To install this package in your local IRAF system, take the following steps:
 
1)	The package is distributed as a tar archive; IRAF is distributed
	with a tar reader.  The tar archive may be obtained by magnetic
	tape or anonymous ftp.  For magnetic tape go to step [2] and when
	reading the tar archive simply mount the tape and use the tape
	device name for the archive name in step [4].  To obtain the package
	via ftp (assuming a UNIX computer):

	    % ftp cfa-ftp.harvard.edu
	    login: anonymous
	    password: [your user name]
	    ftp> cd pub/iraf
	    ftp> get wcstools-3.5.3.iraf.readme
	    ftp> binary
	    ftp> get wcstools-3.4.3.iraf.tar.gz
	    ftp> quit
	    % ls -l
	    -rw-r--r--  1 mink          xxxx xxx xx xx:xx wcstools-3.5.3.iraf.readme
	    -rw-r--r--  1 mink        xxxxxx xxx xx xx:xx wcstools-3.5.3.iraf.tar.gz
	    %

2)	Create a directory to contain the WCSTools external package files.
        This directory should be outside the IRAF directory tree and must
        be owned by the IRAF account.  In the following examples, this root
        directory is named /local/wcstools/.
        Make the appropriate file name substitutions for your site.
 
3)	Log in as IRAF and edit the extern.pkg file in the hlib directory to
	define the package to the CL.  From the IRAF account, outside the CL,
	you can move to this directory with the command:

            % cd $hlib

	Define the environment variable rvsao to be the pathname to the rvsao
	root directory.  UNIX pathnames must be terminated with a '/'.
	Edit extern.pkg to include:

            reset wcstools	= <directory>/wcstools-3.5.3/
            task  wcstools.pkg	= wcstools$wcstools.cl

	Near the end of the hlib$extern.pkg file, update the definition
	of helpdb so it includes the rvsao help database, copying the syntax
	already used in the string.  Add this line before the line containing
	a closing quote:
 
	    ,wcstools$lib/helpdb.mip\

4)      Add to hlib$clpackage.men the package description:
 
            wcstools - Utilities to manipulate FITS and IRAF image WCS
 
5)	Unpack the tar file into the WCSTOOLS root directory.

	On a UNIX system, where ftpdir is the pathname of the directory
	into which the package was ftp'ed and rvsao is the RVSAO root
	directory:
	    % cd $wcstools
	    % cd ..
	    % gzcat $ftpdir/wcstools-3.5.3.iraf.tar.gz | tar xvf -

	The archive file can be deleted once the package has been
	successfully installed.

6)	Go to the WCSTools directory you just filled, and then cd to Src/ .

7)	ln -s <bin directory> bin so files are put in appropriate binary
        directory for the architecture of the computer you are using
	For Solaris, for example, ln -s ../bin.solaris bin
 
8)      Make the package by typing
	    % make all >&spool.make

	The spool file should be reviewed upon completion to make sure
	there were no errors.

9)	Type "cl" or "ncl" to log in to IRAF, and "WCStools" to get the package.

10)	Up-to-date hypertext help is available on the World Wide Web at

	http://tdc-www.harvard.edu/software/wcstools