NAME

     angs - Common Angle Sort

SYNOPSIS

     angs [-N ntap] [-O otap] [-I inc] [-T tsum] [-V] [-h] [-?]

DESCRIPTION

     angs produces angle sorted data from tau-P data.   The  pro-
     gram interchanges traces and records, and offers the options
     of skipping traces or summing traces as the  sort  is  done.
     The  inputs are a USP compatible seismic dataset and command
     line arguments.

     Programs angs and memangs are similar in sort,  but  memangs
     is  faster  when  performing the sort on a large memory com-
     puter.


  Command line arguments
     -N ntap
          Enter the name of the input dataset  after  typing  -N.
          This  is a USP-formatted tau-P dataset, usually created
          by program slnt.

     -O otap
          Enter the name of the output dataset after  typing  -O.
          This dataset will be a common angle sort and will be in
          USP-format.

     -I inc
          Enter the trace skipping  increment  after  typing  -I.
          The default is 1.

               To use all of the traces, enter skip of 1.
               To skip every other trace, enter a skip of 2.

     -T sum
          Enter the trace summing increment after typing -T.

               Skipping and summing  cannot  be  done  simultane-
               ously.   If  neither  of  the  skipping or summing
               parameters is entered, the program will default to
               skipping and use a trace increment of 1.

     -V   Enter -V for a verbose printout.

     -h   Enter -h for online help. Program will terminate  after
          printing this.

     -?   Enter this (or '-?' if you are running in  c-shell)  to
          get  online  help.   The  program  will terminate after
          printing this.

SEE ALSO

     mbs, memangs, presort, memsrt, sisort

BUGS

     None known.

AUTHOR

     Mary Ann Thornton

COPYRIGHT

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