Spatial aliasing

Spatial aliasing is insufficient sampling of data along the space axis. This difficulty is so universal, that all migration methods must consider it. Data must be sampled at more than two points per wavelength

Wavelength

The wavelength is the distance between repeating units of a wave [i] pattern. ...

, or the wave arrival direction becomes ambiguous.

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Spatial aliasing is insufficient sampling of data along the space axis. This difficulty is so universal, that all migration methods must consider it.
Data must be sampled at more than two points per wavelength

Wavelength

The wavelength is the distance between repeating units of a wave [i] pattern. ...

, or the wave arrival direction becomes ambiguous.