diff options
Diffstat (limited to 'ast/erfa/gst06a.c')
| -rw-r--r-- | ast/erfa/gst06a.c | 140 |
1 files changed, 0 insertions, 140 deletions
diff --git a/ast/erfa/gst06a.c b/ast/erfa/gst06a.c deleted file mode 100644 index e80fd83..0000000 --- a/ast/erfa/gst06a.c +++ /dev/null @@ -1,140 +0,0 @@ -#include "erfa.h" - -double eraGst06a(double uta, double utb, double tta, double ttb) -/* -** - - - - - - - - - - -** e r a G s t 0 6 a -** - - - - - - - - - - -** -** Greenwich apparent sidereal time (consistent with IAU 2000 and 2006 -** resolutions). -** -** Given: -** uta,utb double UT1 as a 2-part Julian Date (Notes 1,2) -** tta,ttb double TT as a 2-part Julian Date (Notes 1,2) -** -** Returned (function value): -** double Greenwich apparent sidereal time (radians) -** -** Notes: -** -** 1) The UT1 and TT dates uta+utb and tta+ttb respectively, are both -** Julian Dates, apportioned in any convenient way between the -** argument pairs. For example, JD=2450123.7 could be expressed in -** any of these ways, among others: -** -** Part A Part B -** -** 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 (in the case of UT; the TT is not at all critical -** in this respect). 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) Both UT1 and TT are required, UT1 to predict the Earth rotation -** and TT to predict the effects of precession-nutation. If UT1 is -** used for both purposes, errors of order 100 microarcseconds -** result. -** -** 3) This GAST is compatible with the IAU 2000/2006 resolutions and -** must be used only in conjunction with IAU 2006 precession and -** IAU 2000A nutation. -** -** 4) The result is returned in the range 0 to 2pi. -** -** Called: -** eraPnm06a classical NPB matrix, IAU 2006/2000A -** eraGst06 Greenwich apparent ST, IAU 2006, given NPB matrix -** -** Reference: -** -** Wallace, P.T. & Capitaine, N., 2006, Astron.Astrophys. 459, 981 -** -** Copyright (C) 2013-2016, NumFOCUS Foundation. -** Derived, with permission, from the SOFA library. See notes at end of file. -*/ -{ - double rnpb[3][3], gst; - - -/* Classical nutation x precession x bias matrix, IAU 2000A. */ - eraPnm06a(tta, ttb, rnpb); - -/* Greenwich apparent sidereal time. */ - gst = eraGst06(uta, utb, tta, ttb, rnpb); - - 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. -** -*/ |