DOUBLE PRECISION FUNCTION iau_FAF03 ( T )
*+
*  - - - - - - - - - -
*   i a u _ F A F 0 3
*  - - - - - - - - - -
*
*  Fundamental argument, IERS Conventions (2003):
*  mean longitude of the Moon minus mean longitude of the ascending
*  node.
*
*  This routine is part of the International Astronomical Union's
*  SOFA (Standards of Fundamental Astronomy) software collection.
*
*  Status:  canonical model.
*
*  Given:
*     T           d    TDB, Julian centuries since J2000 (Note 1)
*
*  Returned:
*     iau_FAF03   d    F, radians (Note 2)
*
*  Notes:
*
*  1) Though T is strictly TDB, it is usually more convenient to use TT,
*     which makes no significant difference.
*
*  2) The expression used is as adopted in IERS Conventions (2003) and
*     is from Simon et al. (1994).
*
*  References:
*
*     McCarthy, D. D., Petit, G. (eds.), IERS Conventions (2003),
*     IERS Technical Note No. 32, BKG (2004)
*
*     Simon, J.-L., Bretagnon, P., Chapront, J., Chapront-Touze, M.,
*     Francou, G., Laskar, J. 1994, Astron.Astrophys. 282, 663-683
*
*  This revision:  2008 January 2
*
*  Copyright (C) 2008 IAU SOFA Review Board.  See notes at end.
*
*-----------------------------------------------------------------------

      IMPLICIT NONE

      DOUBLE PRECISION T

* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

*  Arcseconds to radians.
      DOUBLE PRECISION DAS2R
      PARAMETER ( DAS2R = 4.848136811095359935899141D-6 )

*  Arcseconds in a full circle.
      DOUBLE PRECISION TURNAS
      PARAMETER ( TURNAS = 1296000D0 )

* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

*  Mean longitude of the Moon minus that of the ascending node
*  (IERS Conventions 2003).
      iau_FAF03 = MOD (       335779.526232D0 +
     :                  T*( 1739527262.8478D0 +
     :                  T*(       - 12.7512D0 +
     :                  T*(       -  0.001037D0 +
     :                  T*(          0.00000417D0 )))), TURNAS ) * DAS2R

*  Finished.

*+-----------------------------------------------------------------------
*
*  Copyright (C) 2008
*  Standards Of Fundamental Astronomy Review Board
*  of the International Astronomical Union.
*
*  =====================
*  SOFA Software License
*  =====================
*
*  NOTICE TO USER:
*
*  BY USING THIS SOFTWARE YOU ACCEPT THE FOLLOWING TERMS AND CONDITIONS
*  WHICH APPLY TO ITS USE.
*
*  1. The Software is owned by the IAU SOFA Review Board ("the Board").
*
*  2. Permission is granted to anyone to use the SOFA software for any
*     purpose, including commercial applications, free of charge and
*     without payment of royalties, subject to the conditions and 
*     restrictions listed below.
*
*  3. You (the user) may copy and adapt the SOFA software and its 
*     algorithms for your own purposes and you may copy and distribute
*     a resulting "derived work" to others on a world-wide, royalty-free 
*     basis, provided that the derived work complies with the following
*     requirements: 
*
*     a) Your work shall be marked or carry a statement that it (i) uses
*        routines and computations derived by you from software provided 
*        by SOFA under license to you; and (ii) does not contain
*        software provided by SOFA or software that has been distributed
*        by or endorsed by SOFA.
*
*     b) The source code of your derived work must contain descriptions
*        of how the derived work is based upon and/or differs from the
*        original SOFA software.
*
*     c) The name(s) of all routine(s) that you distribute shall differ
*        from the SOFA names, even when the SOFA content has not been
*        otherwise changed.
*
*     d) The routine-naming prefix "iau" shall not be used.
*
*     e) The origin of the SOFA components of your derived work must not
*        be misrepresented;  you must not claim that you wrote the
*        original software, nor file a patent application for SOFA
*        software or algorithms embedded in the SOFA software.
*
*     f) These requirements must be reproduced intact in any source
*        distribution and shall apply to anyone to whom you have granted 
*        a further right to modify the source code of your derived work.
*
*  4. In any published work or commercial products which includes
*     results achieved by using the SOFA software, you shall acknowledge
*     that the SOFA software was used in obtaining those results.
*
*  5. You shall not cause the SOFA software to be brought into
*     disrepute, either by misuse, or use for inappropriate tasks, or by
*     inappropriate modification.
*
*  6. The SOFA software is provided "as is" and the Board makes no 
*     warranty as to its use or performance.   The Board does not and 
*     cannot warrant the performance or results which the user may obtain 
*     by using the SOFA software.  The Board makes no warranties, express 
*     or implied, as to non-infringement of third party rights,
*     merchantability, or fitness for any particular purpose.  In no
*     event will the Board be liable to the user for any consequential,
*     incidental, or special damages, including any lost profits or lost
*     savings, even if a Board representative has been advised of such
*     damages, or for any claim by any third party.
*
*  7. The provision of any version of the SOFA software under the terms 
*     and conditions specified herein does not imply that future
*     versions will also be made available under the same terms and
*     conditions.
*
*  Correspondence concerning SOFA software should be addressed as
*  follows:
*
*     Internet email: sofa@rl.ac.uk
*     Postal address: IAU SOFA Center
*                     Rutherford Appleton Laboratory
*                     Chilton, Didcot, Oxon OX11 0QX
*                     United Kingdom
*
*-----------------------------------------------------------------------

      END