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Chandler effect and nearly diurnal free wobble as determined from observations with a superconducting gravimeter

Published online by Cambridge University Press:  03 August 2017

Bernd Richter  and
Walter Zürn
Bernd Richter
Affiliation:
Institut für Angewandte Geodäsie, Richard-Strauss-Allee 11 D-6000 Frankfurt 70, FRG
Walter Zürn
Affiliation:
Geowissenschaftliches Observatorium Schiltach, Heubach 206 D-7620 Wolfach, FRG

Abstract

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A continuous three year series of observations with the model TT40 superconducting gravimeter has been analysed for all frequency domains. The frequency of the nearly diurnal free wobble (NDFW) (1 + 1/(431.2 ± 3.2) cycles/sid.d.) and a damping factor (6208.5 days) are derived from this dataset. These results are not in agreement with the values predicted by the theoretical model presented by Wahr but match very closely the values derived from VLBI observations. A similar study of long period effects suggests furthermore that there is a strog correlation with the polar motion observed by other techniques. By comparing different drift models with respect to the ultra-long period of the gravity variations it is shown that the observed Chandler effect is not principally subjected to this type of instrumentally dependent parameter.

Type
V. Precession & Nutation
Information
Symposium - International Astronomical Union , Volume 128: Earth's Rotation and Reference Frames for Geodesy and Geodynamics , 1988 , pp. 309 - 315
Copyright
Copyright © Reidel 1988 

References

Dehant, V., 1986: ‘Nutations and Inelasticity of the Earth.’ submitted to Physics of the Earth and Planetary Interiors Google Scholar
Goodkind, J., 1983: ‘Q of the nearly diurnal free wobble.’ Proc. 9th Int. Symp. Earth Tides (ed. Kuo, J.), Schweizerbart, Stuttgart, 569–575 Google Scholar
Gwinn, C. R.; Herring, T. A.; Shapiro, I. I., 1986: ‘Geodesy by Radio Interferometry: Studies of the forced nutation of the earth. 2. Interpretation.’ J. Geophys. Res. 91, 4755–4765 Google Scholar
Heitz, S., 1980/83: ‘Grundlagen kinematischer und dynamischer Modelle der Geodäsie, Geophysik und Astronomie, Band 1 und 2.’ Ferd. Dümmler's Verlag, Bonn Google Scholar
Hinderer, J.; Legros, H.; Amalvict, M.; Lecolazet, R., 1986: ‘Theoretical and Observational Search for thr Gravimetric Factor: Diurnal Resonance and Long-period Pertubations.’ Proc. 10th Int. Symp. Earth Tides (ed. Vieira, ), Madrid, in press Google Scholar
Lambeck, K., 1973: ‘Temporal variations of rotational origin in the absolute value of gravity.’ Studia geophys. et geod. 17, 269–271 Google Scholar
Lecolazet, R., 1983: ‘Correlation between diurnal gravity tides and the earth's rotation rate.’ Proc. 9th Int. Symp. Earth Tides (ed. Kuo, ), Schweizerbart, Stuttgart, 527–530 Google Scholar
Leoine, J., 1978: ‘Strain-Tide Spectroscopy.’ Geophys. J. R. astro. Soc. 54, 27–41 Google Scholar
Melchior, P., 1983: ‘The Tides of the Planet Earth, 2nd edition.’ Pergamon Press, Oxford Google Scholar
Neuberg, J.; Hinderer, J.; Zürn, W., 1987: ‘Stacking gravity tide observations in Central Europe for the retrieval of the complex eigenfrequency of the nearly diurnal free wobble.’ submitted to Geophys. J. R. astr. Soc. Google Scholar
Neuberg, J.; Zürn, W., 1986: ‘Investigation of the nearly diurnal resonance using gravity, tilt and strain data simultaneously.’ Proc. 10th Int. Symp. Earth Tides (ed. Vieira, ), Madrid, in press Google Scholar
Richter, B., 1986: ‘The spectrum of a registration with a superconducting gravimeter.’ Proc. 10th Int. Symp. Earth Tides, (ed. Vieira, ), Madrid, in press Google Scholar
Schüller, K., 1986: ‘Simultaneous tidal and multi-channel input analysis as implemented in the HYCON method.’ Proc. 10th Int. Symp. Earth Tides, (ed. Vieira, ), Madrid, in press Google Scholar
Toomre, A., 1966: ‘On the “nearly diurnal free wobble” of the earth.’ Geophys. J. R. astr. Soc. 38, 335–348 Google Scholar
Wahr, J. M., 1981: ‘Body tides of an elliptical, rotating elastic and oceanless earth.’ Geophys. J. R. astr. Soc. 64, 677–703 Google Scholar
Wahr, J. M., 1985: ‘Deformation induced by polar motion.’ J. Geophys. Res. 90, 9363–9368 Google Scholar
Wahr, J. M.; Bergen, Z., 1986: ‘The effects of mantle anelasticity on nutations, earth tides, and tidal variations in rotation rate.’ Geophys. J. R. atsr. Soc. 87, 633–668 Google Scholar
Warburton, R. J.; Goodkind, J. M., 1978: ‘Detailed gravity-tide spectrum between one and four cycles per day.’ Geophys. J. R. astr. Soc. 52, 117–136 Google Scholar
Zürn, W.; Rydelek, P. A.; Richter, B., 1986: ‘The core-resonance effect in the record from the superconducting gravimeter at Bad Homburg.’ Proc. 10th Int. Symp. Earth Tides (ed. Vieira, ), Madrid, in press Google Scholar