Hale's method assumes that the data is adequately sampled in time but that problems will occur if the integral is merely sampled in space. He therefore uses an integral equally sampled in time and uses either sinc or nearest neighbor interpolation in space to perform the integration. He illustrates that nearest neighbor interpolation can be sufficient for a typical seismic dataset. However this method does not use all the available data when the integration path is flat; the equal time sampling generates widely spaced spatial samples.

11/17/1997