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To verify the accuracy of the results under realistic
but different anisotropic conditions,
in the numerical examples I used three set of anisotropic
Thomsen parameters representing three different rocks
described by Tsvankin (2001):

Notice that the GreenLight River Shale
is derived from the Green River Shale
described by Tsvankin (2001)
by halving the anisotropic parameters
( and ),
because the strong unelliptical nature
of the original one () caused
the group-slowness approximation
in equation 6 to break down,
and made the kinematic computations based on ray tracing,
and thus on group velocity and angles,
inconsistent with wavefield migrations
based on the dispersion relation in equation 7.
Notice that the GreenLight River Shale is still
the most unelliptical among the set of rocks I am using.

** Next:** Angle Gathers by anisotropic
** Up:** Phase and group angles
** Previous:** Phase and group angles
Stanford Exploration Project

5/3/2005