Setting Geometry SEG-2 Data: Example 2 [bnez-> topcon2]

This is an alternative approach to illustrate the use of the topcon2 program. The first step is the same as in Example 1. Program bnez is run to generate the NEZ data set of merged shot and geophone coordinates. The other steps, gensetg, ee2seg, and setgeom are replaced with calls to the topcon2 program. The downside is that there is no interactive generator (gensetg). So this is good for small problems where one just edits a bash script to run.

{topcon2}
#!/bin/bash
topcon2 LAB001.nez 1001.DAT  0001 0.0  1 30 001 030   1  0.   0   180   0   0
topcon2 LAB001.nez 1002.DAT  0001 0.0  2 30 001 030   2  0.   0   180   0   0
topcon2 LAB001.nez 1003.DAT  0001 0.0  3 30 001 030   3  0.   0   180   0   0
topcon2 LAB001.nez 1004.DAT  0001 0.0  4 30 001 030   4  0.   0   180   0   0
topcon2 LAB001.nez 1005.DAT  0001 0.0  5 30 001 030   5  0.   0   180   0   0
topcon2 LAB001.nez 1006.DAT  0001 0.0  6 30 001 030   6  0.   0   180   0   0
topcon2 LAB001.nez 1007.DAT  0001 0.0  7 30 001 030   7  0.   0   180   0   0
topcon2 LAB001.nez 1008.DAT  0001 0.0  8 30 001 030   8  0.   0   180   0   0
topcon2 LAB001.nez 1009.DAT  0001 0.0  9 30 001 030   9  0.   0   180   0   0
topcon2 LAB001.nez 1010.DAT  0001 0.0 10 30 001 030  10  0.   0   180   0   0
topcon2 LAB001.nez 1011.DAT  0001 0.0 11 30 001 030  11  0.   0   180   0   0
topcon2 LAB001.nez 1012.DAT  0001 0.0 12 30 001 030  12  0.   0   180   0   0
topcon2 LAB001.nez 1013.DAT  0001 0.0 13 30 001 030  13  0.   0   180   0   0
topcon2


The topcon2 program converts an *.DAT (SEG-2) file to an *.seg (BSEGY) file, (what egg2seg does above). However, it does this with the aid of an NEZ file which contains the [Y, X, Z] coordinates of shots and receivers. In addition, the command line of topcon2 selects information from the NEZ file and permits insertion of shot and geophone orientations. The online terminal help is as follows:


{topcon2H}
  topcon2  topf seg2f lid shdp is nch vpl vpn ir esh isa isv ira ita 
 
     topf   =  topcon file name
     seg2f  =  seg-2 file name 
     lid    =  line ID 
     shdp   =  shot depth
     is     =  shot location number
     nch    =  number of channels (nch<66)
     vp1    =  geophone station channel 1
     vpn    =  geophone station channel n
     ir     =  shot record number
     esh    =  elevation adjustment to be added 
     isa    =  source polarization azimuth (deg.)
     isv    =  source polarization vertical (deg.)
     ira    =  reference phone polarization R-axis (deg.)
     ita    =  reference phone polarization T-axis (deg.)
topcon2H




Subsections