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Diffstat (limited to 'ast/erfa/pn00.c')
| -rw-r--r-- | ast/erfa/pn00.c | 186 |
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diff --git a/ast/erfa/pn00.c b/ast/erfa/pn00.c deleted file mode 100644 index f088649..0000000 --- a/ast/erfa/pn00.c +++ /dev/null @@ -1,186 +0,0 @@ -#include "erfa.h" - -void eraPn00(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 0 -** - - - - - - - - -** -** Precession-nutation, IAU 2000 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 2000 -** precession-nutation models. -** -** 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) It is permissible to re-use the same array in the returned -** arguments. The arrays are filled in the order given. -** -** Called: -** eraPr00 IAU 2000 precession adjustments -** eraObl80 mean obliquity, IAU 1980 -** eraBp00 frame bias and precession matrices, IAU 2000 -** eraCr copy r-matrix -** eraNumat form nutation matrix -** eraRxr product of two r-matrices -** -** Reference: -** -** Capitaine, N., Chapront, J., Lambert, S. and Wallace, P., -** "Expressions for the Celestial Intermediate Pole and Celestial -** Ephemeris Origin consistent with the IAU 2000A precession- -** nutation model", Astron.Astrophys. 400, 1145-1154 (2003) -** -** n.b. The celestial ephemeris origin (CEO) was renamed "celestial -** intermediate origin" (CIO) by IAU 2006 Resolution 2. -** -** Copyright (C) 2013-2016, NumFOCUS Foundation. -** Derived, with permission, from the SOFA library. See notes at end of file. -*/ -{ - double dpsipr, depspr, rbpw[3][3], rnw[3][3]; - - -/* IAU 2000 precession-rate adjustments. */ - eraPr00(date1, date2, &dpsipr, &depspr); - -/* Mean obliquity, consistent with IAU 2000 precession-nutation. */ - *epsa = eraObl80(date1, date2) + depspr; - -/* Frame bias and precession matrices and their product. */ - eraBp00(date1, date2, rb, rp, rbpw); - eraCr(rbpw, rbp); - -/* Nutation matrix. */ - eraNumat(*epsa, dpsi, deps, rnw); - eraCr(rnw, rn); - -/* Bias-precession-nutation matrix (classical). */ - eraRxr(rnw, rbpw, rbpn); - - 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. -** -*/ |