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Nutation and Nearly Diurnal Latitude Variations from the Data of Bright Zenith Star Observations in Poltava from 1950 to 1977

Published online by Cambridge University Press:  14 August 2015

N. A. Popov  and
Ya. S. Yatskiv
N. A. Popov
Affiliation:
Poltava Gravimetrical Observatory, Ukrainian Academy of Sciences, Kiev, USSR
Ya. S. Yatskiv
Affiliation:
Main Astronomical Observatory, Ukrainian Academy of Sciences, Kiev, USSR

Extract

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The observations of bright zenith stars (α Persei and η Ursae Maj) have been carried out in Poltava since 1939. These observations have been used for determining the corrections to semiannual and fortnightly nutation terms and for studying the nearly diurnal free polar motion (Popov, 1968; Popov and Yatskiv, 1977). Recently the reduction of the new series of bright zenith star observations has been finished in Poltava (see Table 1). Therefore it was interesting to carry out a new analysis of these observations for the purpose of studying the nutation and of searching for the nearly diurnal free polar motion.

Type
Session II
Information
Symposium - International Astronomical Union , Volume 78: Nutation and the Earth's Rotation , 1980 , pp. 67 - 74
Copyright
Copyright © Reidel 1980 

References

Burg, J. P.: 1970, New concepts in power spectra estimation. Paper presented at 40th Annual Int. Soc. Explor. Geophys. Meeting, New Orleans, Louisiana, USA.Google Scholar
Popov, N.A.: 1968, Small periodical terms in latitude variations of Poltava, Naukova Dumka, Kiev.Google Scholar
Popov, N.A. and Yatskiv, Ya. S.: 1977, On the interpretation of the spectrum of latitude differences derived from observations of bright zenith star in Poltava, Astron. J. 54, 2, Nauka.Google Scholar
Smylie, D. E., Clarke, G. K. C. and Ulrych, T. J.: 1973, Analysis of irregularities in the Earth's rotation, in Methods in Computational Physics, 13, New York, 391.Google Scholar
Taradij, V. K.: 1968, Nutation with the period 18.6 years from the data of the International Latitude Service, in Voprosy Astrometriji, 2, Naukova Dumka, Kiev, 1.Google Scholar
Yatskiv, Ya. S., Wako, Ya. and Kaneko, 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
Yokoyama, K.: 1973, Study on some nutation terms by the ILS z-term, Publ. Intern. Lat. Obs. Mizusawa, 9, 1, 1.Google Scholar