Objective: Execute program fd1.m to reproduce above figure. This result is produced by forward modeling the acoustic wave equation to solve for the pressure field along the enclosing boundary of the 1-scatterer model, which is a single scatterer embedded in a homogeneous medium. The reciprocity equation is implemented by backprojecting the time-reversed recorded fields at the boundary, and the result is that the Green's function G(A|B) is recovered for A and B somewhere inside the model volume.
Procedure: