text: #include "erfa.h"
  
  double eraFane03(double t)
  /*
  **  - - - - - - - - - -
  **   e r a F a n e 0 3
  **  - - - - - - - - - -
  **
  **  Fundamental argument, IERS Conventions (2003):
  **  mean longitude of Neptune.
  **
  **  Given:
  **     t     double    TDB, Julian centuries since J2000.0 (Note 1)
  **
  **  Returned (function value):
  **           double    mean longitude of Neptune, 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 adapted 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
  **
  **  Copyright (C) 2013-2019, NumFOCUS Foundation.
  **  Derived, with permission, from the SOFA library.  See notes at end of file.
  */
  {
     double a;
  
  
  /* Mean longitude of Neptune (IERS Conventions 2003). */
     a = fmod(5.311886287 + 3.8133035638 * t, ERFA_D2PI);
  
     return a;
  
  }
  /*----------------------------------------------------------------------
  **  
  **  
  **  Copyright (C) 2013-2019, NumFOCUS Foundation.
  **  All rights reserved.
  **  
  **  This library is derived, with permission, from the International
  **  Astronomical Union's "Standards of Fundamental Astronomy" library,
  **  available from http://www.iausofa.org.
  **  
  **  The ERFA version is intended to retain identical functionality to
  **  the SOFA library, but made distinct through different function and
  **  file names, as set out in the SOFA license conditions.  The SOFA
  **  original has a role as a reference standard for the IAU and IERS,
  **  and consequently redistribution is permitted only in its unaltered
  **  state.  The ERFA version is not subject to this restriction and
  **  therefore can be included in distributions which do not support the
  **  concept of "read only" software.
  **  
  **  Although the intent is to replicate the SOFA API (other than
  **  replacement of prefix names) and results (with the exception of
  **  bugs;  any that are discovered will be fixed), SOFA is not
  **  responsible for any errors found in this version of the library.
  **  
  **  If you wish to acknowledge the SOFA heritage, please acknowledge
  **  that you are using a library derived from SOFA, rather than SOFA
  **  itself.
  **  
  **  
  **  TERMS AND CONDITIONS
  **  
  **  Redistribution and use in source and binary forms, with or without
  **  modification, are permitted provided that the following conditions
  **  are met:
  **  
  **  1 Redistributions of source code must retain the above copyright
  **    notice, this list of conditions and the following disclaimer.
  **  
  **  2 Redistributions in binary form must reproduce the above copyright
  **    notice, this list of conditions and the following disclaimer in
  **    the documentation and/or other materials provided with the
  **    distribution.
  **  
  **  3 Neither the name of the Standards Of Fundamental Astronomy Board,
  **    the International Astronomical Union nor the names of its
  **    contributors may be used to endorse or promote products derived
  **    from this software without specific prior written permission.
  **  
  **  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  **  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  **  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  **  FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  **  COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  **  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  **  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  **  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  **  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  **  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  **  ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  **  POSSIBILITY OF SUCH DAMAGE.
  **  
  */
  