NAME

     jobdafd.x  - script to do job constant dafd frequency equal-
     ization

SYNOPSIS

     jobdafd.x [ -Nntap ] [ -Ootap ] [ -dfdf ] [ -fufu ] [  -f1f1
     ] [ -f2f2 ] [ -f3f3 ] [ -f4f4 ] [ -rsrs ] [ -rere ] [ -wwn ]
     [ -pwpw ] [ -Pprint ] [ -V ] [ -? ]

DESCRIPTION

     jobdafd.x Perform job constant spectral  balancing  using  a
     number of frequency bands with over lapping ramps.  For each
     frequency band the entire data set  is  filtered,  the  gain
     correction  curves  for  each  trace  are  averaged, and the
     resultant gain curve is applied to the entire  data  set  in
     that  pass  band.   The  results are vertically added to the
     results of previous steps until the uppermost  frequency  is
     reached.

     jobdafd.x is in fact a script that the user  can  "vi".   It
     can  therefore  be copied and modified or can provide a tem-
     plate for another entirely different function.  It uses some
     interesting usp utilities: usparg and getval set up.


  Command line arguments
     -N ntap
          Enter the full path of the  file  containing  the  data
          set.  No default or pipe allowed.


     -O otap
          Enter the output file name for the filtered traces.  No
          default or pipe allowed.

     -df df
          Frequency band increment (Hz).  This is  the  frequency
          by  which  the  previous  four  corner  frequencies are
          incremented.  No default.

     -fu fu
          Uppermost frequency allowed, i.e. corner  frequency  f4
          will  not  be  allowed to exceed this value.  Default =
          nyquist.

     -f1, -f2, -f3, -f4 f1, f2, f3, f4
          Starting values (low end) of the  corner  frequency  of
          the  trapezoidal  bandpass  filters.  These four values
          will be incremented by df for each pass until the  last
          f4 value exceeds fu.  No defaults.


     -w wn
          Length of agc window in ms (def=500).

     -pw pw
          Power of Nth root stack of  the  gain  curves.   Before
          stacking each sample of a gain curve is first raised to
          the 1/pw power (pw'th root).  After all the curves have
          been stacked the resultant gain curve is powered by the
          inverse of the root.  A setting of 2 or so is sometimes
          useful  to  prevent  a single part of the data set at a
          particular frequency from washing out the rest  of  the
          data.  Default = 1.

     -rs, -re rs, re
          Start and end sequential  record  numbers  to  be  pro-
          cessed.  Defaults are the first and last records.

     -P print
          print = 1: keep printout files; print = 0:  remove  all
          prinout files

     -?   Query mode.  With this  flag,  jobdafd.x  will  give  a
          description  of the command line arguments and stop the
          program (use '-?' if you are in c-shell).

BUGS

     unknown

SEE ALSO

     sctvf, davc, stack, editt, vstak, vmult

AUTHORS

     Paul Gutowski, APR x3146

COPYRIGHT

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