1. True Amplitude WEM arising from True Amplitude One-way Wave Equations Yu Zhang, GuanQuan Zhang and Norman Bleistein

2. Basic Plan Derive dynamically correct one-way wave equations. Migrate data with the new equations. Apply imaging condition to dynamically correct migrated data. Show computer output.

3. Constant wave speed Fourier transform in t, x, y Forward modeling

5. What happens when? Kinematics are correct. Dynamics are not.

10. G. Q. Zhang [1993] Theorem: It works! Same eikonal equations Same transport equation

11. Wave equation migration

12. Imaging condition

13. True amplitude WEM

14. Imaging condition

15. Theorem: It Works! True Amplitude WEM TCommon-shot Kirchhoff Inversion

17. Image: U/D

19. Image: p U /p D

21. Summary True amplitude one-way wave equations with proof. True amplitude common-shot WEM with proof. Numerical check for v(z) only.