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Diffstat (limited to 'ast/erfa/atciqz.c')
| -rw-r--r-- | ast/erfa/atciqz.c | 153 |
1 files changed, 0 insertions, 153 deletions
diff --git a/ast/erfa/atciqz.c b/ast/erfa/atciqz.c deleted file mode 100644 index d141b91..0000000 --- a/ast/erfa/atciqz.c +++ /dev/null @@ -1,153 +0,0 @@ -#include "erfa.h" - -void eraAtciqz(double rc, double dc, eraASTROM *astrom, - double *ri, double *di) -/* -** - - - - - - - - - - -** e r a A t c i q z -** - - - - - - - - - - -** -** Quick ICRS to CIRS transformation, given precomputed star- -** independent astrometry parameters, and assuming zero parallax and -** proper motion. -** -** Use of this function is appropriate when efficiency is important and -** where many star positions are to be transformed for one date. The -** star-independent parameters can be obtained by calling one of the -** functions eraApci[13], eraApcg[13], eraApco[13] or eraApcs[13]. -** -** The corresponding function for the case of non-zero parallax and -** proper motion is eraAtciq. -** -** Given: -** rc,dc double ICRS astrometric RA,Dec (radians) -** astrom eraASTROM* star-independent astrometry parameters: -** pmt double PM time interval (SSB, Julian years) -** eb double[3] SSB to observer (vector, au) -** eh double[3] Sun to observer (unit vector) -** em double distance from Sun to observer (au) -** v double[3] barycentric observer velocity (vector, c) -** bm1 double sqrt(1-|v|^2): reciprocal of Lorenz factor -** bpn double[3][3] bias-precession-nutation matrix -** along double longitude + s' (radians) -** xpl double polar motion xp wrt local meridian (radians) -** ypl double polar motion yp wrt local meridian (radians) -** sphi double sine of geodetic latitude -** cphi double cosine of geodetic latitude -** diurab double magnitude of diurnal aberration vector -** eral double "local" Earth rotation angle (radians) -** refa double refraction constant A (radians) -** refb double refraction constant B (radians) -** -** Returned: -** ri,di double CIRS RA,Dec (radians) -** -** Note: -** -** All the vectors are with respect to BCRS axes. -** -** References: -** -** Urban, S. & Seidelmann, P. K. (eds), Explanatory Supplement to -** the Astronomical Almanac, 3rd ed., University Science Books -** (2013). -** -** Klioner, Sergei A., "A practical relativistic model for micro- -** arcsecond astrometry in space", Astr. J. 125, 1580-1597 (2003). -** -** Called: -** eraS2c spherical coordinates to unit vector -** eraLdsun light deflection due to Sun -** eraAb stellar aberration -** eraRxp product of r-matrix and p-vector -** eraC2s p-vector to spherical -** eraAnp normalize angle into range +/- pi -** -** Copyright (C) 2013-2016, NumFOCUS Foundation. -** Derived, with permission, from the SOFA library. See notes at end of file. -*/ -{ - double pco[3], pnat[3], ppr[3], pi[3], w; - - -/* BCRS coordinate direction (unit vector). */ - eraS2c(rc, dc, pco); - -/* Light deflection by the Sun, giving BCRS natural direction. */ - eraLdsun(pco, astrom->eh, astrom->em, pnat); - -/* Aberration, giving GCRS proper direction. */ - eraAb(pnat, astrom->v, astrom->em, astrom->bm1, ppr); - -/* Bias-precession-nutation, giving CIRS proper direction. */ - eraRxp(astrom->bpn, ppr, pi); - -/* CIRS RA,Dec. */ - eraC2s(pi, &w, di); - *ri = eraAnp(w); - -/* Finished. */ - -} -/*---------------------------------------------------------------------- -** -** -** 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. -** -*/ |