Dispersion effects are commonly seen in impulse responses of
migration operators. These effects are due to the digitization in
numerical solutions of wave propagating problems (Claerbout, 1985).
Reducing the data sampling intervals can suppress them. Another approach
is the use of dip-filtering. The paper will discuss the dip-filtering
method. The dispersion effects can be reduced by incorporating
the low-pass dip-filter into the migration operator, even when the sampling
interval remains unchanged.
STANFORD