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Diffstat (limited to 'ast/erfa/gst94.c')
| -rw-r--r-- | ast/erfa/gst94.c | 140 |
1 files changed, 0 insertions, 140 deletions
diff --git a/ast/erfa/gst94.c b/ast/erfa/gst94.c deleted file mode 100644 index 112cf61..0000000 --- a/ast/erfa/gst94.c +++ /dev/null @@ -1,140 +0,0 @@ -#include "erfa.h" - -double eraGst94(double uta, double utb) -/* -** - - - - - - - - - -** e r a G s t 9 4 -** - - - - - - - - - -** -** Greenwich apparent sidereal time (consistent with IAU 1982/94 -** resolutions). -** -** Given: -** uta,utb double UT1 as a 2-part Julian Date (Notes 1,2) -** -** Returned (function value): -** double Greenwich apparent sidereal time (radians) -** -** Notes: -** -** 1) The UT1 date uta+utb is a Julian Date, apportioned in any -** convenient way between the argument pair. For example, -** JD=2450123.7 could be expressed in any of these ways, among -** others: -** -** uta utb -** -** 2450123.7 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 and MJD methods are good compromises -** between resolution and convenience. For UT, the date & time -** method is best matched to the algorithm that is used by the Earth -** Rotation Angle function, called internally: maximum precision is -** delivered when the uta argument is for 0hrs UT1 on the day in -** question and the utb argument lies in the range 0 to 1, or vice -** versa. -** -** 2) The result is compatible with the IAU 1982 and 1994 resolutions, -** except that accuracy has been compromised for the sake of -** convenience in that UT is used instead of TDB (or TT) to compute -** the equation of the equinoxes. -** -** 3) This GAST must be used only in conjunction with contemporaneous -** IAU standards such as 1976 precession, 1980 obliquity and 1982 -** nutation. It is not compatible with the IAU 2000 resolutions. -** -** 4) The result is returned in the range 0 to 2pi. -** -** Called: -** eraGmst82 Greenwich mean sidereal time, IAU 1982 -** eraEqeq94 equation of the equinoxes, IAU 1994 -** eraAnp normalize angle into range 0 to 2pi -** -** References: -** -** Explanatory Supplement to the Astronomical Almanac, -** P. Kenneth Seidelmann (ed), University Science Books (1992) -** -** IAU Resolution C7, Recommendation 3 (1994) -** -** Copyright (C) 2013-2016, NumFOCUS Foundation. -** Derived, with permission, from the SOFA library. See notes at end of file. -*/ -{ - double gmst82, eqeq94, gst; - - - gmst82 = eraGmst82(uta, utb); - eqeq94 = eraEqeq94(uta, utb); - gst = eraAnp(gmst82 + eqeq94); - - return gst; - -} -/*---------------------------------------------------------------------- -** -** -** 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. -** -*/ |