double eraGmst06	(	double	uta,
		double	utb,
		double	tta,
		double	ttb
	)

Definition at line 3 of file gmst06.c.

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

Referenced by eraEe06a(), palGmst(), palGmsta(), and t_gmst06().

{
   double t, gmst;

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

/* Greenwich mean sidereal time, IAU 2006. */
   gmst = eraAnp(eraEra00(uta, utb) +
                  (    0.014506     +
                  (  4612.156534    +
                  (     1.3915817   +
                  (    -0.00000044  +
                  (    -0.000029956 +
                  (    -0.0000000368 )
          * t) * t) * t) * t) * t) * ERFA_DAS2R);

   return gmst;

}

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