The purpose for resampling the CMP gathers in this case is to remove the aliasing artifacts from the Radon transforms. Figure rads1 shows Radon transforms of the original data and of the subsampled data which was the input to the interpolation. The interpolation results were transformed the same way for comparison. Figure interprads shows the Radon transform of the interpolated data, and a difference panel. Figure interpradsa shows the transform of the same CMP gather used in Figure rads1, but constructed from the interpolated survey. Figure interpradsb shows the result of subtracting interpradsa from Figure rads1a. The difference is very small, implying that the difference between the results of Radon demultiple on the full data and on the interpolated data would be small. Most importantly, results on the interpolated data should be better than on the subsampled input data, because the artifacts which are obvious in Figure rads1b do not appear in Figure interpradsa.
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