geqs
Figure 5 . The zero-offset section lies under the zeros. Observe the common midpoint gathers. Notice that even numbered receivers have a different geometry than odd numbers. Thus there are two kinds of CMP gathers with different values of the lead-in x_{0} = x0 |
geq2s
Figure 6 . This is like Figure 5 with odd valued receivers omitted. Notice that each common-midpoint gather has the same geometry. |