This article has been inspired by recent papers discussing the number of channels that might have to be recorded in future (single-sensor) seismic data acquisition. This article addresses this issue and some related aspects of seismic data acquisition.

Current 3D acquisition geometries tend to have very large station spacing, something in the order of 50 or 60 m. Often shot-station spacing is even larger. As a consequence, not even the desired part of the wavefield is sampled without aliasing.

In contrast, there is a lot of talk on the use of single-sensor geometries that require drastically smaller station spacing (the...

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