NAME

     pad_lidi  - fill out 3D pre- or post-stack volume  based  on
     indexing limits

SYNOPSIS

     pad_lidi [ -Nntap ] [ -Ootap ] [ -Lkeywd1 ] [ -Dkeywd2  ]  [
     -liminlimin  ] [ -limaxlimax ] [ -lidellidel ] [ -dimindimin
     ] [ -dimaxdimax ] [ -dideldidel ] [ -foldmfold ] [  -p  ]  [
     -tail ] [ -V ] [ -? ]

DESCRIPTION

     pad_lidi pads in missing lines and traces based on  indexing
     limits supplied on the command line. In pre-stack mode whole
     gathers will be filled in and the gathers themselves will be
     padded  out.   In  post-stack  mode the volume will be nli =
     (limax-limin)/lidel+1  records  each  with  ndi  =   (dimax-
     dimin)/didel+1  traces. In pre-stack mode the output will be
     nli*ndi records each with mfold  traces.   The  padded  data
     will be dead traces marked with the dead trace flag StaCor =
     30000

     pad_lidi works by detecting when a  key  trace  header  word
     changes  which demands you have a proper numbering scheme in
     place in the trace headers of the input data. When  it  does
     it calls this a boundary and the pads the output record with
     an appropriate number of dead traces  based  in  the  limits
     given it on the command line. In pre-stack mode it will also
     pad out each input gather.

     pad_lidi gets both its data and its parameters from  command
     line  arguments.  These arguments specify the input, output,
     the trace header words to key on, pre or post  stack  modes,
     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).

     -L keywrd1
          Enter the LI or line number trace header word to key on
          in  order  to  detect  indexing  boundaries.  Default =
          LinInd

     -D keywrd2
          Enter the DI or trace number trace header word  to  key
          on  in  order  to detect indexing boundaries. Default =
          DphInd

     -limin limin
          Enter the minimum LI (or line) number of  your  desired
          volume. Default = 1

     -limax limax
          Enter the maximum LI (or line) number of  your  desired
          volume. Default = none

     -lidel lidel
          Enter the LI (or line) number increment of your desired
          volume. Default = 1

     -dimin dimin
          Enter the minimum DI (or trace) number of your  desired
          volume. Default = 1

     -dimax dimax
          Enter the maximum DI (or trace) number of your  desired
          volume. Default = none

     -didel didel
          Enter the  DI  (or  trace)  number  increment  of  your
          desired volume. Default = 1

     -fold mfold
          Pre-stack option: Enter the override for  the  fold  or
          maximum number of traces per gather.  Default is to use
          the line header value NumTrc (recommended).

     -p   Enter the command line argument '-p' to  run  in  post-
          stack  mode. Here the number of records will be (limax-
          limin)/lidel+1 each with (dimax-dimin)/didel+1 traces

     -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.

EXAMPLES

     pad_lidi -Nindata -LLinInd -DDphInd -Ooutdata1 \
      -limin1 -limax200 -dimin50 -dimax3000 -didel10

BUGS

     unknown

SEE ALSO

     pad

AUTHOR

     Paul Gutowski

COPYRIGHT

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