and from model space to data space as

where is given by Equation 27 and is the lateral apex shift (in units of aperture angle). In this way, I transform the two-dimensional data space of ADCIGs, , into a three-dimensional model space, .

In the ideal case of migration with the correct velocity, primaries would be perfectly horizontal in the ADCIGs and would thus map in the model space to the zero-curvature () plane, , a plane of dimensions depth and apex-shift distance . Specular multiples would map to the zero apex-shift distance () plane, , a plane of dimensions depth and curvature . Diffracted multiples would map elsewhere in the cube depending on their curvature and apex-shift distance.

2007-10-24