Comparison of results with finite difference and discrete wavenumber are very satisfactory. Examples for different heterogeneous media are shown. A new approach, using tensor algebra formalism, is presented. The forward model is generated by the paraxial ray method. The inversion is performed in the frequency domain, for interface and layer parameters.
Sensitivity analysis is studied for each parameter.
Data generated by finite difference is inverted and obtained estimates are accurate. VSP field data is inverted to estimate local geologic structure.