DOUBLE PRECISION FUNCTION iau_FAD03 ( T )
*+
*  - - - - - - - - - -
*   i a u _ F A D 0 3
*  - - - - - - - - - -
*
*  Fundamental argument, IERS Conventions (2003):
*  mean elongation of the Moon from the Sun.
*
*  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_FAD03   d    D, 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:  2007 February 13
*
*  Copyright (C) 2007 IAU SOFA Review Board.  See notes at end.
*
*-----------------------------------------------------------------------

      IMPLICIT NONE

      DOUBLE PRECISION T

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

*  Arcseconds to radians.
      DOUBLE PRECISION AS2R
      PARAMETER ( AS2R = 4.848136811095359935899141D-6 )

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

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

*  Mean elongation of the Moon from the Sun (IERS Conventions 2003).
      iau_FAD03 = MOD (      1072260.703692D0 +
     :                  T*( 1602961601.2090D0 +
     :                  T*(        - 6.3706D0 +
     :                  T*(          0.006593D0 +
     :                  T*(        - 0.00003169D0 )))), TURNAS ) * AS2R

*  Finished.

*+----------------------------------------------------------------------
*
*  Copyright (C) 2007
*  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. The Software is made available free of charge for use by:
*
*     a) private individuals for non-profit research; and
*
*     b) non-profit educational, academic and research institutions.
*
*  3. Commercial use of the Software is specifically excluded from the
*     terms and conditions of this license.  Commercial use of the
*     Software is subject to the prior written agreement of the Board on
*     terms to be agreed.
*
*  4. The provision of any version of the 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.
*
*  5. The user may modify the Software for his/her own purposes.  The
*     user may distribute the modified software provided that the Board
*     is informed and that a copy of the modified software is made
*     available to the Board on request.  All modifications made by the
*     user shall be clearly identified to show how the modified software
*     differs from the original Software, and the name(s) of the
*     affected routine(s) shall be changed.  The original SOFA Software
*     License text must be present.
*
*  6. In any published work produced by the user and which includes
*     results achieved by using the Software, the user shall acknowledge
*     that the Software was used in producing the information contained
*     in such publication.
*
*  7. The user may incorporate or embed the Software into other software
*     products which he/she may then give away free of charge but not
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*     he/she has made of the Software in creating such software
*     products.  Any redistribution of the Software in this way shall be
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*     received it from the SOFA Center.
*
*  8. The user shall not cause the Software to be brought into
*     disrepute, either by misuse, or use for inappropriate tasks, or by
*     inappropriate modification.
*
*  9. The Software is provided to the user "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 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.
*
*  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