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Artificial Satellites

The Journal of Space Research Centre of Polish Academy of Sciences

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Volume 42, Issue 1


Spectral Characteristic of Polar Motion in the 2005-2006 and 1999-2000 Winters Seasons

J. Nastula / B. Kolaczek
Published Online: 2007-12-10 | DOI: https://doi.org/10.2478/v10018-007-0013-5

Spectral Characteristic of Polar Motion in the 2005-2006 and 1999-2000 Winters Seasons

The Earth's pole moves on the Earth's surface along the spiral curve known as "polhody". Polhody computed from the IERS C04 pole coordinates were compared with those computed after removing successively oscillations with periods shorter than 150, 30, 10, 2 days. The comparison of these polhody show that the loops in the winter seasons of 2005-2006 and 1999-2000 are caused by the oscillations of polar motion with periods shorter than 30 days. These short periodical oscillations of geodetic excitation function of polar motion were correlated with those of the atmospheric and oceanic excitation functions. There are high correlations with coefficients equal to 0.8-0.9 during epochs when loops occur.

Keywords: Polar motion loops; short periodic oscillations of polar motin and geophysical excitation

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About the article

Published Online: 2007-12-10

Published in Print: 2007-12-01

Citation Information: Artificial Satellites, Volume 42, Issue 1, Pages 1–7, ISSN (Online) 2083-6104, ISSN (Print) 0208-841X, DOI: https://doi.org/10.2478/v10018-007-0013-5.

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