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Diffstat (limited to 'ast/erfa/pom00.c')
-rw-r--r-- | ast/erfa/pom00.c | 124 |
1 files changed, 0 insertions, 124 deletions
diff --git a/ast/erfa/pom00.c b/ast/erfa/pom00.c deleted file mode 100644 index 0f61496..0000000 --- a/ast/erfa/pom00.c +++ /dev/null @@ -1,124 +0,0 @@ -#include "erfa.h" - -void eraPom00(double xp, double yp, double sp, double rpom[3][3]) -/* -** - - - - - - - - - - -** e r a P o m 0 0 -** - - - - - - - - - - -** -** Form the matrix of polar motion for a given date, IAU 2000. -** -** Given: -** xp,yp double coordinates of the pole (radians, Note 1) -** sp double the TIO locator s' (radians, Note 2) -** -** Returned: -** rpom double[3][3] polar-motion matrix (Note 3) -** -** Notes: -** -** 1) The arguments xp and yp are the coordinates (in radians) of the -** Celestial Intermediate Pole with respect to the International -** Terrestrial Reference System (see IERS Conventions 2003), -** measured along the meridians to 0 and 90 deg west respectively. -** -** 2) The argument sp is the TIO locator s', in radians, which -** positions the Terrestrial Intermediate Origin on the equator. It -** is obtained from polar motion observations by numerical -** integration, and so is in essence unpredictable. However, it is -** dominated by a secular drift of about 47 microarcseconds per -** century, and so can be taken into account by using s' = -47*t, -** where t is centuries since J2000.0. The function eraSp00 -** implements this approximation. -** -** 3) The matrix operates in the sense V(TRS) = rpom * V(CIP), meaning -** that it is the final rotation when computing the pointing -** direction to a celestial source. -** -** Called: -** eraIr initialize r-matrix to identity -** eraRz rotate around Z-axis -** eraRy rotate around Y-axis -** eraRx rotate around X-axis -** -** 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. -*/ -{ - -/* Construct the matrix. */ - eraIr(rpom); - eraRz(sp, rpom); - eraRy(-xp, rpom); - eraRx(-yp, rpom); - - 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. -** -*/ |