Abstract
A Radon transform mapping is developed which allows correct migration below plane sloping layers to be achieved. The mapping, which is the P-τ equivalent of a Fourier transform mapping, consists of p shifting and weighting. The effect of the mapping is to move the recording plane to a sloping interface. Migration then becomes conventional migration in a horizontally layered medium. Breaking the process into a sequence of steps gives a high level of insight into this particular wave‐field‐extrapolation problem. Applying the Radon transform mapping to a synthetic example of migration below a sloping layer produces excellent results. However, the method is accurate only for planar reflectors.
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