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	This directory contains all the programs, compiling rules,
	and scripts necessary to reproduce all the figures appearing
	in the GEOPHYSICS paper:

        An exact adjoint operation pair in time extrapolation and
        its application in least-squares reverse-time migration

        by Jun Ji. DOI: 10.1190/1.3173894.

	This directory contains 3 sub-directories:

	./Src --> SEPlib program source files and compiling rules (makefile)
	./Bin --> Executable files (after compilation)
	./Fig --> Figure scripts and makefile

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  Note some source files within this heirarchy are copyrighted.
 
  Copyright (c) 2009 by the Society of Exploration Geophysicists.
  For more information, go to http://software.seg.org/2009/0003 .
  You must read and accept usage terms at:
  http://software.seg.org/disclaimer.txt before use.
 
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  1) Prerequisites 

	For program compilation, you need to have 
	Intel Fortran Compiler for Linux "ifort",
        SEPLIB (6.3.12) and Madagascar (0.9.6) installed on your system.

  2) Recompilation

	To recompile all programs, go to "./Src" directory and run "make"
	As prerequisites, you need to have 
	Intel Fortran Compiler for Linux "ifort" and 
        the SEPLIB (seplib-6.3.12) installed in your system.

	# cd Src
	# make

  3) Reproduce all figures 
	
      	To reproduce all figures presented in the paper,
	go to "./Fig" directory and run "make"

	# cd ./Fig
        # make
        # tube *.v

  4) Clean-up whole directory

	# make clean