We have two options to remove these artifacts. 

Option One:

One option removes footprint by trace-mixing and filtering.

Example:

Move the Slider Left or Right to see before and after

Got it
Option 2
Full (3º-35º) Stack RMS amplitude WB+150 with 400 ms gate after footprint removal
Opt 1
Full (3º-35º) Stack RMS amplitude WB+150 with 400 ms gate before foot print removal

Option Two

A KxKy option detects and removes notches in KxKy domain.  The KxKy option is the preferred option.  This works on time slices (time, line, cdp) and transforms each slice to KxKy.  Notches, local deviations, are automatically detected, and filtered.  These filters can also be modified by the user.

Example:

Move the Slider Left or Right
to Visualize the Images

Got it
footprint 3
Time 360 msec after FPR
Footprint 2
Time 360 ms before FPR