bred k008.seg 1 3000. .05 octave segpic bredk008.seg (input file prompt answer) 3 for clip, 0.15 for maximum time use mouse to pic first major down deflection (this produces output file bredk008.pic ) exit picrestore bredk008.dat bredk008.pic > out.pic bpic k008.seg 1 out.pic 0. mv bpick008.seg k008.seg bshf k008.seg 0 1 .05
First, the data are reduced by a 3000 m/s velocity, bulk shift of .05 seconds to make picking easier. An octave session is started and the segpic program is run (requires segpic.m, segyinfo.m, bsegin.m files be in the directory. Exit octave, and note that file bredk008.pic contains the picks as two column text file (channel, pic time). Picks are corrected for the reduction velocity by running picrestore (see 8.4.1). The picks are then uploaded to file k008.seg by program BPIC 8.4.3. This produces file bpick008.seg which is then renamed k008.seg using the move command. A quality control (QC) check is done by using program BSHF 12.1.1, static shifting the data to align on .05 seconds using the header values uploaded during the BPIC step. Figure 37 shows the data aligned on .05 seconds (red arrow). Now file k008.seg is ready for further refraction analysis.
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