Inversion of Refracted Free-Surface Multiples by Wavefield Continuation
, by Robert W. Clayton and George A. McMechan
The inversion scheme for refraction data presented SEP-24 by Clayton and
McMechan is easily extendable to free-surface multiples. The extension is
based on the property that the first-order free-surface multiple has twice
the tao if the corresponding primary, for a given ray parameter. It is
implemented in the inversion algorithm by simply doubling the frequency.
The analysis of the multiples allows an independent check on the inversion
using primaries, and on the assumption of lateral homogeneity.
STANFORD