The amplitudes that you see on the reflected waves on a field profile
are affected by many things.
Assume that corrections can be made for the spherical divergence of the wave,
the transmission coefficients through the layers,
inner bed multiples, etc.
What remains are the
*spherical-wave reflection coefficients* .
Spherical-wave reflection strengths
are not the same as the plane-wave reflection coefficients
calculated in FGDP or by means of Zoeppritz [1919] equations.
Theoretical analyses of reflection coefficient strengths
are always based on Fourier analysis.
The equations in (25) provide a link
between plane-wave reflection coefficients
and cylindrical-wave reflection coefficients.
See page 196 for going from cylinders to spheres.

10/31/1997