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## Stack of all azimuths

I start by stacking the 3D ADCIGs for the multiple and the primary over all azimuths and aperture angles. The result should be their migrated images. Figure 23 shows a comparison of the stack cubes of the primary and the water-bottom multiple. Panel (a) is the inline stacked section of the primary at crossline CMP-Y=1500 m. Panel (b) is the crossline stacked section of the primary at inline CMP-X=8450 m. Panel (c) is the inline stacked section of the multiple taken at crossline CMP-Y=462.5 m and panel (d) is the crossline stacked section of the multiple taken at inline CMP-X=8450 m. All panels are clipped at the maximum amplitude of the primary which would have been the case if they would have both been in the same panel. Notice that the vertical scale is not the same for both panels nor is the scale of the crossline axis. While the primary and the multiple appear to have the same dip in the crossline direction, the dip of the multiple is about twice greater. The multiple looks so washed out because its maximum amplitude is only about one twentieth the maximum amplitude of the primary. Figure 24 shows the same figure but with panels (a) and (b) clipped at maximum amplitude of the the primary and panels (c) and (d) clipped at the maximum amplitude of the multiple so that we can assess better the character of the multiple.

full-az-stack-clip1
Figure 23.
Stack over reflection azimuth and aperture angle of the 3DADCIGs computed for the water-bottom primary (panel (a)) and the water-bottom multiple (panel (b)). All panels clipped at the maximum amplitude of the primary.

full-az-stack-clip2
Figure 24.
Stack over reflection azimuth and aperture angle of the 3DADCIGs computed for the water-bottom primary (panel (a)) and the water-bottom multiple (panel (b)). Panels (a) and (b) clipped at the maximum amplitude of the primary. Panels (c) and (d) clipped at the maximum amplitude of the multiple.

Next: Stack of selected azimuths Up: Azimuth Illumination Previous: Azimuth Illumination

2007-10-24