Abstract
Disaccordance among the coordinates of the pole which are derived from several kinds of combination of the ILS stations suggests a possibility of secular changes in mean latitudes of the cooperative stations on + 39°8′ irrespective of the effect by the secular drift of the mean pole. Local drifts of — 0″.00156/year for Mizusawa and of + 0″.00105/year for Ukiah were derived from the analyses of the notable increases in the residual latitudes of the five ILS stations during the period 1900–65. Subtraction of the apparent motion of the mean pole due to the local drifts of the stations from the total motion makes the secular motion of the mean pole as 0″.00220/year in the direction 77°7 and this seems to be the real one.
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References
Hattori, T.: 1959, Publ. Int. Latit. Observ. Mizusawa 3, No. 1.
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© 1970 D. Reidel Publishing Company, Dordrecht, Holland
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Yumi, S., Wako, Y. (1970). Secular Motion of the Pole. In: Mansinha, L., Smylie, D.E., Beck, A.E. (eds) Earthquake Displacement Fields and the Rotation of the Earth. Astrophysics and Space Science Library, vol 20. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-3308-4_8
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DOI: https://doi.org/10.1007/978-94-010-3308-4_8
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