Wave-equation time migration

Step 3. Wave-equation time migration

Any of the available imaging techniques, such as Kirchhoff migration, one-way wave-equation migration, or two-way reverse-time migration can be utilized to perform seismic imaging in image-ray coordinates using equation 8. Moreover, staying in this coordinate system allows migration velocity analysis and model building to be performed for estimating the Dix velocity $V_d(x_0,t_0)$ instead of the usual seismic velocity $V(x,z)$.