NAME

     rsort - randomly sorting and/or unsorting traces

SYNOPSIS

     rsort [ -Nntap ] [ -Ootap ] [ -rsirs ] [ -reire ] [ -sdiseed
     ] [ -R ] [ -S ] [ -V ] [ -? ]

DESCRIPTION

     Rsort sorts seismic traces so that they appear in a  pseudo-
     random  order  within  a  record.   Rsort  optionally  sorts
     seismic traces back to their original sequential order.   It
     accomplishes  this by using the same seed to a random number
     generator and applying the inverse of the random process  to
     restore the original trace order.

     Rsort gets data and processing parameters from command  line
     arguments.   These  arguments  specify  the  input,  output,
     whether to sort randomly , or whether to sort sequentially.

  Command line arguments
     -Nntap
          Enter input data set name  or  file  immediately  after
          typing  -N;  entering  nothing  specifies a stdin pipe.
          This file should include the complete path name if  the
          file   resides   in  a  different  directory.   Example
          -n/b/vsp/dummy tells  the  program  to  look  for  file
          'dummy' in subdirectory 'vsp' stored in directory b.

     -Ootap
          Enter output data set name or  file  immediately  after
          typing  -O.  This output file is not required when pip-
          ing the output to another process.  The output data set
          also requires the full path name (see above).

     -rs irs
          (integer)    Enter    first    record    to    process.
          (default = 1)

     -re ire
          (integer)    Enter    last    record    to     process.
          (default = all)

     -sd iseed
          (integer) Enter the randomization seed. If using the -S
          option,  be sure the seed is equal to the original seed
          used to randomize. (default = 32357)

     -R   Enter command line argument '-R' to get a  random  sort
          of traces.

     -S   Enter commmand line argument '-S' to get  a  sequential
          sort  of  traces.   (NOTE:   Use either '-R' or '-S' as
          command line arguments but not both arguments  for  the
          same execution of the program.)

     -V   Enter the command line argument '-V' to get  additional
          printout.

     -?   Enter this (or '-?' if you are running in  c-shell)  to
          get  online  help.   The  program  will terminate after
          printing a list of parameters.

COPYRIGHT

     copyright 2001, Amoco Production Company
               All Rights Reserved
          an affiliate of BP America Inc.