NAME

     taumute  - module to apply muting to tau-p traces

SYNOPSIS

     taumute [ -Nntap ] [ -Ootap ] [ -nsns ] [ -nene ] [ -rsirs ]
     [ -reire ] [ -v1vel1 ] [ -v2vel2 ] [ -tnramp ] [ -M ] [ -V ]
     [ -? ]

DESCRIPTION

     taumute can be used to remove unwanted noise  found  in  the
     forward  tau-p  transformed  record  at ray parameters above
     those of legitimate reflectors.  Two velocities  (one  shal-
     low;  one  deep)  are  used  to compute a ray parameter-time
     dependent mute line over the record.  Generally, the shallow
     velocity is the reciprocal of the largest ray parameter used
     in the transform, although this need not necessarily be  the
     case.  The shape of the curve is p*v(i)=1, where p refers to
     the ray parameter and v(i) are the velocities for each  time
     sample.

     Note:  the effect of this muting can be dramatic.

     taumute gets processing  controls  from  the  command  line.
     Reasonable  defaults  are  setup.   In addition, if no input
     file name is given, the binary trace data are expected to be
     on the standard input.

  Command line arguments
     -N ntap
          Enter the full path of the  file  containing  the  data
          set.   If  not specified, input is expected to be stan-
          dard input.  If standard input  is  not  specified  and
          there  is  no  input,  e.g., program run in background,
          expect a termination. (default standard input )

     -O otap
          Enter the full path of the output file.  If not  speci-
          fied,   output  is  expected  to  be  standard  output.
          (default standard output )

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

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

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

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

     -v1 vel1
          Enter shallow reference velocity in  ft  or  m/s.   One
          choice  is  the reciprocal of the largest ray parameter
          used in the  forward  tau-p  transform.   Setting  this
          value  too  high will result in too much of the low ray
          parameter data being muted.  (default= none )

     -v2 vel2
          Enter deep reference velocity in ft or m/s.  The  curve
          is relatively insensitive to this value but it's always
          better to give a good guess, maybe the largest stacking
          velocity.  (default = vel1 )

     -t nramp
          Enter the length on the linear mute taper  (ms).   This
          avoids sharply zeroing the data.  (default = 20 ms)

     -M   Input data was generated by MBS program slnt

     -V   Verbose mode. List command line  and  lineheader  input
          parameters.

     -?   Query mode.   With  this  flag,  taumute  will  give  a
          description  of the command line arguments and stop the
          program.

BUGS

     None

SEE ALSO

      taupf(1), taupr(1)

AUTHOR

     P. R. Gutowski, TRC

COPYRIGHT

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