NAME

     phzrot  - rotate the  phase  of  seismic  data  by  constant
     amount

SYNOPSIS

     phzrot [ -Nntap ] [ -Ootap ] [ -rpr ]

DESCRIPTION

     phzrot applies a user supplied constant  phase  rotation  in
     degrees to the input seismic data and writes the output.

     phzrot gets both its data and its  parameters  from  command
     line  arguments.   These arguments specify the input, output
     file, and the phase rotation.

  Command line arguments
     -N ntap
          Enter the input data set name or file immediately after
          typing -N unless the input is from a pipe in which case
          the -N entry must be omitted.  This input  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 directory '/b/vsp'.

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

     -r pr
          Enter the constant phase rotation in degrees.   Default
          = 0.

BUGS

     unknown

SEE ALSO

     timfreq, freqtim

AUTHOR

     Paul Gutowski, APR x3146, zprg03@trc.amoco.com

COPYRIGHT

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