Rothman 1983 shows that post-stack residual
migration can be successfully used to improve the focusing of the
migrated sections. He also showed that migration with a given velocity
*v*_{m} is equivalent to migration with a reference velocity *v _{0}*
followed by residual migration with a velocity

Residual migration has also been used as a tool in velocity
analysis. Al-Yahya 1987 discusses a residual
migration operator in the prestack domain, and shows that it can be
posed as a function of a nondimensional parameter that is
the ratio of the correct velocity and the reference velocity used for
the initial migration. Etgen (1988, 1989) defines a
kinematic residual migration operator as a cascade of NMO and DMO, and shows
that it, again, is only a function of the nondimensional parameter
defined by Al-Yahya. Finally, Stolt 1996
defines a prestack residual migration operator in the (*f*,*k*) domain,
and shows that it depends on the reference (*v _{0}*) and the
correct (

In this short note, I review the prestack residual Stolt migration,
and show that it also can be formulated as a function of a
nondimensional parameter that is the ratio of the reference (*v _{0}*)
and correct (

6/30/1999