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The imaging operator I chose for this experiment is the downward
continuation migration described by Prucha et al. (1999).
This operator downward continues the wavefield, slant stacks at
each depth step and then extracts an image at zero time. The regularization
operator I used was a simple gradient operator along the offset ray parameter
axis. This regularization operator assumes that the imaging is being done
with the correct velocity model so that the events along the offset ray
parameter should be flat. It will also reduce sudden variations in amplitude
along the ray parameter axis.

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Stanford Exploration Project

7/8/2003