97 4. Near-surface reflection surveying The geometry of acquisition (Figure 4.6) must respect the following rules (Meunier, 1999): • Same source and same receiver interval e in x and y (full grid), • Receiver–array size n2i2 is equal to source and receiver intervals e2, • Source and receiver grids are shifted by half an interval e/2 in both directions. a b Figure 4.6 3D stack array geometry (after J. Meunier, 2004, IFP School course). (a) 3D stack array rules; (b) convolution of the 3D receiver and stack arrays (Meunier, 1998).
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