def compute_f_iers2003(jc)
      return ((     335779.526232 + \
              (1739527262.8478    + \
              (       -12.7512    + \
              (        -0.001037  + \
              (         0.00000417) \
              * jc) * jc) * jc) * jc) % Const::TURNAS) * Const::AS2R
    rescue => e
      raise
    end
def compute_f_iers2003(jc)
      return ((     335779.526232 + \
              (1739527262.8478    + \
              (       -12.7512    + \
              (        -0.001037  + \
              (         0.00000417) \
              * jc) * jc) * jc) * jc) % Const::TURNAS) * Const::AS2R
    rescue => e
      raise
    end
=========================================================================
 Mean longitude of the Moon minus that of the ascending node (IERS 2003)

 @param:  jc         (ユリウス世紀)
 @return: longitude  (rad)
=========================================================================