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Diffstat (limited to 'ast/erfa/fw2m.c')
| -rw-r--r-- | ast/erfa/fw2m.c | 143 |
1 files changed, 0 insertions, 143 deletions
diff --git a/ast/erfa/fw2m.c b/ast/erfa/fw2m.c deleted file mode 100644 index d1b73d2..0000000 --- a/ast/erfa/fw2m.c +++ /dev/null @@ -1,143 +0,0 @@ -#include "erfa.h" - -void eraFw2m(double gamb, double phib, double psi, double eps, - double r[3][3]) -/* -** - - - - - - - - -** e r a F w 2 m -** - - - - - - - - -** -** Form rotation matrix given the Fukushima-Williams angles. -** -** Given: -** gamb double F-W angle gamma_bar (radians) -** phib double F-W angle phi_bar (radians) -** psi double F-W angle psi (radians) -** eps double F-W angle epsilon (radians) -** -** Returned: -** r double[3][3] rotation matrix -** -** Notes: -** -** 1) Naming the following points: -** -** e = J2000.0 ecliptic pole, -** p = GCRS pole, -** E = ecliptic pole of date, -** and P = CIP, -** -** the four Fukushima-Williams angles are as follows: -** -** gamb = gamma = epE -** phib = phi = pE -** psi = psi = pEP -** eps = epsilon = EP -** -** 2) The matrix representing the combined effects of frame bias, -** precession and nutation is: -** -** NxPxB = R_1(-eps).R_3(-psi).R_1(phib).R_3(gamb) -** -** 3) Three different matrices can be constructed, depending on the -** supplied angles: -** -** o To obtain the nutation x precession x frame bias matrix, -** generate the four precession angles, generate the nutation -** components and add them to the psi_bar and epsilon_A angles, -** and call the present function. -** -** o To obtain the precession x frame bias matrix, generate the -** four precession angles and call the present function. -** -** o To obtain the frame bias matrix, generate the four precession -** angles for date J2000.0 and call the present function. -** -** The nutation-only and precession-only matrices can if necessary -** be obtained by combining these three appropriately. -** -** Called: -** eraIr initialize r-matrix to identity -** eraRz rotate around Z-axis -** eraRx rotate around X-axis -** -** Reference: -** -** Hilton, J. et al., 2006, Celest.Mech.Dyn.Astron. 94, 351 -** -** Copyright (C) 2013-2016, NumFOCUS Foundation. -** Derived, with permission, from the SOFA library. See notes at end of file. -*/ -{ -/* Construct the matrix. */ - eraIr(r); - eraRz(gamb, r); - eraRx(phib, r); - eraRz(-psi, r); - eraRx(-eps, r); - - return; - -} -/*---------------------------------------------------------------------- -** -** -** Copyright (C) 2013-2016, NumFOCUS Foundation. -** All rights reserved. -** -** This library is derived, with permission, from the International -** Astronomical Union's "Standards of Fundamental Astronomy" library, -** available from http://www.iausofa.org. -** -** The ERFA version is intended to retain identical functionality to -** the SOFA library, but made distinct through different function and -** file names, as set out in the SOFA license conditions. The SOFA -** original has a role as a reference standard for the IAU and IERS, -** and consequently redistribution is permitted only in its unaltered -** state. The ERFA version is not subject to this restriction and -** therefore can be included in distributions which do not support the -** concept of "read only" software. -** -** Although the intent is to replicate the SOFA API (other than -** replacement of prefix names) and results (with the exception of -** bugs; any that are discovered will be fixed), SOFA is not -** responsible for any errors found in this version of the library. -** -** If you wish to acknowledge the SOFA heritage, please acknowledge -** that you are using a library derived from SOFA, rather than SOFA -** itself. -** -** -** TERMS AND CONDITIONS -** -** Redistribution and use in source and binary forms, with or without -** modification, are permitted provided that the following conditions -** are met: -** -** 1 Redistributions of source code must retain the above copyright -** notice, this list of conditions and the following disclaimer. -** -** 2 Redistributions in binary form must reproduce the above copyright -** notice, this list of conditions and the following disclaimer in -** the documentation and/or other materials provided with the -** distribution. -** -** 3 Neither the name of the Standards Of Fundamental Astronomy Board, -** the International Astronomical Union nor the names of its -** contributors may be used to endorse or promote products derived -** from this software without specific prior written permission. -** -** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS -** FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE -** COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, -** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, -** BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; -** LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER -** CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN -** ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE -** POSSIBILITY OF SUCH DAMAGE. -** -*/ |