摘要
介绍了中国科学院测量与地球物理研究所的LCR-ET20重力仪和中国地震局地震研究所的DZW-9重力仪在三峡水库首区的重力固体潮比对观测.获得了该地区高精度的重力固体潮潮汐参数,估算了DZW-9重力仪的格值,其值为(-756.06±0.05)×10-8(m.s-2)/V.分析了相应仪器的重力观测残差,数值结果表明DZW-9重力仪的长期漂移具有线性特征,观测精度与LCR-ET20重力仪在同一量级.本文提供的相关结果可为该地区地表和空间大地测量观测提供有效的重力潮汐改正模型.
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 in the paper. 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 ^-2）/V. The observed residuals of the corresponding instruments are investigated. Numerical results indicate that the longterm 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.
出处
《地震学报》
CSCD
北大核心
2007年第5期492-499,共8页
Acta Seismologica Sinica
基金
中国科学院知识创新工程重要方向项目(KZCX2-YW-133)
国家自然科学基金面上项目(40404005
40574034)联合资助.
关键词
三峡水库首区
重力潮汐观测潮
汐重力仪比对
Three Gorges reservoir area
tidal gravity observation
comparison of the tidalgravimeters
