hfk5z.c   hfk5z.c 
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** **
** 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, ph[3], r5h[3][3], s5h[3], sh[3], vst[3], double t, ph[3], r5h[3][3], s5h[3], sh[3], vst[3],
rst[3][3], r5ht[3][3], pv5e[2][3], vv[3], rst[3][3], r5ht[3][3], pv5e[2][3], vv[3],
w, r, v; w, r, v;
/* Time interval from fundamental epoch J2000.0 to given date (JY). */ /* Time interval from fundamental epoch J2000.0 to given date (JY). */
t = ((date1 - DJ00) + date2) / DJY; t = ((date1 - ERFA_DJ00) + date2) / ERFA_DJY;
/* Hipparcos barycentric position vector (normalized). */ /* Hipparcos barycentric position vector (normalized). */
eraS2c(rh, dh, ph); eraS2c(rh, dh, ph);
/* FK5 to Hipparcos orientation matrix and spin vector. */ /* FK5 to Hipparcos orientation matrix and spin vector. */
eraFk5hip(r5h, s5h); eraFk5hip(r5h, s5h);
/* Rotate the spin into the Hipparcos system. */ /* Rotate the spin into the Hipparcos system. */
eraRxp(r5h, s5h, sh); eraRxp(r5h, s5h, sh);
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