Page 280 - Acquisition and Processing of Marine Seismic Data

FIG. 5.29 Test of the filter operator length on a shot gather filtered between 30 and 200 Hz. (A) Raw shot gather and its
12–200 Hz band-pass filtered outputs for (B) 50 ms, (C) 100 ms, (D) 200 ms, and (E) 400 ms operator lengths (lower panels),
and their corresponding mean amplitude spectra (upper panels).

FIG. 5.30 Schematic illustration of the relationship between the width of the pass-band in the frequency domain (top) and
the operator length in the time domain (bottom). (A) Narrow, (B) moderate, and (C) wide pass-bands in frequency domain and
their corresponding filter operators in time domain. Here f i are the widths of the pass-bands and T i are the operator lengths.
When f 1 < f 2 < f 3 , then T 1 > T 2 > T 3 .