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Zonal Love and Shida numbers estimated by VLBI

Hana Krasna ; Johannes Böhm ; Rüdiger Haas (Institutionen för rymd- och geovetenskap, Rymdgeodesi och geodynamik) ; Harald Schuh
Reports of the Finnish Geodetic Institute - Proceedings of the 21st Meeting of the European VLBI Group for Geodesy and Astronomy, Ed. by N. Zubko and M. Poutanen (0355-1962). Vol. 2013 (2013), 1, p. 121-125.
[Konferensbidrag, övrigt]

The deformation of the anelastic Earth as a response to external forces from the Moon and Sun is characterized with proportionality parameters, the so- called Love and Shida numbers. The increasing pre- cision and quality of the VLBI (Very Long Baseline Interferometry) measurements allow determining those parameters. In particular, the long history of the VLBI data enables the estimation of Love and Shida numbers at the low frequencies with the longest period of a tidal wave at 18.6 years. In this study we analyze 27 years of VLBI measurements (1984.0 - 2011.0) following the recent IERS Conventions 2010. In several global solu- tions, we estimate the complex Love and Shida num- bers of the solid Earth tides for the main long-period tidal waves. Furthermore, we determine the Love and Shida numbers of the rotational deformation due to po- lar motion, the so-called pole tide.

Nyckelord: Love and Shida numbers, solid Earth tides, pole tide



Denna post skapades 2013-10-22. Senast ändrad 2016-05-24.
CPL Pubid: 185530

 

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