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:
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.