Forced nutations of a two-layer Earth model

Details Forced nutations of a two-layer Earth model Forced nutations of a two-layer Earth model

Apr 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001mnras.322..785g&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 322, Issue 4, pp. 785-799.

Astronomy and Astrophysics

Astronomy

12

Celestial Mechanics, Earth

Scientific paper

In this paper we present a theory of the Earth rotation for a model composed of an inelastic mantle and a liquid core, including the dissipation in the core-mantle boundary (CMB). The main features of the theory are: (i) to be Hamiltonian, therefore the computation of some complex inner torques can be avoided; (ii) to be self-consistent and non-dependent on a previous rigid Earth theory, so there is no need to use transfer functions; (iii) to be analytical, the solution being derived by perturbation methods. Numerical nutation series deduced from the theory are compared with the IERS 96 empirical series, an accuracy better than 0.8mas in providing celestial ephemeris pole (CEP) offsets.

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