SUBROUTINE iau_PVXPV ( A, B, AXB ) *+ * - - - - - - - - - - * i a u _ P V X P V * - - - - - - - - - - * * Outer (=vector=cross) product of two pv-vectors. * * This routine is part of the International Astronomical Union's * SOFA (Standards of Fundamental Astronomy) software collection. * * Status: vector/matrix support routine. * * Given: * A d(3,2) first pv-vector * B d(3,2) second pv-vector * * Returned: * AXB d(3,2) A x B * * Note: * * If the position and velocity components of the two pv-vectors are * ( Ap, Av ) and ( Bp, Bv ), the result, A x B, is the pair of * vectors ( Ap x Bp, Ap x Bv + Av x Bp ). The two vectors are the * cross-product of the two p-vectors and its derivative. * * Called: * iau_CPV copy pv-vector * iau_PXP vector product of two p-vectors * iau_PPP p-vector plus p-vector * * This revision: 2006 November 13 * * Copyright (C) 2008 IAU SOFA Review Board. See notes at end. * *----------------------------------------------------------------------- IMPLICIT NONE DOUBLE PRECISION A(3,2), B(3,2), AXB(3,2) DOUBLE PRECISION WA(3,2), WB(3,2), AXBD(3), ADXB(3) * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - * Make copies of the inputs. CALL iau_CPV ( A, WA ) CALL iau_CPV ( B, WB ) * A x B = position part of result. CALL iau_PXP ( WA(1,1), WB(1,1), AXB(1,1) ) * A x Bdot + Adot x B = velocity part of result. CALL iau_PXP ( WA(1,1), WB(1,2), AXBD ) CALL iau_PXP ( WA(1,2), WB(1,1), ADXB ) CALL iau_PPP ( AXBD, ADXB, AXB(1,2) ) * Finished. *+----------------------------------------------------------------------- * * Copyright (C) 2008 * 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. 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 adapt the SOFA software and its * algorithms for your own purposes and you may copy and distribute * a resulting "derived work" to others on a world-wide, royalty-free * basis, provided that the derived work complies 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 contain * software provided by SOFA or software that has been distributed * by or endorsed by SOFA. * * b) The source code of your derived work must contain descriptions * of how the derived work is based upon and/or differs from the * original SOFA software. * * c) The name(s) of all routine(s) that you distribute shall differ * from the SOFA names, even when the SOFA content has not been * otherwise changed. * * d) The routine-naming prefix "iau" shall not be used. * * e) 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. * * f) 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. * * 4. In any published work or commercial products which includes * results achieved by using the SOFA software, you shall acknowledge * that the SOFA software was used in obtaining those results. * * 5. You shall not cause the SOFA software to be brought into * disrepute, either by misuse, or use for inappropriate tasks, or by * inappropriate modification. * * 6. The SOFA software is provided "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 SOFA 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. * * 7. 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. * * 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