CDP stacking after NMO reduces the amplitudes of both random noise and reflections with other stacking velocity.
However, the signal is spatially smoothed and disturbances due to aliasing noise and side diffractions are not completely
removed.
The signal can be partly restored by a post-stack inverse filtering, but at the cost of decreasing the overall signal-to-noise
ratio. We show that dip moveout and weighted stack (equivalent to non-uniform offset spacing) reduce coherent and aliasing noise, even if the dip moveout
correction is not completely accurate.
STANFORD