The bdump program creates a partial header dump for a BSEGY file.
The normal ascending trace order I use is defined as:
bdump L141.seg 0
less bdump.lst
the result is the partial header dump for file L141.seg as shown below:
|-------------------------------| | PARTIAL SEGY HEADER DUMP | | | | L141.seg | | | |-------------------------------| ----------------------------------------------------------------------------------- Length = 2000 samples | Shot Elevation = 0.0 Sample Interval = 0.00025 sec. | Shot Depth = 0.0 Delay Time = 0 msec. | Up Hole Time = 0 msec Low Cut Filter = 4 Hz. | Shot X-COORD = 100.00 High Cut Filter = 1000 Hz. | Shot Y-COORD = 101.27 Line ID: 0001 | Shot Date (year.day) = 1997.0715 Shot Orientation: | Shot Time (hr:min) = 11:48 Azimuth= 90 Deg. Vertical=135 Deg.| Charge Size (grams)= 0 ----------------------------------------------------------------------------------- TRACE|SHOT| STATION | OFFSET| RECEIVER |VERT|1STBRK|K-GAIN|AZI|VER| # |REC.|SHOT REC| | ELEV. X-COORD Y-COORD|FOLD|(SEC.)| (dB) | | | -----|----|---------|-------|----------------------------|--|------|------|---|---| 1 | 141| 001 421| 1.46| -0.73 100.00 100.00| 3|0.0000| 20 | 0| 0| 2 | 141| 001 422| 1.46| -0.73 100.00 100.00| 3|0.0000| 20 |209| 90| 3 | 141| 001 423| 1.46| -0.73 100.00 100.00| 3|0.0000| 20 |299| 90| 4 | 141| 001 424| 0.91| -0.15 100.00 102.17| 3|0.0000| 0 | 0| 0| 5 | 141| 001 425| 0.91| -0.15 100.00 102.17| 3|0.0000| 0 | 0| 90| 6 | 141| 001 426| 0.91| -0.15 100.00 102.17| 3|0.0000| 0 |270| 90|
Note that the two down-hole horizontal traces, 2 and 3, have azimuth R= and T= as determined in the Figure 12 hodogram. The dump for L142.seg is almost identical to that above, the only differences being the source polarization (which is azimuth= rather than as show here), and of course the time of day.
pm 2018-04-08