A Poor Man's Guide to Point Sources in Two Dimensions
, by Robert H. Stolt and Robert W. Clayton
The problem of implementing 2-D algorithms in 3-D media where the geology
varies in only two dimensions, is basically one of converting line sources
and receivers to point sources and receivers. Exact solutions are ponderous,
and computationally expensive. The stationary phase approximation, on the other
hand, provides relatively simple modifications to algorithms, and is accurate
in the far-field, the domain of most seismic data.
STANFORD