An Inverse Scattering Method for Reconstructing Distribution of the Velocity Perturbation in Inhomogeneous Background Medium
In wave equation tomography, there are two typical methods, one is analytical inverse methods, e.g., Geophysical diffraction tomography (GDT), etc., Radon transform method , etc.; the other is iterative inverse scattering method in frequency domain (FD-IISM) , e.g., Born IISM, etc In GDT, when the velocity variation is large, these methods fail, and the resolution of GDT is not high. In FD-IISM, because the inverse problem is ill-posed, the regularization method with smoothing condition is used to derive smoothing solution of inverse scattering problem, thus, the resolution of solution is reduced. In addition, its ability of antinoise is poor and it is very difficult to choose the damping factor.
KeywordsEntropy Migration Radon Geophysics Acoustics
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