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Spectrum of Latitude Variations in the Frequency Range 1.4-2.2 cpy and a Search for Nearly Diurnal Free Polar Motion

Published online by Cambridge University Press:  14 August 2015

A. I. Emetz
A. I. Emetz*
Affiliation:
Main Astronomical Observatory of the Ukrainian Academy of Sciences, Kiev, USSR

Extract

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Astronomical latitude observations of the ILS stations seem to indicate the existence of both a retrograde and a direct component of nearly diurnal polar motion with close frequencies (Yatskiv et al. 1975). The latter would manifest itself as a latitude variation with a period of about 204 mean days (m.d.) and with a phase depending on the double longitude of station.

Type
Session II
Information
Symposium - International Astronomical Union , Volume 78: Nutation and the Earth's Rotation , 1980 , pp. 75 - 79
Copyright
Copyright © Reidel 1980 

References

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Ulrych, T.J., Smylie, D.E., Jensen, O.G., and Clarke, G.K.: 1973, Study of the nearly diurnal free nutation based on latitude observations of the ILS stations (I). Publ. Int. Lat. Obs. Mizusawa, 10, 1, 1–31.Google Scholar
Yatskiv, Ya. S., Korsun’, A. A., and Rykhlova, L. V.: 1973, Spectrum of the coordinates of the Earth's pole during the period 1846-1971, Sov. Astron.-AJ 16, 1041–1045; translation of Astron. Zh. 49, 1311-1318 (1972).Google Scholar
Yatskiv, Ya. S., Wako, Ya., and Kaneoko, Yo.: 1975, Study of the nearly diurnal free nutation based on latitude observations of the ILS stations (I), Publ. Intern. Lat. Obs., Mizusawa 10, 1, 1.Google Scholar