## Two-point paraxial travel times using dynamic ray tracing
in wavefront orthonormal coordinates

**Vlastislav Cerveny**,
**Einar Iversen** and
**Ivan Psencik**
### Summary

Expression for the two-point paraxial travel time in wavefront orthonormal coordinates in
laterally varying, anisotropic or isotropic layered media is derived. The
wavefront orthonormal coordinate system can be used alternatively to the Cartesian coordinate system,
with dynamic ray tracing performed in ray-centred coordinates, described in an accompanying paper
Cerveny, Iversen and Psencik (2012).
It is proved that use of each coordinate system yields the same results,
although they have quite different forms.

### Whole paper

The paper is available in
PDF (101 kB).

In: Seismic Waves in Complex 3-D Structures, Report 22,
pp. 129-137, Dep. Geophys., Charles Univ., Prague, 2012.