Other
Scientific paper
Aug 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992asdy.conf.2271w&link_type=abstract
IN: Astrodynamics 1991; Proceedings of the AAS/AIAA Astrodynamics Conference, Durango, CO, Aug. 19-22, 1991. Pt. 3 (A92-43251 18
Other
Earth Rotation, Geopotential Height, Long Term Effects, Mathematical Models, Solar Terrestrial Interactions, Earth Motion, Earth Orientation, Equations Of Motion, Precession, Tidal Waves, Translational Motion
Scientific paper
A numerical theory for the long-term rotational motion of the quasi-rigid earth has been constructed. The theory spans 72,000 years centered about 1968 A.D. The earth model used is termed self-consistent because expressions for the forces and torques acting upon the earth are truncated based upon their magnitudes regardless of their cause. The earth model used includes geopotential terms up to n = 3 and tidal terms to n = 2. Quasi-rigidity implies that the level of truncation is chosen such that tidal torques and forces are included in the model, but tidal effects on the mass properties of the earth are not. Both lunisolar and planetary effects on the rotation are considered. The data generated by the numerical integration has been fitted using Chebyshev polynomial series in order to make the solution more compact and usable. The solution for obliquity, precession, and other parameters which affect the earth's climate are presented graphically.
Richardson David L.
Walker C. F.
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