For the converted-mode case, the angle axis of the final image
(), after the transformation, is neither
the incidence nor the reflection angle, but the average of both.
The *full-aperture* angle gathers can be transformed into
two separate angle gathers, each one representing the incidence angle
and the other representing the reflection angle. This transformation might yield useful
information for the analysis of rock properties or velocity updates
for the two different velocity models.

The next step will be to analyze how errors in either P or S velocity models are transformed in the PS-ADCIGs. This will result in both a formulation for the residual moveout of converted-mode data, and a methodology for vertical velocity updates of both P and S velocity models.

4/5/2006