NAME

     asig - asig computes complex signal attributes

SYNOPSIS

     asig [ -Nntap ] [ -Ootap ] [ -rsrs ] [ -rere ] [ -nsns  ]  [
     -nene ] [ -nopnop ] [ -V ] [ -? ]

DESCRIPTION

     asig reads seismic data  and  computes  one  of  14  complex
     attributes.

     asig gets its data and parameters from  command  line  argu-
     ments.  These  arguments specify the input, output, starting
     record number, ending record number, starting trace  number,
     ending trace number, and desired complex signal attribute.

  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.

     -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).

     -rs rs
          Enter the desired starting record number.  If no entry,
          program assumes first record in data set.

     -re re
          Enter the desired final record number.   If  no  entry,
          program assumes last record in data set.

     -ns ns
          Enter the desired starting trace number.  If no  entry,
          program assumes first trace in each record.

     -ne ne
          Enter the desired final trace  number.   If  no  entry,
          program assumes last trace in each record.

     -t thresh
          Enter a threshold to limit  the  attributes  associated
          with  response  frequency and amplitude. 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  at
          each  sample  where the trace envelope peak exceeds the
          product of thresh*maximum envelope value.   (default  =
          0.15).

     -nop nop
          Enter a number code corresponding to the desired attri-
          bute:

          0p = 1 CARRIER

          0p = 2 QUADRATURE

          0p = 3 ENVELOPE

          0p = 4 INST. PHASE

          0p = 5 RESPONSE PHASE

          0p = 6 INST. FREQUENCY

          0p = 7 RESPONSE FREQUENCY

          0p = 8 0-PHASE DECOMPOSITION

          0p = 9 90-PHASE DECOMPOSITION

          0p = 10 RESPONSE AMPLITUDE

          0p = 11 RESPONSE LENGTH

          0p = 12 ENVELOPE SKEWNESS

          0p = 13 ENVELOPE RISE TIME

          0p = 14 INSTANTANEOUS BANWIDTAPPARENT POLARITY

          0p = 15 APPARENT POLARITY

     -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 - please report any to Don Wagner

AUTHORS

     Don Wagner, Dennis  Frampton. (from John Bodine)

COPYRIGHT

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