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Observations of Luni-Solar and Free Core Nutation

Published online by Cambridge University Press:  12 April 2016

Dennis D. McCarthy  and
Brian J. Luzum
Dennis D. McCarthy
Affiliation:
U. S. Naval Observatory Washington, DC 20392USA
Brian J. Luzum
Affiliation:
U. S. Naval Observatory Washington, DC 20392USA

Abstract

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An analysis of the differences between observed nutation angles and the 1980 IAU Nutation Theory shows the existence of currently unmodeled effects. An empirical set of corrections to the 1980 IAU Nutation Theory is presented and compared with current geophysical models. A prograde periodic variation (period ≈ 420 days), which may be related to the theoretical free core nutation, is apparently seen.

Type
Part 2. Poster Papers
Information
International Astronomical Union Colloquium , Volume 127: Reference Systems , 1991 , pp. 303 - 308
Copyright
Copyright © United States Naval Observatory 1991

References

Dehant, V.: 1990, Geophys. J. Int. 100, 477.CrossRefGoogle Scholar
Herring, T.: 1987, in BIH Annual Report for 1987, pp. D–106-D108.Google Scholar
Herring, T.: 1990, to be published.Google Scholar
Herring, T.A., Gwinn, C.R., and Shapiro, I.I.: 1986, J. Geophys. Res. 91, 4745.CrossRefGoogle Scholar
Kinoshita, H.: 1977, Celest. Mech. 15, 277.Google Scholar
Kinoshita, H. and Souchay, J.: 1990, Submitted to Celest. Mech. Google Scholar
McCarthy, D.D.: 1989, IERS Tech. Note 3, 14.Google Scholar
Mathews, P.M., Buffett, B.A., Herring, T.A., and Shapiro, I.I.: 1989, Submitted to J. Geophys. Res. Google Scholar
Molodenskiy, S.M. and Kramer, M.V.: 1987, Izvest., Earth Phys. 23, 89 NEOS Annual Report for 1987 Google Scholar
Sasao, T. and Wahr, J.M.: 1981, Geophys. J. R. Astron. Soc. 64, 729.CrossRefGoogle Scholar
Seidelmann, P.K.: 1982, Celest. Mech. 27, 79.Google Scholar
Wahr, J.M.: 1981, Geophys. J. R. Astron. Soc. 64, 705.Google Scholar
Williams, J.G., Newhall, X.X., and Dickey, J.O.: 1990, Submitted to Astron. and Astrophys. Let. Google Scholar
Woolard, E.W.: 1953, Astron. Pap. Amer. Eph. and Naut. Almanac 15, part 1.Google Scholar
Zhu, S.Y., and Groten, E.: 1989, Astron. J. 98, 1104.CrossRefGoogle Scholar
Zhu, S.Y., Groten, E., and Reigber, C.: 1990, Astron. J. 99, 1024.Google Scholar