NAME

     avbu  - module to evaluate changes in amplitude as  a  func-
     tion  of  temporal  bandwidth for interpretation of vertical
     stratigraphic sequences and lithology.

SYNOPSIS

     avbu [ -Nntap ] [ -Ootap ] [ -nsns ] [ -nene ] [ -rsirs ]  [
     -reire ] [ -f1fone ] [ -f2ftwo ] [ -f3Lf3lowr ] [ -f4Lf4lowr
     ] [ -f3Uf3uppr ] [ -f4Uf4uppr ] [ -nrinorm ] [ -itiatt  ]  [
     -imimode ] [ -V ] [ -? ]

DESCRIPTION

     avbu (more later)


     (Until then) avbu reads seismic data  and  outputs  3  trace
     records for each input trace.  Trace 1 = "max filtered avb".
     Trace 2 = w0 (omega_0). Trace 3 = w1 (omega_1).


     avbu gets both its data and its parameters from command line
     arguments.   These  arguments specify the input, output, the
     start and end records, the start and  end  traces,  required
     avb parameters and verbose printout, if desired.


  Command line arguments
     -N ntap
          Enter the input data set name or file immediately after
          typing -N unless the input is from a pipe in which case
          the -N entry must be omitted.

          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'.


     -O otap
          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).


     -ns ns
          Enter the start trace number.  The default is the first
          trace of the record.


     -ne ne
          Enter the end trace number. The  default  is  the  last
          trace of the record.


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


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


     -f1 fone
          F1 value of the Ormsby filter


     -f2 ftwo
          F2 value of the Ormsby filter


     -f3L f3lowr
          Lower F3 value of the Ormsby filter


     -f4L f4lowr
          Lower F4 value of the Ormsby filter


     -f3U f3uppr
          Upper F3 value of the Ormsby filter


     -f4U f4uppr
          Upper F4 value of the Ormsby filter


     -nr inorm
          0 = Do not normalize AVB
          1 = Normalize AVB (default)
          2 = AAA
          3 = AAArms


     -at iatt
          0 = Stack trace (default)
          1 = Amplitude envelope


     -im imode
           3 = Square value = lobe sum
           2 = Square value = lobe center value
           1 = Square value = lobe maximum value (default)
           0 = No operation
          -1 = Spike value = maximum at time = maximum
          -2 = Spike value = center at time = center
          -3 = Spike value = sum at time = maximum
          -4 = Spike value = sum at time = center


     -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.

BUGS

     They may be crawling out of the woodwork

AUTHOR

     R.O. Lindsay, M.C. Kelly

usp implementation:

     Herb Wright