NAME

     response  - computes the "blocky"  response  version  of  an
     instantaneous attribute.

SYNOPSIS

     response [ -N1ntap_att ]  [  -N2ntap_env  ]  [  -Ootap  ]  [
     -tthreshold ] [ -sist ] [ -eiend ] [ -nsnstr ] [ -nenetr ] [
     -rsnrst ] [ -renred ] [ -V ] [ -? ]

DESCRIPTION

     response computes the response version of  an  instantaneous
     attribute. It requires two input files of identical size and
     configuration; "N1" contains a seismic  attribute  and  "N2"
     contains  the  energy  envelope. Response finds the value of
     the "N1"  dataset  attribute  at  the  point  at  which  the
     envelope  is  a  maximum.  One  value  is  obtained for each
     envelope lobe and is returned as a constant for  the  entire
     time  window of the envelope from trough to trough, for each
     trace.

     response gets both its data and its parameters from  command
     line  arguments.  These arguments specify the input, output,
     the design window, the start and  end  traces,  and  verbose
     printout, if desired.

  Command line arguments
     -N1 ntap_att
          Enter the input attribute dataset name or file  immedi-
          ately after typing -N1.  This input file should include
          the complete path name if the file resides  in  a  dif-
          ferent  directory.   Example  -N/b/vsp/dummy  tells the
          program to look for file 'dummy' in directory '/b/vsp'.

     -N2 ntap_env
          Enter the input envelope dataset name or  file  immedi-
          ately after typing -N2.  This input file should include
          the complete path name if the file resides  in  a  dif-
          ferent  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).

     -t threshold
          Enter a threshold to limit  the  attributes  associated
          with  low  energy  envelope  lobes. This threshold is a
          decimal multiplier ranging from 0.0 to 1.0. The program
          multiplies  this  threshold  times  the  maximum  trace
          envelope; then it computes  a  response  value  a  each
          sample  where  the trace envelope peak exceeds the pro-
          duct  of  thresh*maximum  envelope  value.  (default  =
          0.15).

     -s ist
          Enter the start time. The default is the  beginning  of
          the trace.

     -e iend
          Enter the end time. The  default  is  the  end  of  the
          trace.

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

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

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

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

     -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

     unknown

SEE ALSO

     asig(1)

AUTHOR

     Greg Partyka and Paul Garossino.

     Based on subroutines from  program  "asig"  by  Don  Wagner,
     Dennis  Frampton (from John Bodine).

COPYRIGHT

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