The output pseudo-primaries from equation 2 are in
frequency, source position, and receiver position. We can reorganize
this to time, offset, and source position, and then estimate a
nonstationary PEF, either shot-by-shot by estimating 2D PEFs in time
and offset, solving equation 3 for each shot, or
on the entire data set with a single 3D PEF in time, offset, and
source, solving a much larger version of equation
3. This PEF, or series of PEFs, is then used to
fill in the missing near-offset gap using equation
4 either once or for each shot.
2009-04-13