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We set out our 60 geophones in a 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
Figure 2 Photograph of study area and
very high-resolution 3-D receiver array.
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
Figure 3 The left panel shows shot (*) and
receivers () locations. The right panel shows CMP locations.
fold
Figure 4 Fold chart with 0.1 cm bins.
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Next: Data processing
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Stanford Exploration Project
7/5/1998