We extend the 2-D ADCIG theory to include forward-scattered
wavefields comprised of *P*-*P* diffracted and *P*-*S* scattering.
We develop a series of six equations for the six unknown parameters,
which allows us to estimate either the source- or receiver-side,
angle-dependent reflectivity directly from ODCIGs volumes. Numerical
tests illustrate forward-scattered wavefields are useful for imaging.
This observation motivates further testing of the developed algorithms
on field data scenarios, including cross-hole seismic, VSP, and
long-offset reflection data. Results of numerical experiments indicate
that information on wavefield focusing is present in forward-scattered
ADCIGs, which suggests that this algorithm may be useful tool for
improving wave-equation based tomography of transmission wavefields.

5/3/2005