GENSETG

This program sets up files for a second program SETGEOM 10.1.7 which does the actual setting of geometry for SEG2 data. A primary application is reciprocal refraction shooting where blocks of geophones are irregularly placed on banks of a river. Given the flexible nature of this pair of programs, it can be useful for other applications as well. This is an interactive program, and produces two text files, one for shots, one for geophones. An example log of a run is shown below:
  gensetg

SHOTS: ---------------------------
 Enter first shot file NAME number 
1001
 Enter last shot file NAME number 
1004
 Enter first SP label NUMBER  
01
 Enter increment for SP label NUMBER 
01
PHONES: ---------------------------
 Enter number of BLOCKS to define channels 
2
BLOCK Number------- 1
Channels (1) through (?) 
 Enter last channel for this block 
12
 Enter first label VP NUMBER for this block
01
 Enter label VP increment for this block
01
BLOCK Number------- 2
Channels (13) through (?) 
 Enter last channel for this block 
24
 Enter first label VP NUMBER for this block
50
 Enter label VP increment for this block
1

The two files output are shots.txt and phones.txt. The shots.txt file contains the following:

1001.seg  SP001
1002.seg  SP002
1003.seg  SP003
1004.seg  SP004
The phones.txt file contains the following:
01  VP001
02  VP002
03  VP003
04  VP004
05  VP005
06  VP006
07  VP007
08  VP008
09  VP009
10  VP010
11  VP011
12  VP012
13  VP050
14  VP051
15  VP052
16  VP053
17  VP054
18  VP055
19  VP056
20  VP057
21  VP058
22  VP059
23  VP060
24  VP061
These SP and VP labels would correspond to those in an *.nez file produced by a surveying instrument. This example might correspond to channels 1-12 being on one bank of a river, then a jumper cable might cross the river and connect to channels 13-24 with geophones on the other bank of the river. The 4 shots might then be taken with an airgun deployed from the bridge. In reality, there would likely be more shots than 4, but this illustrates the concept.