In this section we compare the two AVO techniques for determining the near sea-floor parameters by using a simple model of 120 m of water overlying a half-space. In this case, the direct wave and the primary reflection from the seafloor will be unaffected by reflections from subsurface structure. The acoustic/elastic properties of the model are given by the following table:
|layer||vp2 (m/s)||vs2 (m/s)||(kg/m3)|
The synthetics were generated with a maximum frequency of 30 Hz and a water depth of 120 m. The offset sampling was 25 m, the zero-offset was 12.5 m and the time sampling was 2 ms. The maximum angle of incidence was 84 and the critical angle was 62.