Unified Approach to Geopotential Field Modeling

摘要

It is shown that when both vector and gradient tensor components of a potentialfield are simultaneously available, inverse problems, such as determining the depth to the oceanic magnetic basement, can be split into a purely geometric problem, which seeks to determine the dimension and position parameters of one or more prisms and a purely geophysical problem, which seeks to determine the physical properties (i.e., the magnetization, polarization, density, etc.) of the prism. The geometrical problem is nonlinear and must be solved iteratively using standard stochastic or least-squares inversion techniques, while the geophysical problem is linear and may be solved by direct inversion once the geometric parameters have been established. Magnetic, Electric, Gravity, Inverse modeling, Poisson relations, Potential fields, Rectangular prisms.