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The RMO functions derived above can be directly used in a
layered-based vertical updating of the velocity function
after migration.
However, in complex media it is often desirable to invert the depth errors
measured from ADCIGs into velocity-parameters perturbations
through a tomographic procedure.
To be able to apply a tomographic method,
we must perform an additional step to convert
the depth errors measured from ADCIGs into
traveltime errors.
This depth-to-time conversion can be easily
accomplished by slightly rewriting the chain of
partial derivatives in equation 35,
and obtain the following relationship:
| |
(46) |

which can be directly applied to
convert depth errors into traveltime perturbations
to be used in tomography.

** Next:** Conclusions
** Up:** Anisotropic residual moveout for
** Previous:** Arbitrary scaling of velocity
Stanford Exploration Project

5/3/2005