Page 261 - Acquisition and Processing of Marine Seismic Data

252 5. PREPROCESSING

FIG. 5.9 First 90 bytes of trace headers of raw seismic data (the first trace of shot number 101). (A) Before loading the geom-
etry information in the headers, and (B) after geometry loading.

FIG. 5.10 Calculation of propagation velocities of (A) direct wave, (B) seabed reflection, and (C) a subsurface reflection on a
filtered shot gather. Here, calculated velocities of direct wave, seabed reflection and a subsurface reflection are 1483, 1484, and
1544 m/s, respectively.