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Diffstat (limited to 'ast/erfa/c2teqx.c')
-rw-r--r-- | ast/erfa/c2teqx.c | 131 |
1 files changed, 0 insertions, 131 deletions
diff --git a/ast/erfa/c2teqx.c b/ast/erfa/c2teqx.c deleted file mode 100644 index c86e76c..0000000 --- a/ast/erfa/c2teqx.c +++ /dev/null @@ -1,131 +0,0 @@ -#include "erfa.h" - -void eraC2teqx(double rbpn[3][3], double gst, double rpom[3][3], - double rc2t[3][3]) -/* -** - - - - - - - - - - -** e r a C 2 t e q x -** - - - - - - - - - - -** -** Assemble the celestial to terrestrial matrix from equinox-based -** components (the celestial-to-true matrix, the Greenwich Apparent -** Sidereal Time and the polar motion matrix). -** -** Given: -** rbpn double[3][3] celestial-to-true matrix -** gst double Greenwich (apparent) Sidereal Time (radians) -** rpom double[3][3] polar-motion matrix -** -** Returned: -** rc2t double[3][3] celestial-to-terrestrial matrix (Note 2) -** -** Notes: -** -** 1) This function constructs the rotation matrix that transforms -** vectors in the celestial system into vectors in the terrestrial -** system. It does so starting from precomputed components, namely -** the matrix which rotates from celestial coordinates to the -** true equator and equinox of date, the Greenwich Apparent Sidereal -** Time and the polar motion matrix. One use of the present function -** is when generating a series of celestial-to-terrestrial matrices -** where only the Sidereal Time changes, avoiding the considerable -** overhead of recomputing the precession-nutation more often than -** necessary to achieve given accuracy objectives. -** -** 2) The relationship between the arguments is as follows: -** -** [TRS] = rpom * R_3(gst) * rbpn * [CRS] -** -** = rc2t * [CRS] -** -** where [CRS] is a vector in the Geocentric Celestial Reference -** System and [TRS] is a vector in the International Terrestrial -** Reference System (see IERS Conventions 2003). -** -** Called: -** eraCr copy r-matrix -** eraRz rotate around Z-axis -** eraRxr product of two r-matrices -** -** Reference: -** -** McCarthy, D. D., Petit, G. (eds.), IERS Conventions (2003), -** IERS Technical Note No. 32, BKG (2004) -** -** Copyright (C) 2013-2016, NumFOCUS Foundation. -** Derived, with permission, from the SOFA library. See notes at end of file. -*/ -{ - double r[3][3]; - - -/* Construct the matrix. */ - eraCr(rbpn, r); - eraRz(gst, r); - eraRxr(rpom, r, rc2t); - - 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. -** -*/ |