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Geometry

We set out our 60 geophones in a $8\times8$ array with 4 empty locations. Geophone spacing was 20 cm in both X and Y directions. We then recorded shots at 23 locations spaced 40 cm apart, keeping the receiver geometry fixed. Shots consisted of 7 pings with a small hand-held hammer on a metal plate. Figure [*] shows a photograph of the study area, and the receiver array. Source and receiver geometry is shown in the left panel of Figure [*].

 
monterey
monterey
Figure 2
Photograph of study area and very high-resolution 3-D receiver array.
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This acquisition geometry led to a CMP spacing of 10 cm, as shown on the right panel in Figure [*]. The fold map (Figure [*]) is somewhat irregular as may be expected given the low number of shots; however, the fold ranges from about 6 to 13 in the main diagonal swath, which is 0.8 m wide and 1.2 m long.

 
geometry
geometry
Figure 3
The left panel shows shot (*) and receivers ($\circ$) locations. The right panel shows CMP locations.
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fold
Figure 4
Fold chart with 0.1 cm bins.
fold
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next up previous print clean
Next: Data processing Up: Rickett, et al.: STANFORD Previous: Introduction
Stanford Exploration Project
7/5/1998