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Next: ACKNOWLEDGEMENTS Up: Bevc and Lumley: Anti-aliasing? Previous: Migration with low velocity


We have presented a simple inequality which can be used to determine whether operator aliasing is a factor in Kirchhoff migration. The same criteria can be used for DMO, velocity analysis, wave-equation datuming or any other integral operator which is applied to seismic data. The salt dome example illustrates that sometimes some portions of a data set may be sampled adequately, so that operator aliasing is not a problem. If these are the regions of interest, computational effort and time can be reduced by not undertaking the added expense of anti-alising.