Next: Calculating the slowness error Up: Measuring Previous: RMO velocity analysis

## From to

The residual moveout velocity analysis, measuring ,that was described in the previous section is an indirect way of measuring traveltime errors ,which are required to compute the perturbation in reference slowness as shown in equation ().

The traveltime errors are the differences between the observed traveltimes and the computed traveltimes using an assumed slowness model
 (33)
Both and are obtained by integrating slowness along the ray path traced through the assumed reference model,
 (34)
and this is equivalent to an integration of average slowness as follows:
 (35)
where and represent average slownesses of the true model and of the reference model, respectively.

By substituting into equation (), we get
 (36)

Therefore, we calculate from the picked and average reference slowness along the the ray trajectory.

Next: Calculating the slowness error Up: Measuring Previous: RMO velocity analysis
Stanford Exploration Project
2/5/2001