double eraGmst00	(	double	uta,
		double	utb,
		double	tta,
		double	ttb
	)

Definition at line 3 of file gmst00.c.

References eraAnp(), eraEra00(), ERFA_DAS2R, ERFA_DJ00, ERFA_DJC, and t.

Referenced by eraC2tpe(), eraGst00a(), eraGst00b(), and t_gmst00().

{
   double t, gmst;

/* TT Julian centuries since J2000.0. */
   t = ((tta - ERFA_DJ00) + ttb) / ERFA_DJC;

/* Greenwich Mean Sidereal Time, IAU 2000. */
   gmst = eraAnp(eraEra00(uta, utb) +
                   (     0.014506   +
                   (  4612.15739966 +
                   (     1.39667721 +
                   (    -0.00009344 +
                   (     0.00001882 )
          * t) * t) * t) * t) * ERFA_DAS2R);

   return gmst;

}

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