NAME

     fitter - fit functions to seismic data

SYNOPSIS

     fitter [ -Nntap ] [ -Ootap ] [ -nsns ] [ -nene ] [ -rsirs  ]
     [ -reire ] [ -ppoly ] [ -fitype ] [ -V ] [ -? ]

DESCRIPTION

     fitter fits a user specified function to input seismic  data
     and  outputs  the  fitted  function  evaluated at every time
     point in trace format.

     fitter gets both its data and its  parameters  from  command
     line  arguments.  These arguments specify the input, output,
     the the order of the fit, and the type of function

  Command line arguments
     -Nntap
          Enter the input data set name or file immediately after
          typing  -N;  entering  nothing  specifies a stdin pipe.
          This input put 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 'vsp' stored on the 'b' disk.

     -Ootap
          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).

     -rs irs
          (integer) First record to process (default = 1)

     -re ire
          (integer) Last record to process (default = all)

     -ns ns
          First trace in record to process (default = 1)

     -ne ne
          Last trace in record to process (default = all)

     -ppoly
          Enter the order of polynomial to fit to the gain curves
          (< 50).






     -fitype
          Enter the type of function to apply.   There  are  nine
          choices:
          itype = 0 -- polynomial in variable X (time)
          itype = 1 -- polynomial in exponential functions of X
          itype = 2 -- polynomial in gaussian functions of X
          itype = 3 -- sine functions of X
          itype = 4 -- cosine functions of X
          itype = 5 -- functions of sin (X)/X
          itype = 6 -- polynomial in natural log functions of X
          itype = 7 -- polynomial functions of 1/[xmax - X], xmax
          is maximum value of X
          itype = 8 -- polynomial functions of 1/[X - xmin], xmin
          is minimum value of X
          itype = 9 -- negative exponentials [ exp(-X) ]

     -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 this.

BUGS

     Unknown

AUTHOR

     Paul Gutowski, TRC x3146

COPYRIGHT

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