Comprehensive comparison and analysis of the tidal gravity observations obtained with superconducting gravimeters at stations in China, Belgium and France |
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Authors: | Heping Sun Houze Xu B Ducarme J Hinderer |
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Institution: | (1) Institute of Geodesy and Geophysics, Chinese Academy of Sciences, 430077 Wuhan, China;(2) Royal Observatory of Belgium, B-1180 Brussels, Belgium;(3) School and Observatory of the Physics of the Earth, 67084 Strasbourg, France |
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Abstract: | The long-term tidal gravity observations of about 27 a obtained with superconducting gravimeters (SG) at stations in Wuhan
(China), Brussels (Belgium) and Strasbourg (France) are analyzed comprehensively. The quality factors of these observations
at various stations are obtained and the tidal parameters are determined accurately. The efficiency when using various procedures
on improving accuracy of the tidal parameters is discussed. The loading corrections on tidal parameters are carried out based
on the global ocean tidal models. The correlations between the observed residuals and air pressure change are studied, the
atmospheric gravity admittances in both temporal and frequency domains are determined, and the possible reasons of inducing
the discrepancy between the observed tidal parameters and those in the standard tidal models are studied. |
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Keywords: | Kewords" target="_blank">Kewords tidal gravity superconducting gravimeter comprehensive comparison accuracy analysis |
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