SUBROUTINE iau_FK52H ( R5, D5, DR5, DD5, PX5, RV5, : RH, DH, DRH, DDH, PXH, RVH ) *+ * - - - - - - - - - - * i a u _ F K 5 2 H * - - - - - - - - - - * * Transform FK5 (J2000.0) star data into the Hipparcos system. * * This routine is part of the International Astronomical Union's * SOFA (Standards of Fundamental Astronomy) software collection. * * Status: support routine. * * Given (all FK5, equinox J2000.0, epoch J2000.0): * 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 (km/s, positive = receding) * * Returned (all Hipparcos, epoch J2000.0): * 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 (km/s, positive = receding) * * Notes: * * 1) This routine transforms FK5 star positions and proper motions into * the system of the Hipparcos catalog. * * 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 catalog are not taken into * account. * * 4) See also iau_H2FK5, iau_FK5HZ, iau_HFK5Z. * * Called: * iau_STARPV star catalog data to space motion pv-vector * iau_FK5HIP FK5 to Hipparcos rotation and spin * iau_RXP product of r-matrix and p-vector * iau_PXP vector product of two p-vectors * iau_PPP p-vector plus p-vector * iau_PVSTAR space motion pv-vector to star catalog data * * Reference: * * F.Mignard & M.Froeschle, Astron.Astrophys., 354, 732-739 (2000). * * This revision: 2017 October 12 * * SOFA release 2023-10-11 * * Copyright (C) 2023 IAU SOFA Board. See notes at end. * *----------------------------------------------------------------------- IMPLICIT NONE DOUBLE PRECISION R5, D5, DR5, DD5, PX5, RV5, : RH, DH, DRH, DDH, PXH, RVH DOUBLE PRECISION PV5(3,2), R5H(3,3), S5H(3), WXP(3), VV(3), : PVH(3,2) INTEGER J, I * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - * FK5 barycentric position/velocity pv-vector (normalized). CALL iau_STARPV ( R5, D5, DR5, DD5, PX5, RV5, PV5, J ) * FK5 to Hipparcos orientation matrix and spin vector. CALL iau_FK5HIP ( R5H, S5H ) * Make spin units per day instead of per year. DO 1 I=1,3 S5H(I) = S5H(I) / 365.25D0 1 CONTINUE * Orient the FK5 position into the Hipparcos system. CALL iau_RXP ( R5H, PV5(1,1), PVH(1,1) ) * Apply spin to the position giving an extra space motion component. CALL iau_PXP ( PV5(1,1), S5H, WXP ) * Add this component to the FK5 space motion. CALL iau_PPP ( WXP, PV5(1,2), VV ) * Orient the FK5 space motion into the Hipparcos system. CALL iau_RXP ( R5H, VV, PVH(1,2) ) * Hipparcos pv-vector to spherical. CALL iau_PVSTAR ( PVH, RH, DH, DRH, DDH, PXH, RVH, J ) * Finished. *+---------------------------------------------------------------------- * * Copyright (C) 2023 * Standards of Fundamental Astronomy Board * of the International Astronomical Union. * * ===================== * SOFA Software License * ===================== * * NOTICE TO USER: * * BY USING THIS SOFTWARE YOU ACCEPT THE FOLLOWING SIX TERMS AND * CONDITIONS WHICH APPLY TO ITS USE. * * 1. The Software is owned by the IAU SOFA Board ("SOFA"). * * 2. Permission is granted to anyone to use the SOFA software for any * purpose, including commercial applications, free of charge and * without payment of royalties, subject to the conditions and * restrictions listed below. * * 3. You (the user) may copy and distribute SOFA source code to others, * and use and adapt its code and algorithms in your own software, * on a world-wide, royalty-free basis. That portion of your * distribution that does not consist of intact and unchanged copies * of SOFA source code files is a "derived work" that must comply * with the following requirements: * * a) Your work shall be marked or carry a statement that it * (i) uses routines and computations derived by you from * software provided by SOFA under license to you; and * (ii) does not itself constitute software provided by and/or * endorsed by SOFA. * * b) The source code of your derived work must contain descriptions * of how the derived work is based upon, contains and/or differs * from the original SOFA software. * * c) The names of all routines in your derived work shall not * include the prefix "iau" or "sofa" or trivial modifications * thereof such as changes of case. * * d) The origin of the SOFA components of your derived work must * not be misrepresented; you must not claim that you wrote the * original software, nor file a patent application for SOFA * software or algorithms embedded in the SOFA software. * * e) These requirements must be reproduced intact in any source * distribution and shall apply to anyone to whom you have * granted a further right to modify the source code of your * derived work. * * Note that, as originally distributed, the SOFA software is * intended to be a definitive implementation of the IAU standards, * and consequently third-party modifications are discouraged. All * variations, no matter how minor, must be explicitly marked as * such, as explained above. * * 4. You shall not cause the SOFA software to be brought into * disrepute, either by misuse, or use for inappropriate tasks, or * by inappropriate modification. * * 5. The SOFA software is provided "as is" and SOFA makes no warranty * as to its use or performance. SOFA does not and cannot warrant * the performance or results which the user may obtain by using the * SOFA software. SOFA 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 SOFA be * liable to the user for any consequential, incidental, or special * damages, including any lost profits or lost savings, even if a * SOFA representative has been advised of such damages, or for any * claim by any third party. * * 6. The provision of any version of the SOFA 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. * * In any published work or commercial product which uses the SOFA * software directly, acknowledgement (see www.iausofa.org) is * appreciated. * * Correspondence concerning SOFA software should be addressed as * follows: * * By email: sofa@ukho.gov.uk * By post: IAU SOFA Center * HM Nautical Almanac Office * UK Hydrographic Office * Admiralty Way, Taunton * Somerset, TA1 2DN * United Kingdom * *----------------------------------------------------------------------- END