Theory of Nutation of a Nonrigid Earth

Details Theory of Nutation of a Nonrigid Earth Theory of Nutation of a Nonrigid Earth

Nov 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001arep...45..908z&link_type=abstract

Astronomy Reports, Volume 45, Issue 11, November 2001, pp.908-921

Astronomy and Astrophysics

Astronomy

Scientific paper

A general theory of terrestrial nutation is proposed assuming that the Earth is made up of four envelopes (atmosphere, mantle, fluid core, and solid core) and taking account of all important forces (viscous, electromagnetic, etc.). A theory for the effect produced on the Earth's nutation by viscous forces in the fluid core is developed based on experimental data on the viscosity of molten iron under pressure. The proposed theory predicts nutation in longitude and inclination with an rms deviation of 0.35 milliarcseconds.

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