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Tidal Deformation of the Earth from VLBI Data Analysis

Transactions of IAA RAS, issue 23, 255–259 (2012)

Keywords: VLBI, tidal deformation, Love numbers, asymmetry of tidal displacements

Abstract

Statistically significant corrections to the parameters (the complex Love/Shida numbers) of the lunar-solar tides were obtained from the analysis of VLBI observations carried out from 1985 to 2010 by international geodetic programs on global network. There are the following new nominal (independent of frequency) values of these parameters (in 10-⁴): а) for total tide h(⁰) = (6113 ± 3) - (34 ± 4)i, l(⁰) = (843 ± 1) - (9 ± 1)i; b) for diurnal tides h(⁰) = (6113 ± 3) - (10 ± 6)i, l(⁰) = (843 ± 1) - (8 ± 1)i; c) for semi-diurnal tidesh(⁰) = (6106 ± 3) - (24 ± 3)i, l(⁰) = (843 ± 1) + (3 ± 1)i. The frequency dependent effects of resonances in the diurnal tides could not be evaluated because of the existence of close frequencies in their harmonic expansion. Insufficient accuracy of the observations could not be corrected of the transfer function even for the main part of these resonances excited by the retrograde free core nutation. In the future, it is proposed to involve positional data GPS-measurements for this purpose. However, 50 VLBI stations have discovered a new effect of the asymmetry of the horizontal tidal displacement in the direction of tectonic movements of these stations.

Citation

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V. S. Gubanov, S. L. Kurdubov. Tidal Deformation of the Earth from VLBI Data Analysis // Transactions of IAA RAS. — 2012. — Issue 23. — P. 255–259.

@article{gubanov2012,
  abstract = {Statistically significant corrections to the parameters (the complex Love/Shida numbers) of the lunar-solar tides were obtained from the analysis of VLBI observations carried out from 1985 to 2010 by international geodetic programs on global network. There are the following new nominal (independent of frequency) values of these parameters (in 10-⁴): а) for total tide h(⁰) = (6113 ± 3) - (34 ± 4)i, l(⁰) = (843 ± 1) - (9 ± 1)i; b) for diurnal tides h(⁰) = (6113 ± 3) - (10 ± 6)i, l(⁰) = (843 ± 1) - (8 ± 1)i; c) for semi-diurnal tidesh(⁰) = (6106 ± 3) - (24 ± 3)i, l(⁰) = (843 ± 1) + (3 ± 1)i. The frequency dependent effects of resonances in the diurnal tides could not be evaluated because of the existence of close frequencies in their harmonic expansion. Insufficient accuracy of the observations could not be corrected of the transfer function even for the main part of these resonances excited by the retrograde free core nutation. In the future, it is proposed to involve positional data GPS-measurements for this purpose. However, 50 VLBI stations have discovered a new effect of the asymmetry of the horizontal tidal displacement in the direction of tectonic movements of these stations.},
  author = {V.~S. Gubanov and S.~L. Kurdubov},
  issue = {23},
  journal = {Transactions of IAA RAS},
  keyword = {VLBI, tidal deformation, Love numbers, asymmetry of tidal displacements},
  pages = {255--259},
  title = {Tidal Deformation of the Earth from VLBI Data Analysis},
  url = {http://iaaras.ru/en/library/paper/783/},
  year = {2012}
}

TY  - JOUR
TI  - Tidal Deformation of the Earth from VLBI Data Analysis
AU  - Gubanov, V. S.
AU  - Kurdubov, S. L.
PY  - 2012
T2  - Transactions of IAA RAS
IS  - 23
SP  - 255
AB  - Statistically significant corrections to the parameters (the complex
Love/Shida numbers) of the lunar-solar tides were obtained from the
analysis of VLBI observations carried out from 1985 to 2010 by
international geodetic programs on global network. There are the
following new nominal (independent of frequency) values of these
parameters (in 10-⁴): а) for total tide h(⁰) = (6113 ± 3) - (34 ±
4)i, l(⁰) = (843 ± 1) - (9 ± 1)i; b) for diurnal tides h(⁰) = (6113 ±
3) - (10 ± 6)i, l(⁰) = (843 ± 1) - (8 ± 1)i; c) for semi-diurnal
tidesh(⁰) = (6106 ± 3) - (24 ± 3)i, l(⁰) = (843 ± 1) + (3 ± 1)i. The
frequency dependent effects of resonances in the diurnal tides could
not be evaluated because of the existence of close frequencies in
their harmonic expansion. Insufficient accuracy of the observations
could not be corrected of the transfer function even for the main
part of these resonances excited by the retrograde free core
nutation. In the future, it is proposed to involve positional data
GPS-measurements for this purpose. However, 50 VLBI stations have
discovered a new effect of the asymmetry of the horizontal tidal
displacement in the direction of tectonic movements of these
stations.
UR  - http://iaaras.ru/en/library/paper/783/
ER  -