Figure 3 Diagram of LMO transform to approximate
equivalent zero-offset section. a) Before
LMO correction hyperbola is symmetric about the
scattering point. The light gray line
links points of scattered energy to the location on the wavefront
causing scattering. b) After the LMO correction the hyperbola
and `Imaging box' are skewed. In-filled area
illustrates the travel-time error introduced by LMO operation.
Note that the hyperbola apex has zero error. The tilted light gray line
shows the non-centered location of apex hyperbola. This line needs
to be straighted out through a horizontal shift so that it falls
beneath the scattering point.