Accurate amplitude calculations for time domain DMO

Abstract

The application of prestack partial migration or dip moveout to seismic data requires a very fast algorithm to provide an economical product. The time domain method offers the greatest speed, but must address the problems of aliasing, interpolation, and amplitude-phase distortions. The amplitude and phase corrections usually require some form of special processing such as Weiner-Levinson trace matching, or the trajectory method developed by Hale. The proposed algorithm computes the amplitude in the time domain by a simple method that is based on the trajectory algorithm. When care is taken to accurately treat interpolation, aliasing, and phase shift, results may be obtained that match the quality of transform methods, and without the need of matching filters.