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Diffstat (limited to 'ast/erfa/atci13.c')
| -rw-r--r-- | ast/erfa/atci13.c | 159 |
1 files changed, 0 insertions, 159 deletions
diff --git a/ast/erfa/atci13.c b/ast/erfa/atci13.c deleted file mode 100644 index 40a3a04..0000000 --- a/ast/erfa/atci13.c +++ /dev/null @@ -1,159 +0,0 @@ -#include "erfa.h" - -void eraAtci13(double rc, double dc, - double pr, double pd, double px, double rv, - double date1, double date2, - double *ri, double *di, double *eo) -/* -** - - - - - - - - - - -** e r a A t c i 1 3 -** - - - - - - - - - - -** -** Transform ICRS star data, epoch J2000.0, to CIRS. -** -** Given: -** rc double ICRS right ascension at J2000.0 (radians, Note 1) -** dc double ICRS declination at J2000.0 (radians, Note 1) -** pr double RA proper motion (radians/year; Note 2) -** pd double Dec proper motion (radians/year) -** px double parallax (arcsec) -** rv double radial velocity (km/s, +ve if receding) -** date1 double TDB as a 2-part... -** date2 double ...Julian Date (Note 3) -** -** Returned: -** ri,di double* CIRS geocentric RA,Dec (radians) -** eo double* equation of the origins (ERA-GST, Note 5) -** -** Notes: -** -** 1) Star data for an epoch other than J2000.0 (for example from the -** Hipparcos catalog, which has an epoch of J1991.25) will require a -** preliminary call to eraPmsafe before use. -** -** 2) The proper motion in RA is dRA/dt rather than cos(Dec)*dRA/dt. -** -** 3) The TDB date date1+date2 is a Julian Date, apportioned in any -** convenient way between the two arguments. For example, -** JD(TDB)=2450123.8g could be expressed in any of these ways, among -** others: -** -** date1 date2 -** -** 2450123.8g 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. For most -** applications of this function the choice will not be at all -** critical. -** -** TT can be used instead of TDB without any significant impact on -** accuracy. -** -** 4) The available accuracy is better than 1 milliarcsecond, limited -** mainly by the precession-nutation model that is used, namely -** IAU 2000A/2006. Very close to solar system bodies, additional -** errors of up to several milliarcseconds can occur because of -** unmodeled light deflection; however, the Sun's contribution is -** taken into account, to first order. The accuracy limitations of -** the ERFA function eraEpv00 (used to compute Earth position and -** velocity) can contribute aberration errors of up to -** 5 microarcseconds. Light deflection at the Sun's limb is -** uncertain at the 0.4 mas level. -** -** 5) Should the transformation to (equinox based) apparent place be -** required rather than (CIO based) intermediate place, subtract the -** equation of the origins from the returned right ascension: -** RA = RI - EO. (The eraAnp function can then be applied, as -** required, to keep the result in the conventional 0-2pi range.) -** -** Called: -** eraApci13 astrometry parameters, ICRS-CIRS, 2013 -** eraAtciq quick ICRS to CIRS -** -** Copyright (C) 2013-2016, NumFOCUS Foundation. -** Derived, with permission, from the SOFA library. See notes at end of file. -*/ -{ -/* Star-independent astrometry parameters */ - eraASTROM astrom; - - -/* The transformation parameters. */ - eraApci13(date1, date2, &astrom, eo); - -/* ICRS (epoch J2000.0) to CIRS. */ - eraAtciq(rc, dc, pr, pd, px, rv, &astrom, ri, di); - -/* 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. -** -*/ |