SUBROUTINE iau_H2FK5 ( RH, DH, DRH, DDH, PXH, RVH, : R5, D5, DR5, DD5, PX5, RV5 ) *+ * - - - - - - - - - - * i a u _ H 2 F K 5 * - - - - - - - - - - * * Transform Hipparcos star data into the FK5 (J2000) system. * * This routine is part of the International Astronomical Union's * SOFA (Standards of Fundamental Astronomy) software collection. * * Status: support routine. * * Given (all Hipparcos, epoch J2000): * RH d RA (radians) * DH d Dec (radians) * DRH d proper motion in RA (dRA/dt, rad/Jyear) * DDH d proper motion in Dec (dDec/dt, rad/Jyear) * PXH d parallax (arcsec) * RVH d radial velocity (+ve = receding) * * Returned (all FK5, equinox J2000, epoch J2000): * R5 d RA (radians) * D5 d Dec (radians) * DR5 d proper motion in RA (dRA/dt, rad/Jyear) * DD5 d proper motion in Dec (dDec/dt, rad/Jyear) * PX5 d parallax (arcsec) * RV5 d radial velocity (+ve = receding) * * Notes: * * 1) This routine transforms Hipparcos star positions and proper * motions into FK5 J2000. * * 2) The proper motions in RA are dRA/dt rather than * cos(Dec)*dRA/dt, and are per year rather than per century. * * 3) The FK5 to Hipparcos transformation is modeled as a pure * rotation and spin; zonal errors in the FK5 catalogue are * not taken into account. * * 4) See also iau_FK52H, iau_FK5HZ, iau_HFK5Z. * * Called: * iau_STARPV star catalog data to pv-vector * iau_FK5HIP FK5 rotation and spin wrt to Hipparcos * iau_RV2M r-vector to r-matrix * iau_RXP product of r-matrix and p-vector * iau_TRXP product of transpose of r-matrix and p-vector * iau_PXP outer (=vector=cross) product of two p-vectors * iau_PMP p-vector minus p-vector * iau_PVSTAR pv-vector to star catalog data * * Reference: * * M.Feissel & F.Mignard, Astron. Astrophys. 331, L33-L36 (1998). * * This revision: 2001 February 28 * * Copyright (C) 2001 IAU SOFA Review Board. See notes at end. * *----------------------------------------------------------------------- IMPLICIT NONE DOUBLE PRECISION RH, DH, DRH, DDH, PXH, RVH, : R5, D5, DR5, DD5, PX5, RV5 * Arcseconds to radians DOUBLE PRECISION DAS2R PARAMETER ( DAS2R = 4.848136811095359935899141D-6 ) * FK5 to Hipparcos orientation and spin (radians, radians/year) DOUBLE PRECISION EPX, EPY, EPZ DOUBLE PRECISION OMX, OMY, OMZ PARAMETER ( EPX = -19.9D-3 * DAS2R, : EPY = -9.1D-3 * DAS2R, : EPZ = +22.9D-3 * DAS2R ) PARAMETER ( OMX = -0.30D-3 * DAS2R, : OMY = +0.60D-3 * DAS2R, : OMZ = +0.70D-3 * DAS2R ) DOUBLE PRECISION PVH(3,2), R5H(3,3), S5H(3), SH(3), WXP(3), : VV(3), PV5(3,2) INTEGER J * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - * Hipparcos barycentric position/velocity pv-vector (normalized). CALL iau_STARPV ( RH, DH, DRH, DDH, PXH, RVH, PVH, J ) * FK5 to Hipparcos orientation matrix and spin vector. CALL iau_FK5HIP ( R5H, S5H ) * Orient the spin into the Hipparcos frame. CALL iau_RXP ( R5H, S5H, SH ) * De-orient the Hipparcos position into the FK5 frame. CALL iau_TRXP ( R5H, PVH(1,1), PV5(1,1) ) * Apply spin to the position giving an extra space motion component. CALL iau_PXP ( PVH(1,1), SH, WXP ) * Subtract this component from the Hipparcos space motion. CALL iau_PMP ( WXP, PVH(1,2), VV ) * De-orient the Hipparcos space motion into the FK5 frame. CALL iau_TRXP ( R5H, VV, PV5(1,2) ) * FK5 pv-vector to spherical. CALL iau_PVSTAR ( PV5, R5, D5, DR5, DD5, PX5, RV5, J ) * Finished. *+---------------------------------------------------------------------- * * Copyright (C) 2001 * Standards Of Fundamental Astronomy Review Board * of the International Astronomical Union. * * ===================== * SOFA Software License * ===================== * * NOTICE TO USER: * * BY USING THIS SOFTWARE YOU ACCEPT THE FOLLOWING TERMS AND CONDITIONS * WHICH APPLY TO ITS USE. * * 1. The Software is owned by the IAU SOFA Review Board ("the Board"). * * 2. The Software is made available free of charge for use by: * * a) private individuals for non-profit research; and * * b) non-profit educational, academic and research institutions. * * 3. Commercial use of the Software is specifically excluded from the * terms and conditions of this license. Commercial use of the * Software is subject to the prior written agreement of the Board on * terms to be agreed. * * 4. The provision of any version of the Software under the terms and * conditions specified herein does not imply that future versions * will also be made available under the same terms and conditions. * * 5. The user may modify the Software for his/her own purposes. The * user may distribute the modified software provided that the Board * is informed and that a copy of the modified software is made * available to the Board on request. All modifications made by the * user shall be clearly identified to show how the modified software * differs from the original Software, and the name(s) of the * affected routine(s) shall be changed. The original SOFA Software * License text must be present. * * 6. In any published work produced by the user and which includes * results achieved by using the Software, the user shall acknowledge * that the Software was used in producing the information contained * in such publication. * * 7. The user may incorporate or embed the Software into other software * products which he/she may then give away free of charge but not * sell provided the user makes due acknowledgement of the use which * he/she has made of the Software in creating such software * products. Any redistribution of the Software in this way shall be * made under the same terms and conditions under which the user * received it from the SOFA Center. * * 8. The user shall not cause the Software to be brought into * disrepute, either by misuse, or use for inappropriate tasks, or by * inappropriate modification. * * 9. The Software is provided to the user "as is" and the Board makes * no warranty as to its use or performance. The Board does not and * cannot warrant the performance or results which the user may * obtain by using the Software. The Board makes no warranties, * express or implied, as to non-infringement of third party rights, * merchantability, or fitness for any particular purpose. In no * event will the Board be liable to the user for any consequential, * incidental, or special damages, including any lost profits or lost * savings, even if a Board representative has been advised of such * damages, or for any claim by any third party. * * Correspondence concerning SOFA software should be addressed as * follows: * * Internet email: sofa@rl.ac.uk * Postal address: IAU SOFA Center * Rutherford Appleton Laboratory * Chilton, Didcot, Oxon OX11 0QX * United Kingdom * * *----------------------------------------------------------------------- END