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Diffstat (limited to 'ast/erfa/apio.c')
| -rw-r--r-- | ast/erfa/apio.c | 213 |
1 files changed, 0 insertions, 213 deletions
diff --git a/ast/erfa/apio.c b/ast/erfa/apio.c deleted file mode 100644 index ebc5569..0000000 --- a/ast/erfa/apio.c +++ /dev/null @@ -1,213 +0,0 @@ -#include "erfa.h" - -void eraApio(double sp, double theta, - double elong, double phi, double hm, double xp, double yp, - double refa, double refb, - eraASTROM *astrom) -/* -** - - - - - - - - -** e r a A p i o -** - - - - - - - - -** -** For a terrestrial observer, prepare star-independent astrometry -** parameters for transformations between CIRS and observed -** coordinates. The caller supplies the Earth orientation information -** and the refraction constants as well as the site coordinates. -** -** Given: -** sp double the TIO locator s' (radians, Note 1) -** theta double Earth rotation angle (radians) -** elong double longitude (radians, east +ve, Note 2) -** phi double geodetic latitude (radians, Note 2) -** hm double height above ellipsoid (m, geodetic Note 2) -** xp,yp double polar motion coordinates (radians, Note 3) -** refa double refraction constant A (radians, Note 4) -** refb double refraction constant B (radians, Note 4) -** -** Returned: -** astrom eraASTROM* star-independent astrometry parameters: -** pmt double unchanged -** eb double[3] unchanged -** eh double[3] unchanged -** em double unchanged -** v double[3] unchanged -** bm1 double unchanged -** bpn double[3][3] unchanged -** along double longitude + s' (radians) -** xpl double polar motion xp wrt local meridian (radians) -** ypl double polar motion yp wrt local meridian (radians) -** sphi double sine of geodetic latitude -** cphi double cosine of geodetic latitude -** diurab double magnitude of diurnal aberration vector -** eral double "local" Earth rotation angle (radians) -** refa double refraction constant A (radians) -** refb double refraction constant B (radians) -** -** Notes: -** -** 1) sp, the TIO locator s', is a tiny quantity needed only by the -** most precise applications. It can either be set to zero or -** predicted using the ERFA function eraSp00. -** -** 2) The geographical coordinates are with respect to the ERFA_WGS84 -** reference ellipsoid. TAKE CARE WITH THE LONGITUDE SIGN: the -** longitude required by the present function is east-positive -** (i.e. right-handed), in accordance with geographical convention. -** -** 3) The polar motion xp,yp can be obtained from IERS bulletins. The -** values 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 0 and 90 deg west respectively. For many applications, -** xp and yp can be set to zero. -** -** Internally, the polar motion is stored in a form rotated onto the -** local meridian. -** -** 4) The refraction constants refa and refb are for use in a -** dZ = A*tan(Z)+B*tan^3(Z) model, where Z is the observed -** (i.e. refracted) zenith distance and dZ is the amount of -** refraction. -** -** 5) It is advisable to take great care with units, as even unlikely -** values of the input parameters are accepted and processed in -** accordance with the models used. -** -** 6) In cases where the caller does not wish to provide the Earth -** rotation information and refraction constants, the function -** eraApio13 can be used instead of the present function. This -** starts from UTC and weather readings etc. and computes suitable -** values using other ERFA functions. -** -** 7) This is one of several functions that inserts into the astrom -** structure star-independent parameters needed for the chain of -** astrometric transformations ICRS <-> GCRS <-> CIRS <-> observed. -** -** The various functions support different classes of observer and -** portions of the transformation chain: -** -** functions observer transformation -** -** eraApcg eraApcg13 geocentric ICRS <-> GCRS -** eraApci eraApci13 terrestrial ICRS <-> CIRS -** eraApco eraApco13 terrestrial ICRS <-> observed -** eraApcs eraApcs13 space ICRS <-> GCRS -** eraAper eraAper13 terrestrial update Earth rotation -** eraApio eraApio13 terrestrial CIRS <-> observed -** -** Those with names ending in "13" use contemporary ERFA models to -** compute the various ephemerides. The others accept ephemerides -** supplied by the caller. -** -** The transformation from ICRS to GCRS covers space motion, -** parallax, light deflection, and aberration. From GCRS to CIRS -** comprises frame bias and precession-nutation. From CIRS to -** observed takes account of Earth rotation, polar motion, diurnal -** aberration and parallax (unless subsumed into the ICRS <-> GCRS -** transformation), and atmospheric refraction. -** -** 8) The context structure astrom produced by this function is used by -** eraAtioq and eraAtoiq. -** -** Called: -** eraPvtob position/velocity of terrestrial station -** eraAper astrometry parameters: update ERA -** -** Copyright (C) 2013-2016, NumFOCUS Foundation. -** Derived, with permission, from the SOFA library. See notes at end of file. -*/ -{ - double sl, cl, pv[2][3]; - - -/* Longitude with adjustment for TIO locator s'. */ - astrom->along = elong + sp; - -/* Polar motion, rotated onto the local meridian. */ - sl = sin(astrom->along); - cl = cos(astrom->along); - astrom->xpl = xp*cl - yp*sl; - astrom->ypl = xp*sl + yp*cl; - -/* Functions of latitude. */ - astrom->sphi = sin(phi); - astrom->cphi = cos(phi); - -/* Observer's geocentric position and velocity (m, m/s, CIRS). */ - eraPvtob(elong, phi, hm, xp, yp, sp, theta, pv); - -/* Magnitude of diurnal aberration vector. */ - astrom->diurab = sqrt(pv[1][0]*pv[1][0]+pv[1][1]*pv[1][1]) / ERFA_CMPS; - -/* Refraction constants. */ - astrom->refa = refa; - astrom->refb = refb; - -/* Local Earth rotation angle. */ - eraAper(theta, astrom); - -/* Finished. */ - -} -/*---------------------------------------------------------------------- -** -** -** 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. -** -*/ |