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Diffstat (limited to 'ast/erfa/utcut1.c')
| -rw-r--r-- | ast/erfa/utcut1.c | 156 |
1 files changed, 0 insertions, 156 deletions
diff --git a/ast/erfa/utcut1.c b/ast/erfa/utcut1.c deleted file mode 100644 index 1ab4e94..0000000 --- a/ast/erfa/utcut1.c +++ /dev/null @@ -1,156 +0,0 @@ -#include "erfa.h" - -int eraUtcut1(double utc1, double utc2, double dut1, - double *ut11, double *ut12) -/* -** - - - - - - - - - - -** e r a U t c u t 1 -** - - - - - - - - - - -** -** Time scale transformation: Coordinated Universal Time, UTC, to -** Universal Time, UT1. -** -** Given: -** utc1,utc2 double UTC as a 2-part quasi Julian Date (Notes 1-4) -** dut1 double Delta UT1 = UT1-UTC in seconds (Note 5) -** -** Returned: -** ut11,ut12 double UT1 as a 2-part Julian Date (Note 6) -** -** Returned (function value): -** int status: +1 = dubious year (Note 3) -** 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. -** -** 2) 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. -** -** 3) 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. -** -** 4) The function eraDtf2d converts from calendar date and time of -** day into 2-part Julian Date, and in the case of UTC implements -** the leap-second-ambiguity convention described above. -** -** 5) Delta UT1 can be obtained from tabulations provided by the -** International Earth Rotation and Reference Systems Service. -** It is the caller's responsibility to supply a dut1 argument -** containing the UT1-UTC value that matches the given UTC. -** -** 6) The returned ut11,ut12 are such that their sum is the UT1 Julian -** Date. -** -** References: -** -** McCarthy, D. D., Petit, G. (eds.), IERS Conventions (2003), -** IERS Technical Note No. 32, BKG (2004) -** -** Explanatory Supplement to the Astronomical Almanac, -** P. Kenneth Seidelmann (ed), University Science Books (1992) -** -** Called: -** eraJd2cal JD to Gregorian calendar -** eraDat delta(AT) = TAI-UTC -** eraUtctai UTC to TAI -** eraTaiut1 TAI to UT1 -** -** Copyright (C) 2013-2016, NumFOCUS Foundation. -** Derived, with permission, from the SOFA library. See notes at end of file. -*/ -{ - int iy, im, id, js, jw; - double w, dat, dta, tai1, tai2; - - -/* Look up TAI-UTC. */ - if ( eraJd2cal(utc1, utc2, &iy, &im, &id, &w) ) return -1; - js = eraDat ( iy, im, id, 0.0, &dat); - if ( js < 0 ) return -1; - -/* Form UT1-TAI. */ - dta = dut1 - dat; - -/* UTC to TAI to UT1. */ - jw = eraUtctai(utc1, utc2, &tai1, &tai2); - if ( jw < 0 ) { - return -1; - } else if ( jw > 0 ) { - js = jw; - } - if ( eraTaiut1(tai1, tai2, dta, ut11, ut12) ) return -1; - -/* Status. */ - return js; - -} -/*---------------------------------------------------------------------- -** -** -** 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. -** -*/ |