...P

Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Mail Stop 50A-1148, Berkeley, CA 94720, USA

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

...P

Center for Wave Phenomena, Colorado School of Mines, Golden, CO 80401, USA

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

...me,GEO68-02-07180732

To our knowledge, the first derivation of the revised offset continuation equation was accomplished by Joseph Higginbotham of Texaco in 1989. Unfortunately, Higginbotham's derivation never appeared in the open literature.

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

... point

Note that the scattering point $\bf{x}$ plays the role of a set of parameters in the partial differential equation for $\tau_{sr}$. To pass from a two-dimensional in-plane traveltime to a three-dimensional traveltime, one need only replace $z^2$ with $x_2^2 + z^2$. The role of $x = x_1$ remains unchanged in the solution.

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.