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From these and previous results it follows that we have these relationships
for **travel-time**, **offset**, and **velocity** of a stack of *n*
layers as a function of *p*.
and
and
This last relation is particularly useful, since it gives us the means
for distinguishing whether non-hyperbolic move-out is due to anisotropy
or heterogeneity. A simple scheme might look like this:
- 1.
- determine
*v*(*p*) for each reflector.
- 2.
- Decompose these velocity functions into their interval counterparts.
- 3.
- Test each interval
*v*(*p*) for closeness to isotropy.

Simply put, those layers whose interval velocities are *p*-independent
are isotropic (or maybe elliptic).

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** Up:** DEVELOPMENT
** Previous:** The isotropic layer
Stanford Exploration Project

11/16/1997