NAME

     arde  -  module  to  do  maximum  entropy  deconvolution  on
     seismic traces

SYNOPSIS

     arde [ -Nntap ] [ -Ootap ] [ -sist ] [ -eiend ] [ -nsnstr  ]
     [ -nenetr ] [ -rsnrst ] [ -renred ] [ -fnfilt ] [ -wiwin ] [
     -iinc ] [ -vvel ] [ -V ] [ -? ]

DESCRIPTION

     arde does maximum entropy deconvolution of selected  seismic
     traces

     Arde 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.

  Command line arguments
     -N ntap
          Enter the input data set name or file immediately after
          typing -N.  This input file should include the complete
          path name if the file resides in a different directory.
          Example -N/vsp/dummy tells the program to look for file
          'dummy' in directory 'vsp'.

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

     -s ist
          Enter the filter application start time.   The  default
          is the beginning of the trace.

     -e iend
          Enter the filter application end time.  The default  is
          the end of the trace.

     -v vel
          Enter  design/application  window  velocity   (ft,m/s).
          Default is flat.

     -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.

     -fl fl
          Enter lo-cut frequency in Hz.

     -fh fh
          Enter hi-cut frequency in Hz.  If this  is  missing  no
          filtering will be done.

     -f nfilt
          Enter number of filter points.  This  is  actually  the
          number  of  pairs  of  frequency  resonances  or  lines
          expected in the data. For example if a single thin high
          velocity bed is causing reverberation or ringing in the
          data a single frequency pair should suffice for  decon-
          volution.  Usually  however  the source itself contains
          some resonances of varying strengths so  that  even  in
          the above example nfilt should be set to 4 or 6 (i.e. 2
          or 3 resonances). Avoid large nfilts (e.g. 20) since if
          there  are  this  many resonances they are probably ill
          defined  and  perhaps  using  standard  pred  would  be
          better.  The default is 4.

     -w iwin
          Enter sliding window length in ms. This should be 5  to
          10 times the value of nfilt.

     -i inc
          Enter operator update time  in  ms.  This  governs  how
          often  the  maximum entropy operator is recalculated as
          the window slides down the trace which depends  on  how
          rapidly  the  data  change  character  with  time.  The
          default value is the sample  interval.  Experimentation
          is  suggested  here  since  larger values mean less cpu
          time.

     -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.