A Tutorial on Monochromatic Waves , by Raul Estevez

In the present study we shall review the application of a technique of numerical extrapolation of monochromatic waves, to some theoretical models. The already knwon technique, described in Claerbout (1970a), (1970b) refers to the computation of vertical or quasi-vertical downgoing waves in a lightly inhomogenous medium by means of finite difference approximations to the scalar acoustic wave equation. In our case, the technique was applied to study the downward continuation of a plane wave through a quasi-inhomogeneous medium with different two dimensional geometrical bodies of slightly different velocity embedded within it.


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