Analysis of the tidal gravity observations in Three Gorges reservoir area  

作　　者：陈晓东 孙和平 胡国庆 项大鹏 郝兴华 刘明 张传中 袁曲 

机构地区：[1]Institute of Geodesy and Geophysics, Chinese Academy of Sciences [2]Institute of Seismology, China Earthquake Administration

出　　处：《Acta Seismologica Sinica(English Edition)》2007年第5期523-531,共9页

基　　金：The Knowledge Innovation Program of the Chinese Academy of Sciences (KZCX2-YW-133);National Natural Science Foundation of China (40404005 and 40574034).

摘　　要：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.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.

关 键 词：Three Gorges reservoir area tidal gravity observation comparison of the tidal gravimeters 

分 类 号：P312.4[天文地球—固体地球物理学]