DOUBLE PRECISION FUNCTION iau_FASA03 ( T )
*+
*  - - - - - - - - - - -
*   i a u _ F A S A 0 3
*  - - - - - - - - - - -
*
*  Fundamental argument, IERS Conventions (2003):
*  mean longitude of Saturn.
*
*  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 J2000.0 (Note 1)
*
*  Returned:
*     iau_FASA03  d    mean longitude of Saturn, 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
*     comes from Souchay et al. (1999) after 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
*
*     Souchay, J., Loysel, B., Kinoshita, H., Folgueira, M. 1999,
*     Astron.Astrophys.Supp.Ser. 135, 111
*
*  This revision:  2009 December 15
*
*  SOFA release 2019-07-22
*
*  Copyright (C) 2019 IAU SOFA Board.  See notes at end.
*
*-----------------------------------------------------------------------

      IMPLICIT NONE

      DOUBLE PRECISION T

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

*  2Pi.
      DOUBLE PRECISION D2PI
      PARAMETER ( D2PI = 6.283185307179586476925287D0 )

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

*  Mean longitude of Saturn (IERS Conventions 2003).
      iau_FASA03= MOD ( 0.874016757D0 + 21.3299104960D0 * T, D2PI )

*  Finished.

*+----------------------------------------------------------------------
*
*  Copyright (C) 2019
*  Standards Of Fundamental Astronomy Board
*  of the International Astronomical Union.
*
*  =====================
*  SOFA Software License
*  =====================
*
*  NOTICE TO USER:
*
*  BY USING THIS SOFTWARE YOU ACCEPT THE FOLLOWING SIX TERMS AND
*  CONDITIONS WHICH APPLY TO ITS USE.
*
*  1. The Software is owned by the IAU SOFA Board ("SOFA").
*
*  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
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*
*  3. You (the user) may copy and distribute SOFA source code to others,
*     and use and adapt its code and algorithms in your own software,
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*     distribution that does not consist of intact and unchanged copies
*     of SOFA source code files is a "derived work" that must comply
*     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
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*
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*
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*
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*     Note that, as originally distributed, the SOFA software is
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*
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*  In any published work or commercial product which uses the SOFA
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*
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*
*      By email:  sofa@ukho.gov.uk
*      By post:   IAU SOFA Center
*                 HM Nautical Almanac Office
*                 UK Hydrographic Office
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*                 Somerset, TA1 2DN
*                 United Kingdom
*
*-----------------------------------------------------------------------

      END