Amplitude correction operators: An important quantity for my
implementation of LSJIMP was xp, the width of the primary leg of a
pegleg multiple [equation (
)]. Like the offset
vector in 3-D, xp also becomes a vector quantity:
| ![\begin{displaymath}
x_p \Rightarrow
\left[\begin{array}
{c}
x_{p,1} \ x_{p,...
...x_2^2) (V_{\rm eff}^2-V_{\rm rms}^2)} }
\end{array}\right].
\end{displaymath}](img132.gif) |
(32) |
As noted earlier in this chapter, with narrow azimuth data it makes the
most sense not to do Snell Resampling in the crossline direction.
Still, the crossline offset of the ``reduced'' CMP gather may still be
nonzero, and will affect the value of xp,1.
The differential geometric spreading correction derived in section
remains unchanged, with the exception of
substituting equation (
) for squared offset in
equations (
) and (
).
The estimation of a multiple generator's reflection coefficient in 3-D
remains similar to the 2-D case, although the model is a function of two
varibles, CMPx and CMPy, and the data may (full 3-D) or may not (narrow
azimuth) be a function of crossline offset.