Go to the list of seismic processes.      Go to SIOSEIS introduction.
   This example is how to read an SEG-Y disk file where the shot
numbers are not monotonically increasing.  e.g.
>lsd data 10
      SHOT   TR       RP    TR ID  RANGE DELAY NSAMPS    SI   YR DAY HR MIN SEC
     15426     1   91829     0  1  -6169  3000    501  2000   99  77 11  22  11
     15306     1   91118     0  1  -6169  3000    501  2000   99  77 10  49  36
     15366     1   91473     0  1  -6169  3000    501  2000   99  77 11   5  39
     15246     1   90763     0  1  -6169  3000    501  2000   99  77 10  33  39


   DISKIN will change input files whenever IPATH is different in
successive fno/lno lists.  These data are in one file and DISKIN
needs to go backwards in the disk file to find the correct order.
The Unix ln (link) command can make diskin think the data are in two
files and diskin always starts searching a new file from the beginning.
e.g.  ln -s data data1   links data1 to file data and SIOSEIS thinks
they are different because they have different names.

   A script to order the data is:


sioseis << eof
procs diskin prout end
diskin
  allno no
  fno 15246 lno 15246 ftr 1 ltr 1 ipath data end
  fno 15306 lno 15306 ftr 1 ltr 1 ipath data1 end
  fno 15366 lno 15366 ftr 1 ltr 1 ipath data end
  fno 15426 lno 15426 ftr 1 ltr 1 ipath data1 end
end
prout
   fno 0 lno 99999 ftr 0 ltr 9999 end
end
end