| Analysis of the tidal gravity observations in Three Gorges reservoir area |
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| 作者姓名： | 陈晓东 孙和平 胡国庆 项大鹏 郝兴华 刘明 张传中 袁曲 |
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| 作者单位： | Institute of Geodesy and Geophysics Chinese Academy of Sciences，Institute of Geodesy and Geophysics Chinese Academy of Sciences，Institute of Seismology China Earthquake Administration，Institute of Seismology China Earthquake Administration，Institute of Geodesy and Geophysics Chinese Academy of Sciences，Institute of Geodesy and Geophysics Chinese Academy of Sciences，Institute of Seismology China Earthquake Administration，Institute of Seismology China Earthquake Administration，Wuhan 430077 China Key Laboratory of Dynamical Geodesy Chinese Academy of Sciences Wuhan 430077 China Graduate School of Chinese Academy of Sciences Beijing 100049 China，Wuhan 430077 China Key Laboratory of Dynamical Geodesy Chinese Academy of Sciences Wuhan 430077 China，Wuhan 430071 China，Wuhan 430071 China，Wuhan 430077 China，Wuhan 430077 China，Wuhan 430071 China，Wuhan 430071 China |
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| 基金项目： | 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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| 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 pa-rameters 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. Nu-merical 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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| 关 键 词： | 三峡 地球引力 潮汐 重力仪 |
| 文章编号： | 1000-9116（2007）05-0523-09 |
| 收稿时间： | 26 January 2007 |
| 修稿时间： | 2007-01-26 |
Analysis of the tidal gravity observations in Three Gorges reservoir area |
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| Chen Xiao-dong , Sun He-ping , Hu Guo-qing , Xiang Da-peng , Hao Xing-hua , Liu Ming , Zhang Chuan-zhong and Yuan Qu.Analysis of the tidal gravity observations in Three Gorges reservoir area[J].Acta Seismologica Sinica(English Edition),2007,20(5):523-531. |
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| Authors: | Chen Xiao-dong Sun He-ping Hu Guo-qing Xiang Da-peng Hao Xing-hua Liu Ming Zhang Chuan-zhong and Yuan Qu |
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| Institution: | 1. Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 430077, China; 2. Key Laboratory of Dynamical Geodesy, Chinese Academy of Sciences, Wuhan 430077, China; 3. Graduate School of Chinese Academy of Sciences, Beijing 100049, China; 4. Institute of Seismology, China Earthquake Administration, Wuhan 430071, China |
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| 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.
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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| Keywords: | Three Gorges reservoir area tidal gravity observation comparison of the tidal gravimeters |
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