gmst00.c   gmst00.c 
skipping to change at line 78 skipping to change at line 78
** McCarthy, D. D., Petit, G. (eds.), IERS Conventions (2003), ** McCarthy, D. D., Petit, G. (eds.), IERS Conventions (2003),
** IERS Technical Note No. 32, BKG (2004) ** IERS Technical Note No. 32, BKG (2004)
** **
** Copyright (C) 2013, NumFOCUS Foundation. ** Copyright (C) 2013, NumFOCUS Foundation.
** Derived, with permission, from the SOFA library. See notes at end of f ile. ** Derived, with permission, from the SOFA library. See notes at end of f ile.
*/ */
{ {
double t, gmst; double t, gmst;
/* TT Julian centuries since J2000.0. */ /* TT Julian centuries since J2000.0. */
t = ((tta - DJ00) + ttb) / DJC; t = ((tta - ERFA_DJ00) + ttb) / ERFA_DJC;
/* Greenwich Mean Sidereal Time, IAU 2000. */ /* Greenwich Mean Sidereal Time, IAU 2000. */
gmst = eraAnp(eraEra00(uta, utb) + gmst = eraAnp(eraEra00(uta, utb) +
( 0.014506 + ( 0.014506 +
( 4612.15739966 + ( 4612.15739966 +
( 1.39667721 + ( 1.39667721 +
( -0.00009344 + ( -0.00009344 +
( 0.00001882 ) ( 0.00001882 )
* t) * t) * t) * t) * DAS2R); * t) * t) * t) * t) * ERFA_DAS2R);
return gmst; return gmst;
} }
/*---------------------------------------------------------------------- /*----------------------------------------------------------------------
** **
** **
** Copyright (C) 2013, NumFOCUS Foundation. ** Copyright (C) 2013, NumFOCUS Foundation.
** All rights reserved. ** All rights reserved.
** **
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