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Diffstat (limited to 'ast/erfa/atio13.c')
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diff --git a/ast/erfa/atio13.c b/ast/erfa/atio13.c deleted file mode 100644 index 6201776..0000000 --- a/ast/erfa/atio13.c +++ /dev/null @@ -1,222 +0,0 @@ -#include "erfa.h" - -int eraAtio13(double ri, double di, - double utc1, double utc2, double dut1, - double elong, double phi, double hm, double xp, double yp, - double phpa, double tc, double rh, double wl, - double *aob, double *zob, double *hob, - double *dob, double *rob) -/* -** - - - - - - - - - - -** e r a A t i o 1 3 -** - - - - - - - - - - -** -** CIRS RA,Dec to observed place. The caller supplies UTC, site -** coordinates, ambient air conditions and observing wavelength. -** -** Given: -** ri double CIRS right ascension (CIO-based, radians) -** di double CIRS declination (radians) -** utc1 double UTC as a 2-part... -** utc2 double ...quasi Julian Date (Notes 1,2) -** dut1 double UT1-UTC (seconds, Note 3) -** elong double longitude (radians, east +ve, Note 4) -** phi double geodetic latitude (radians, Note 4) -** hm double height above ellipsoid (m, geodetic Notes 4,6) -** xp,yp double polar motion coordinates (radians, Note 5) -** phpa double pressure at the observer (hPa = mB, Note 6) -** tc double ambient temperature at the observer (deg C) -** rh double relative humidity at the observer (range 0-1) -** wl double wavelength (micrometers, Note 7) -** -** Returned: -** aob double* observed azimuth (radians: N=0,E=90) -** zob double* observed zenith distance (radians) -** hob double* observed hour angle (radians) -** dob double* observed declination (radians) -** rob double* observed right ascension (CIO-based, radians) -** -** Returned (function value): -** int status: +1 = dubious year (Note 2) -** 0 = OK -** -1 = unacceptable date -** -** Notes: -** -** 1) utc1+utc2 is quasi Julian Date (see Note 2), apportioned in any -** convenient way between the two arguments, for example where utc1 -** is the Julian Day Number and utc2 is the fraction of a day. -** -** However, JD cannot unambiguously represent UTC during a leap -** second unless special measures are taken. The convention in the -** present function is that the JD day represents UTC days whether -** the length is 86399, 86400 or 86401 SI seconds. -** -** Applications should use the function eraDtf2d to convert from -** calendar date and time of day into 2-part quasi Julian Date, as -** it implements the leap-second-ambiguity convention just -** described. -** -** 2) The warning status "dubious year" flags UTCs that predate the -** introduction of the time scale or that are too far in the -** future to be trusted. See eraDat for further details. -** -** 3) UT1-UTC is tabulated in IERS bulletins. It increases by exactly -** one second at the end of each positive UTC leap second, -** introduced in order to keep UT1-UTC within +/- 0.9s. n.b. This -** practice is under review, and in the future UT1-UTC may grow -** essentially without limit. -** -** 4) 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. -** -** 5) 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. -** -** 6) If hm, the height above the ellipsoid of the observing station -** in meters, is not known but phpa, the pressure in hPa (=mB), is -** available, an adequate estimate of hm can be obtained from the -** expression -** -** hm = -29.3 * tsl * log ( phpa / 1013.25 ); -** -** where tsl is the approximate sea-level air temperature in K -** (See Astrophysical Quantities, C.W.Allen, 3rd edition, section -** 52). Similarly, if the pressure phpa is not known, it can be -** estimated from the height of the observing station, hm, as -** follows: -** -** phpa = 1013.25 * exp ( -hm / ( 29.3 * tsl ) ); -** -** Note, however, that the refraction is nearly proportional to -** the pressure and that an accurate phpa value is important for -** precise work. -** -** 7) The argument wl specifies the observing wavelength in -** micrometers. The transition from optical to radio is assumed to -** occur at 100 micrometers (about 3000 GHz). -** -** 8) "Observed" Az,ZD means the position that would be seen by a -** perfect geodetically aligned theodolite. (Zenith distance is -** used rather than altitude in order to reflect the fact that no -** allowance is made for depression of the horizon.) This is -** related to the observed HA,Dec via the standard rotation, using -** the geodetic latitude (corrected for polar motion), while the -** observed HA and RA are related simply through the Earth rotation -** angle and the site longitude. "Observed" RA,Dec or HA,Dec thus -** means the position that would be seen by a perfect equatorial -** with its polar axis aligned to the Earth's axis of rotation. -** -** 9) The accuracy of the result is limited by the corrections for -** refraction, which use a simple A*tan(z) + B*tan^3(z) model. -** Providing the meteorological parameters are known accurately and -** there are no gross local effects, the predicted astrometric -** coordinates should be within 0.05 arcsec (optical) or 1 arcsec -** (radio) for a zenith distance of less than 70 degrees, better -** than 30 arcsec (optical or radio) at 85 degrees and better -** than 20 arcmin (optical) or 30 arcmin (radio) at the horizon. -** -** 10) The complementary functions eraAtio13 and eraAtoi13 are self- -** consistent to better than 1 microarcsecond all over the -** celestial sphere. -** -** 11) 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. -** -** Called: -** eraApio13 astrometry parameters, CIRS-observed, 2013 -** eraAtioq quick CIRS to observed -** -** Copyright (C) 2013-2016, NumFOCUS Foundation. -** Derived, with permission, from the SOFA library. See notes at end of file. -*/ -{ - int j; - eraASTROM astrom; - - -/* Star-independent astrometry parameters for CIRS->observed. */ - j = eraApio13(utc1, utc2, dut1, elong, phi, hm, xp, yp, - phpa, tc, rh, wl, &astrom); - -/* Abort if bad UTC. */ - if ( j < 0 ) return j; - -/* Transform CIRS to observed. */ - eraAtioq(ri, di, &astrom, aob, zob, hob, dob, rob); - -/* Return OK/warning status. */ - return j; - -/* 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. -** -*/ |