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Diffstat (limited to 'ast/erfa/bi00.c')
| -rw-r--r-- | ast/erfa/bi00.c | 125 |
1 files changed, 0 insertions, 125 deletions
diff --git a/ast/erfa/bi00.c b/ast/erfa/bi00.c deleted file mode 100644 index 9000221..0000000 --- a/ast/erfa/bi00.c +++ /dev/null @@ -1,125 +0,0 @@ -#include "erfa.h" - -void eraBi00(double *dpsibi, double *depsbi, double *dra) -/* -** - - - - - - - - -** e r a B i 0 0 -** - - - - - - - - -** -** Frame bias components of IAU 2000 precession-nutation models (part -** of MHB2000 with additions). -** -** Returned: -** dpsibi,depsbi double longitude and obliquity corrections -** dra double the ICRS RA of the J2000.0 mean equinox -** -** Notes: -** -** 1) The frame bias corrections in longitude and obliquity (radians) -** are required in order to correct for the offset between the GCRS -** pole and the mean J2000.0 pole. They define, with respect to the -** GCRS frame, a J2000.0 mean pole that is consistent with the rest -** of the IAU 2000A precession-nutation model. -** -** 2) In addition to the displacement of the pole, the complete -** description of the frame bias requires also an offset in right -** ascension. This is not part of the IAU 2000A model, and is from -** Chapront et al. (2002). It is returned in radians. -** -** 3) This is a supplemented implementation of one aspect of the IAU -** 2000A nutation model, formally adopted by the IAU General -** Assembly in 2000, namely MHB2000 (Mathews et al. 2002). -** -** References: -** -** Chapront, J., Chapront-Touze, M. & Francou, G., Astron. -** Astrophys., 387, 700, 2002. -** -** Mathews, P.M., Herring, T.A., Buffet, B.A., "Modeling of nutation -** and precession New nutation series for nonrigid Earth and -** insights into the Earth's interior", J.Geophys.Res., 107, B4, -** 2002. The MHB2000 code itself was obtained on 9th September 2002 -** from ftp://maia.usno.navy.mil/conv2000/chapter5/IAU2000A. -** -** Copyright (C) 2013-2016, NumFOCUS Foundation. -** Derived, with permission, from the SOFA library. See notes at end of file. -*/ -{ -/* The frame bias corrections in longitude and obliquity */ - const double DPBIAS = -0.041775 * ERFA_DAS2R, - DEBIAS = -0.0068192 * ERFA_DAS2R; - -/* The ICRS RA of the J2000.0 equinox (Chapront et al., 2002) */ - const double DRA0 = -0.0146 * ERFA_DAS2R; - - -/* Return the results (which are fixed). */ - *dpsibi = DPBIAS; - *depsbi = DEBIAS; - *dra = DRA0; - - 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. -** -*/ |