Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008jsrs.meet...61c&link_type=abstract
"Proceedings of the "Journées Systèmes de Référence Spatio-temporels 2007". Observatoire de Paris, 17-19 September 2007. Editor:
Astronomy and Astrophysics
Astronomy
Scientific paper
The IAU 2006 resolutions B1, B2 and B3, adopted by the XXVIth IAU General Assem- bly (August 2006) and endorsed by the XXIVth IUGG General Assembly (July 2007), supplement the IAU 2000 Resolutions on reference systems. The aim of IAU 2006 Resolution B1 is to adopt a precession model as a replacement to the IAU 2000 precession in order to be consistent both with both dynamical theory and the IAU 2000 nutation. The aim of IAU 2006 Resolutions B2 and B3 is to address definition, terminology or orientation issues relative to reference systems and time scales that needed to be specified after the adoption of the IAU 2000 resolutions. This paper explains the changes resulting from the joint IAU 2000 and 2006 resolutions with respect to the previous position and reviews the progress in the concepts, nomenclature, models and conventions for fundamental astronomy. The paper also reports on practical aspects related to the Earth orientation parameters and describes the characteristics of the IAU high precision model for the celestial motion of the Earths pole.
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