In the generation, recording, and processing of seismic wave data, coherent noise waves of higher spatial frequencies (shorter wave lengths) than those in the desired and useful spatial frequency pass band tend to "alias" down into the desired pass band and to produce interfering effects. This disclosure tells how improved arrays of sources and receivers may be designed and used that, instead of attempting to suppress all spatial frequencies higher than those in the desired pass band, suppress preferentially only those particular, higher spatial frequencies that would alias back into the desired pass band.
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