NAME

     maxamp - compute maximum  or  average  amplitudes  within  a
     sliding window

SYNOPSIS

     maxamp [ -Nntap ] [ -Ootap ] [ -nsns ] [ -nene ] [ -rsirs  ]
     [ -reire ] [ -wwind ] [ -owindo ] [ -max ] [ -ave ] [ -rms ]
     [ -med ] [ -roll ] [ -sgn ] [ -V ] [ -? ]

DESCRIPTION

     maxamp runs a sliding window down each trace and  outputs  a
     maximum amplitude value for each window position. The output
     trace will contain as many samples as there are window posi-
     tions. Several different styles of max may be chosen.

     maxamp gets both its data and its  parameters  from  command
     line  arguments.  These arguments specify the input, output,
     record and trace limits, window length and its overlap,  and
     the different styles of maximum calculation.

  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)

     -wwind
          Enter the sliding window length in ms  to  compute  the
          amplitude maximum. (default = 500ms)


     -owindo
          Enter the window overlap in ms.  This  and  the  window
          length itself determine the number of window positions.
          This can be computed by dividing the total input  trace
          minus  the  window length length by the window overlap.
          (default = 250ms)

     -max Enter the command line argument '-max' to  compute  the
          maximum absolute amplitude in each sliding window

     -ave Enter the command line argument '-ave' to  compute  the
          average RMS amplitude based on live samples

     -rms Enter the command line argument '-rms' to  compute  the
          average RMS amplitude based on live samples

     -med Enter the command line argument '-med' to  compute  the
          median absolute amplitude in each sliding window

     -sgn Enter the command line argument '-sgn' to preserve sign
          within  the  sliding  window.  The sign for each window
          position is computed by finding the  average  value  of
          all  amplitudes within the window and using the sign of
          the average.

     -roll
          Enter the command line argument  '-roll'  to  roll  the
          window down the trace one sample at a time.

     -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, ATTC x3146

COPYRIGHT

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