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Improved Analytic Nutation Model

Published online by Cambridge University Press:  03 August 2017

C. F. Yoder  and
E. R. Ivins
C. F. Yoder
Affiliation:
Jet Propulsion Laboratory, Calfironia Institute of Technology, 4800 Oak Grove Drive, Pasadena, California 91109
E. R. Ivins
Affiliation:
Jet Propulsion Laboratory, Calfironia Institute of Technology, 4800 Oak Grove Drive, Pasadena, California 91109

Extract

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Models describing earth's nutations can be separated into two major components, plus several small perturbations, of which ocean tides and solid friction are the most significant. The primary element of a successful model is an accurate rigid earth nutation theory. The effect of mantle elasticity and differential nutation of the fluid core is then obtained as a correction factor which multiplies the rigid body result. Wahr's (1981) theory is certainly the most sophisticated elastodynamic response model. However, we have found that the simple model of Sasao et al., (1980) differs from Wahr's theory term by term by less than 0.3mas if a modern earth structure model (1066B) is used to evaluate the nutation structure constants.

Type
Geophysics
Information
Symposium - International Astronomical Union , Volume 129: The Impact of VLBI on Astrophysics and Geophysics , 1988 , pp. 379 - 380
Copyright
Copyright © Reidel 1988 

References

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