Two-epoch series of precession quantities in IAU 2000 and post IAU 2000 precession-nutation models

Details Two-epoch series of precession quantities in IAU 2000 and post IAU 2000 precession-nutation models Two-epoch series of precession quantities in IAU 2000 and post IAU 2000 precession-nutation models

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005acasn..46...27r&link_type=abstract

Acta Astronomica Sinica, vol. 46, no. 1, p. 27-36

Statistics

Applications

Sun: Coronal Mass Ejection, Magnetic Fields, Sun: Activity, Solar Wind, Interplanetary Medium

Scientific paper

According to the resolutions of the IAU 24th General Assembly, the IAU 2000 precession-nutation model should be employed from the Jan. 1st, 2003. The expressions for seven precession quantities with one time epoch of that model in common use could be found in the IERS Conventions (2003). In 2003, Capitaine et al. approved the model mentioned above, and the new model was referred to as post IAU 2000 precession-nutation model. Based on their work, we have achieved to obtain the expressions for the related precessions with two epochs of those models, respectively. Applied to coordinate transformations the two kinds of our expressions have almost the same precisions as their counterparts of the originated ones, and within the period from 1800 to 2200 the precisions could reach about 1 mas and 1 μas, respectively. All our expressions for precession quantities have the same form as that in the IAU 1976 precession model except the order of series, therefore, it is convenient for their applications in astronomical practice. The results in this article have been adopted in calculations for the Chinese Astronomical Ephemeris (2005).

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