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Forced Nutation and Irregularity of the Rotation of the Earth

Published online by Cambridge University Press:  14 August 2015

G. P. Pilnik
G. P. Pilnik*
Affiliation:
Sternberg Astronomical Institute, Moscow, U.S.S.R.

Extract

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It is possible, in principle, to derive from astronomical observations both the tidal and nutational variations in the rotation of the Earth. However, in practice there are a number of difficulties. To detect the waves with periods of 18.6, 1.0 and 0.5 year one could use UT1-TAI. Unfortunately, this is impossible because of the lack of sufficiently long series of observations and because of significant non-periodic irregularities in the rate of the Earth's rotation. In addition, the annual wave consists of several harmonics of different natures which cannot be separated from one another. Investigation of short-period nutations is more promising, but it is also connected with specific difficulties.

Type
Session V
Information
Symposium - International Astronomical Union , Volume 78: Nutation and the Earth's Rotation , 1980 , pp. 235 - 237
Copyright
Copyright © Reidel 1980 

References

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