Abstract
The comparative observations of the tidal gravity in Three Gorges reservoir area, recorded with the LCR-ET20 gravimeter from Institute of Geodesy and Geophysics, Chinese Academy of Sciences and the DZW-9 gravimeter from Institute of Seismology, China Earthquake Administration, are introduced. High-accuracy tidal gravity parameters in this area are obtained, and the scale factor of the DZW-9 gravimeter is also estimated at a value of −(756.06±0.05)×10−8 m·s−2V−1. The observed residuals of the corresponding instruments are investigated. Numerical results indicate that the long-term drift of the DZW-9 gravimeter appears a linear characteristic, and the observed accuracy is of the same order comparing with that of the LCR-ET20 gravimeter. The results given in the paper can provide with an effective reference model of the tidal gravity correction to the ground based and space geodesy.
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Foundation item: The Knowledge Innovation Program of the Chinese Academy of Sciences (KZCX2-YW-133) and National Natural Science Foundation of China (40404005 and 40574034).
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Chen, Xd., Sun, Hp., Hu, Gq. et al. Analysis of the tidal gravity observations in Three Gorges reservoir area. Acta Seimol. Sin. 20, 523–531 (2007). https://doi.org/10.1007/s11589-007-0523-z
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DOI: https://doi.org/10.1007/s11589-007-0523-z