                      WMAP IDL Data Analysis Software V1.3

The WMAP IDL Data Analysis Software is distributed as a gzipped tar file 
wmap_IDL_v13.tar.gz or as a ZIP file wmap_IDL_v13.zip.  Once expanded, the
contents will occupy approximately 340 MB.  The size of the actual code is
small; most of this size is due to a number of reference data files used by the
code for reprojection functions.

Users who already have V1.2 of the distribution can download the much smaller
file wmap_IDLpro_v13.tar which contains only the IDL procedures plus any
updated reference files.   The file news.txt gives a list of changes since the
original V1.0 release. 

This package of IDL routines provides some limited manipulation of the MAP
time-ordered data and HEALPix maps. See the list_of_routines file in this
directory for some capabilities of the package.  Use of the WMAP software,
especially for the time-ordered data, requires familiarity with material in 
the WMAP explanatory supplement at
http://lambda.gsfc.nasa.gov/product/map/m_docs.html

The following steps are needed to install the WMAP IDL package:

1. You must have purchased an IDL license ( http://www.rsinc.com/ ).   If you
   do not have an IDL license, then you may use the procedures as metacode and
   convert them to your favorite language.    (The MAPVIEW image display widget
   is available to users without an IDL license using the IDL virtual machine.) 
   The programs should run on IDL V5.3 or later, and have been tested on 
   V5.6 - V6.0(linux) and V5.5 (Solaris and  Windows).

2.  You must have the following two IDL software packages installed: 

    (1) The IDL Astronomy Library (http://idlastro.gsfc.nasa.gov/homepage.html)
        using a version later than June 2003. 
    (2) The HEALPix Library (http://www.eso.org/science/healpix/) using 
         version 1.1 or later.

3. You must add the procedures in the /pro subdirectory to your !PATH.  For
   example, if the current (Unix) directory is /home/user/wmap then the
   following  can be placed in your IDL startup file.

    !PATH = '/home/user/wmap/pro:' + !PATH

   Alternatively, the IDL_PATH environment variable can be set prior to 
   entering IDL, e.g., 
   
   setenv IDL_PATH "/home/user/wmap/pro:${IDL_PATH}"

4. The /ref subdirectory must be defined as MAP_REF.  For example, if the 
   current directory is /home/user/wmap , then MAP_REF can be defined as 
   follows: 
    
      setenv MAP_REF  /home/user/wmap/ref
      
   Users on WINDOWS machines should set  this environment variable  
   by going to the Control Panel --> System Properties -- Advanced.   

For installation problems please contact the LAMBDA suggestion page
http://lambda.gsfc.nasa.gov/contact/contact.cfm
