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《Chinese Journal of Geophysics》 2003-05
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MAGNETOTELLURIC THREE-DIMENSIONAL MODELING USING THE STAGGERED-GRID FINITE DIFFERENCE METHOD

TAN HANDONG 1,2 YU QINFAN 1 JOHN BOOKER 3 WEI W T8.BZ]ENBOENBO 1 T8.BX]1 School of Geophysics and Information Technology, China University of Geosciences, Beijing 100083, China 2 Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China 3 University of Washington, Seattle, USA 1 School of Geophysics and Information Technology, China University of Geosciences, Beijing 100083, China 2 Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China 3 University of Washington, Seattle, USA  
The crucial problems of 3 T5BZ]D forward modeling using the staggered-grid finite difference method are described in detail in this paper. They are staggered-grid, discretization of integrated form of Maxwell equation, boundary condition, solving linear algebra equations and calculating D forward modeling using the staggered-grid finite difference method are described in detail in this paper. They are staggered-grid, discretization of integrated form of Maxwell equation, boundary condition, solving linear algebra equations and calculating 3 T5BZ]D tensor impedance. Giving the more explicit boundary conditions and using Bi-conjugate gradients stabilized method to solve the linear algebra equation with large coefficient matrix, we get a fast algorithm of high-precision to calculate effectively electrical and magnetic fields in the whole space. This has been proved by comparing the 3D forward modeling solutions with analytic solution to abutting quarter-spaces, and 2D forward modeling to 2D prism using the 2D finite element method. This efficient algorithm has setup basis for research of D tensor impedance. Giving the more explicit boundary conditions and using Bi-conjugate gradients stabilized method to solve the linear algebra equation with large coefficient matrix, we get a fast algorithm of high-precision to calculate effectively electrical and magnetic fields in the whole space. This has been proved by comparing the 3D forward modeling solutions with analytic solution to abutting quarter-spaces, and 2D forward modeling to 2D prism using the 2D finite element method. This efficient algorithm has setup basis for research of 3D inversion .
【Fund】: 国家自然科学基金项目 (4 0 0 740 19);; 教育部重大项目 (重大 0 2 11)资助
【CateGory Index】: P631.325
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