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## D. CSP-depth migration in one-layer medium

We suggest that a reflector is flat: z=H.

First step: We represent travel-time dependence for common source gathered in a true model in the following form:

 (76)
where is incident angle.

Second step: Reverse Eiconal's continuation can be determined with help of ray's equations
 (77)

 (78)
where is incident angle of a ray which is correspondent to reverse Eiconal's continuation:
 (79)
l is a length of the ray from the point to the point . So

Third step: The location of the reflector's image can be found from the condition , that is

Having usage of equations (76),  (77),  (78), and  (79), we derive

Now we substitute this formula into equations (77) and  (78) and finally get parametric descriptions of the reflector image:

Next: 8: CLASSIFICATION OF K-OPERATORS Up: 7: GEOMETRICAL PROBLEMS OF Previous: C. 15-degree algorithm in
Stanford Exploration Project
1/13/1998