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Report of the IAU Working Group on the Theory of Nutation

Published online by Cambridge University Press:  12 April 2016

Dennis D. McCarthy
Dennis D. McCarthy*
Affiliation:
U. S. Naval Observatory Washington, DC 20392USA

Abstract

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Modern observations of celestial pole offsets indicate that small but significant corrections to the current IAU theories of nutation and precession can be detected. These corrections are of the order of a few milliseconds of arc. To meet the needs of those who require millisecond of arc accuracy in reference frame applications, the International Earth Rotation Service (IERS) publishes in weekly and monthly bulletins the most recent observations, along with predictions of these corrections. These appear to meet the needs of users. In view of the fact that the geophysical community has not adopted a model which describes the nutation and precession theory and that the current procedure of the IERS meets the need of high-accuracy users, there does not appear to be a need to identify a new IAU nutation theory at this time.

Type
Part 1. Oral Papers
Information
International Astronomical Union Colloquium , Volume 127: Reference Systems , 1991 , pp. 153 - 156
Copyright
Copyright © United States Naval Observatory 1991

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