Page 295 - Acquisition and Processing of Marine Seismic Data

286 5. PREPROCESSING

FIG. 5.47 Effect of AGC operator length on a final stack section with (A) no gain, (B) suitable gain with 500 ms AGC, (C) too
low gain due to a long AGC window (2000 ms), and (D) too high gain due to a short AGC window (50 ms).

P
FIG. 5.48 Effect of P value for t correction on the final stack section. (A) Gain using P ¼ 2 is too low to increase the
amplitudes of deep arrivals, and (B) gain using P ¼ 7 is too high, such that the amplitudes of early arrivals are significantly
reduced.