Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001cemda..80..177b&link_type=abstract
Celestial Mechanics and Dynamical Astronomy, v. 80, Issue 3/4, p. 177-184 (2001).
Astronomy and Astrophysics
Astronomy
2
Earth Rotation, Precession-Nutation
Scientific paper
The accuracy of the rigid Earth solution SMART97 is 2μ as over the time interval (1968, 2023), accuracy showed by the comparison with a numerical integration using the positions of the Moon, the Sun, and the planets given by DE403. To obtain a nonrigid Earth solution, we use the transfer function of Mathews et al. (2000) and, to keep the precision of our rigid Earth solution in the computation of the geophysical effects, we apply this transfer function to the Earth's angular velocity vector in order to avoid the inherent approximations of the classical methods. Moreover the perturbations of the third component of the angular velocity vector are taken into account. Lastly, we take into account, in an iterative process, the second order perturbations due to the geophysical effects. The results are compared with the Herring solution (1996) published in the IERS Conventions.
Bretagnon Pierre
Rocher Patrick
Simon Laura J.
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