Toward the construction of a new precession-nutation theory of nonrigid Earth
Authors: Bretagnon, P.; Rocher, P.; Simon J.-L.
Source: Celestial Mechanics and Dynamical Astronomy, Volume 80, Numbers 3-4, July 2001 , pp. 177-184(8)
Abstract:The accuracy of the rigid Earth solution SMART97 is 2 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.
Document Type: Regular Paper
Affiliations: Institut de mécanique céleste, Observatoire de Paris, 77 avenue, Denfert-Rochereau 75014, Paris, France
Publication date: July 2001