## Anisotropic Velocity Analysis

#### Jun Ji

A new approach of the approximation for the ray velocity curve of transversely i
sotropic media is presented and the meaning of the anelliptic term is examined f
or the two approximations
which were previously introduced by Muir (1985) and Byun et al. (1989).

Compared with stacking velocity obtained by simple hyperbolic velocity analysis
,
the additional parameters estimated by the non-hyperbolic method contain more ph
ysically meaningful geologic information regarding the anisotropy of the subsurf
ace.

Synthetic {\P}-wave model experiments demonstrate that the non-hyperbolic moveou
t formulas yield an excellent fit to time-distance curves over a wide range of r
ay angles.
Consequently, the measurement parameters are shown to reflect adequately the cha
racteristics of velocity dependence on ray angle i.e. velocity anisotropy.

#### SEP-report, vol.65, 261-270, (1989).

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(Sorry, figures are missing because it's very old paper, but you can find it
in a hardcopy version.)