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Diffstat (limited to 'ast/erfa/pn06.c')
| -rw-r--r-- | ast/erfa/pn06.c | 196 |
1 files changed, 0 insertions, 196 deletions
diff --git a/ast/erfa/pn06.c b/ast/erfa/pn06.c deleted file mode 100644 index 63cf117..0000000 --- a/ast/erfa/pn06.c +++ /dev/null @@ -1,196 +0,0 @@ -#include "erfa.h" - -void eraPn06(double date1, double date2, double dpsi, double deps, - double *epsa, - double rb[3][3], double rp[3][3], double rbp[3][3], - double rn[3][3], double rbpn[3][3]) -/* -** - - - - - - - - -** e r a P n 0 6 -** - - - - - - - - -** -** Precession-nutation, IAU 2006 model: a multi-purpose function, -** supporting classical (equinox-based) use directly and CIO-based use -** indirectly. -** -** Given: -** date1,date2 double TT as a 2-part Julian Date (Note 1) -** dpsi,deps double nutation (Note 2) -** -** Returned: -** epsa double mean obliquity (Note 3) -** rb double[3][3] frame bias matrix (Note 4) -** rp double[3][3] precession matrix (Note 5) -** rbp double[3][3] bias-precession matrix (Note 6) -** rn double[3][3] nutation matrix (Note 7) -** rbpn double[3][3] GCRS-to-true matrix (Note 8) -** -** Notes: -** -** 1) The TT date date1+date2 is a Julian Date, apportioned in any -** convenient way between the two arguments. For example, -** JD(TT)=2450123.7 could be expressed in any of these ways, -** among others: -** -** date1 date2 -** -** 2450123.7 0.0 (JD method) -** 2451545.0 -1421.3 (J2000 method) -** 2400000.5 50123.2 (MJD method) -** 2450123.5 0.2 (date & time method) -** -** The JD method is the most natural and convenient to use in -** cases where the loss of several decimal digits of resolution -** is acceptable. The J2000 method is best matched to the way -** the argument is handled internally and will deliver the -** optimum resolution. The MJD method and the date & time methods -** are both good compromises between resolution and convenience. -** -** 2) The caller is responsible for providing the nutation components; -** they are in longitude and obliquity, in radians and are with -** respect to the equinox and ecliptic of date. For high-accuracy -** applications, free core nutation should be included as well as -** any other relevant corrections to the position of the CIP. -** -** 3) The returned mean obliquity is consistent with the IAU 2006 -** precession. -** -** 4) The matrix rb transforms vectors from GCRS to J2000.0 mean -** equator and equinox by applying frame bias. -** -** 5) The matrix rp transforms vectors from J2000.0 mean equator and -** equinox to mean equator and equinox of date by applying -** precession. -** -** 6) The matrix rbp transforms vectors from GCRS to mean equator and -** equinox of date by applying frame bias then precession. It is -** the product rp x rb. -** -** 7) The matrix rn transforms vectors from mean equator and equinox -** of date to true equator and equinox of date by applying the -** nutation (luni-solar + planetary). -** -** 8) The matrix rbpn transforms vectors from GCRS to true equator and -** equinox of date. It is the product rn x rbp, applying frame -** bias, precession and nutation in that order. -** -** 9) The X,Y,Z coordinates of the Celestial Intermediate Pole are -** elements (3,1-3) of the GCRS-to-true matrix, i.e. rbpn[2][0-2]. -** -** 10) It is permissible to re-use the same array in the returned -** arguments. The arrays are filled in the stated order. -** -** Called: -** eraPfw06 bias-precession F-W angles, IAU 2006 -** eraFw2m F-W angles to r-matrix -** eraCr copy r-matrix -** eraTr transpose r-matrix -** eraRxr product of two r-matrices -** -** References: -** -** Capitaine, N. & Wallace, P.T., 2006, Astron.Astrophys. 450, 855 -** -** Wallace, P.T. & Capitaine, N., 2006, Astron.Astrophys. 459, 981 -** -** Copyright (C) 2013-2016, NumFOCUS Foundation. -** Derived, with permission, from the SOFA library. See notes at end of file. -*/ -{ - double gamb, phib, psib, eps, r1[3][3], r2[3][3], rt[3][3]; - - -/* Bias-precession Fukushima-Williams angles of J2000.0 = frame bias. */ - eraPfw06(ERFA_DJM0, ERFA_DJM00, &gamb, &phib, &psib, &eps); - -/* B matrix. */ - eraFw2m(gamb, phib, psib, eps, r1); - eraCr(r1, rb); - -/* Bias-precession Fukushima-Williams angles of date. */ - eraPfw06(date1, date2, &gamb, &phib, &psib, &eps); - -/* Bias-precession matrix. */ - eraFw2m(gamb, phib, psib, eps, r2); - eraCr(r2, rbp); - -/* Solve for precession matrix. */ - eraTr(r1, rt); - eraRxr(r2, rt, rp); - -/* Equinox-based bias-precession-nutation matrix. */ - eraFw2m(gamb, phib, psib + dpsi, eps + deps, r1); - eraCr(r1, rbpn); - -/* Solve for nutation matrix. */ - eraTr(r2, rt); - eraRxr(r1, rt, rn); - -/* Obliquity, mean of date. */ - *epsa = eps; - - 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. -** -*/ |