NAME

     instpl  - module to compute instantaneous phase/polarization

SYNOPSIS

     instpl [ -Nntap ] [ -OFotap1 ] [ -OPotap2 ] [  -nsnstr  ]  [
     -nenetr ] [ -rsnrst ] [ -renred ] [ -V ] [ -? ]

DESCRIPTION

     instpl for 2-component data computes both the  instantaneous
     phase vs time and the instantaneous polarization vs time

     instpl gets both its data and its  parameters  from  command
     line  arguments.  These arguments specify the input, output,
     the start and end traces, and verbose printout, if  desired.
     The algorithms are lifted from Rene' et al, Geophysics, June
     1986, pp 1235-1251.

  Command line arguments
     -N ntap
          Enter the input data set name or file immediately after
          typing  -N.   If piping in this command line entry will
          be omitted.  The input data must be 2 component  multi-
          plexed  data,  i.e.  each  seismic  record  should have
          traces which  alternate  components.  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

     -OF otap1
          Enter the output data set name or file for the  instan-
          taneous  phase data immediately after typing -OF.  This
          output cannot be  piped.   The  output  data  set  also
          requires the full path name (see above).

     -OP otap2
          Enter the output data set name or file for the  instan-
          taneous polarization data immediately after typing -OP.
          This output cannot be piped.  The output data set  also
          requires the full path name (see above).

     -ns nstr
          Enter the start trace number.  Trace numbers below this
          value will not be processed.  The default is 1.

     -ne netr
          Enter the end trace number.  Trace numbers  above  this
          value  will  not be processed.  The default is the last
          trace number on the input data set.

     -rs nrst
          Enter start record number.  Default value is the  first
          record.

     -re nred
          Enter end record number.  Default value is last record.

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

     -?   Enter the command line  argument  '-?'  to  get  online
          help.   The program terminates after the help screen is
          printed.

COPYRIGHT

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