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On the Short Period Terms in the UT1 and Those in the Polar Motion

Published online by Cambridge University Press:  27 June 2016

Shigetaka Iijima  and
Sêichi Okazaki
Shigetaka Iijima
Affiliation:
Tokyo Astronomical Observatory, Japan
Sêichi Okazaki
Affiliation:
Tokyo Astronomical Observatory, Japan

Abstract

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Short period terms ranging from 0.3 to 6.0 yr. are resolved from 13.5 yr data of UT1 and polar motion on periodograms, considering the mutual interference effects caused by truncation of data. Beside principal terms known well, 26 month term is reconfirmed but any Chandlerian term is not found in UT1. Minor amplitude terms are found around 0.48, 0.86, 1.36, 1.58, 3, and 4 yr in UT1, and 1.12, 1.26, and 1.43 yr in polar motion.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 48: Rotation of the Earth , 1972 , pp. 58 - 60
Copyright
Copyright © Reidel 1972 

References

Iijima, S. and Okazaki, S.: 1966, J. Geod. Soc. Japan 12, No. 2.Google Scholar
Vicente, R. O. and Yumi, S.: 1969, Publ. Int. Lat. Obs. Mizusawa VII, No. 1.Google Scholar