NAME

     taupnmo  - apply/remove normal moveout correction  to  plane
     wave traces

SYNOPSIS

     taupnmo [ -Nntap ] [ -Ootap ]  [  -Aatap  ]  [  -vvmod  ]  [
     -vsvscl ] [ -ttol ] [ -ddip ] [ -gvref ] [ -nsns ] [ -nene ]
     [ -rsirs ] [ -reire ] [ -svvrs ] [ -evvre ] [ -S ] [ -R ]  [
     -radon ] [ -slnt ] [ -V ] [ -? ]

DESCRIPTION

     taupnmo takes a set of plane wave traces from radonf ...  -L
     traces  and applies the dynamic (plane wave moveout) correc-
     tion given a velocity trace.  One great advantage  of  doing
     NMO  in the plane wave domain is that there is no stretch in
     the forward direction.

     taupnmo 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.  However, a velocity model must be
     specified.


  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 )

     -A atap
          Optional. Enter the name of the data set to contain the
          angle-time  data.  For every time sample (given a velo-
          city and a ray parameter) there is a unique angle.   At
          the  surface,  of  course, this is called the emergence
          angle.  This optional data set can be used as an  over-
          lay  on the plane wave traces to give the corresponding
          angle at depth for any event.  Default = no angle  out-
          put.

     -v vmod
          Enter the full path of the file containing the velocity
          model.   This file is in SIS format and is RMS velocity
          versus two way travel time. Program will  stop  if  the
          velocity  model  file  is not given. The velocity model
          must have the same sample interval and number  of  sam-
          ples  as the trace data.  There is one velocity record,
          consisting of a single velocity-time  trace,  for  each
          seismic  record.   none ).  The header of the vmod file
          must be consistent with that of  the  data  file.   For
          this  purpose, the program velin (for interpolated mul-
          tiple velocity functions)  are  used  to  generate  the
          velocity file in SIS format.

     -vs vscl
          Enter the scale factor  to  apply  to  all  velocities.
          (default = 1.0 ).

     -d dip
          Enter constant dip angle in degrees.  Default is 0.0.

     -g vref
          Enter the  reference  velocity  override.   Default  is
          either  the  first  vmod velocity or whatever is in the
          trace header for data from slnt.

     -t tol
          Enter the % of the taup ellipse (measured from p=0)  to
          include  in  the moveout.  Default = 100%.  The general
          effect of this parameter is that of a mute zone that is
          driven  by the input ray parameter and the velocity (as
          a function of time).  The smaller the value of tol  the
          deeper  the  mute  with  time.  The idea is to trim off
          just enough of the higher angles with depth to mute the
          refraction  "blobs"  of  energy  ocurring  at  the pre-
          critical/post-critical  boundary  (as  a  function   of
          time).

     -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 )

     -sv vrs
          First  velocity record to process (default = 1 )

     -ev vre
          Last  velocity record to process (default = all )


     -S   If present apply internal trace header statics  (before
          nmo).

     -R   If present remove normal moveout

     -radon
          This flag tells the program that  the  input  data  has
          been written by program radonf.

     -slnt
          This flag tells the program that  the  input  data  has
          been written by program s lnt.

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

     -?   Query mode.  With this flag, program.

BUGS

     Unknown:  this program is entirely experimental.  Good luck!

SEE ALSO

     velin, radonf

AUTHOR

     P. R. Gutowski, TRC

COPYRIGHT

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