The current method of acquiring land seismic data usually involves the deployment of arrays of geophones, which are laid out in a regular pattern over the acquisition grid. The use of geophone arrays has some drawbacks, which are caused by the very nature of the analog array: its individual geophone outputs are simply summed, without any preprocessing applied to the array elements. Newman and Mahoney (1973) described how the performance of hardwired groups was compromised by errors in geophone positioning and coupling. Ongkiehong and Huizer (1987) showed that uncorrected perturbations can introduce pseudo-random noise into hard-wired group-formed seismic field data. Burger et al. (1998) demonstrated that 2D shot records are improved if appropriate pre-processing steps are applied to the individual sensor signals constituting the array. To facilitate this pre-processing, each individual geophone output needs to be measured. This concept of measuring every individual geophone output is referred to as point receiver measurement.