bourda, P. Charlot, R. Biancale
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 coordina…
GINS: a new tool for VLBI Geodesy and Astrometry
G. Bourda, P. Charlot, R. Biancale
In the framework of the "Groupe de Recherches de Géodésie Spatiale" (GRGS), a rigorous combination of the data from five space geodetic techniques (VLBI, GPS, SLR, LLR and DORIS) i…
Analysis and comparison of precise long-term nutation series, strictly determined with OCCAM 6.1 VLBI software
G. Bourda, J. Boehm, R. Heinkelmann +1
The IAU/IUGG Working Group on "Nutation for a non-rigid Earth", led by Véronique Dehant, won the European Descartes Prize in 2003, for its work developing a new model for the prece…
A Vlbi Survey of Weak Extragalactic Radio Sources for the Alignment of the Icrf and the Future Gaia Frame
G. Bourda, P. Charlot, R. Porcas +1
The space astrometry mission GAIA will construct a dense optical QSO-based celestial reference frame. For consistency between the optical and radio positions, it will be important…