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Acknowledgments

We thank Guojian Shan for his advice regarding finite differencing and for the two-way wave equation modeling program used for curve 2 in the top and middle panels of Figure [*], to Norm Bleinstein for bringing this topic to our attention during a recent visit to SEP, and to Bill Symes for the velocity model shown in Figure [*].

 
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triptik
Figure 4
Wavefields of a shot propagated through the velocity model in Figure [*]. Left panels: split-step; Right panels: finite difference; Upper panels: no amplitude correction; Middle panels: boundary condition correction ($\Lambda^{-1}$) correction only; Lower panels: both boundary condition ($\Lambda^{-1}$) and $\Gamma$ correction.
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Stanford Exploration Project
7/8/2003