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Diffstat (limited to 'ast/pal/palEqgal.c')
-rw-r--r-- | ast/pal/palEqgal.c | 118 |
1 files changed, 0 insertions, 118 deletions
diff --git a/ast/pal/palEqgal.c b/ast/pal/palEqgal.c deleted file mode 100644 index 9df3d09..0000000 --- a/ast/pal/palEqgal.c +++ /dev/null @@ -1,118 +0,0 @@ -/* -*+ -* Name: -* palEqgal - -* Purpose: -* Convert from J2000.0 equatorial coordinates to Galactic - -* Language: -* Starlink ANSI C - -* Type of Module: -* Library routine - -* Invocation: -* void palEqgal ( double dr, double dd, double *dl, double *db ); - -* Arguments: -* dr = double (Given) -* J2000.0 RA (radians) -* dd = double (Given) -* J2000.0 Dec (radians -* dl = double * (Returned) -* Galactic longitude (radians). -* db = double * (Returned) -* Galactic latitude (radians). - -* Description: -* Transformation from J2000.0 equatorial coordinates -* to IAU 1958 galactic coordinates. - -* Authors: -* PTW: Pat Wallace (STFC) -* TIMJ: Tim Jenness (JAC, Hawaii) -* {enter_new_authors_here} - -* Notes: -* The equatorial coordinates are J2000.0. Use the routine -* palGe50 if conversion to B1950.0 'FK4' coordinates is -* required. - -* See Also: -* Blaauw et al, Mon.Not.R.Astron.Soc.,121,123 (1960) - -* History: -* 2012-02-12(TIMJ): -* Initial version with documentation taken from Fortran SLA -* Adapted with permission from the Fortran SLALIB library. -* {enter_further_changes_here} - -* Copyright: -* Copyright (C) 1998 Rutherford Appleton Laboratory -* Copyright (C) 2012 Science and Technology Facilities Council. -* All Rights Reserved. - -* Licence: -* This program is free software: you can redistribute it and/or -* modify it under the terms of the GNU Lesser General Public -* License as published by the Free Software Foundation, either -* version 3 of the License, or (at your option) any later -* version. -* -* This program is distributed in the hope that it will be useful, -* but WITHOUT ANY WARRANTY; without even the implied warranty of -* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -* GNU Lesser General Public License for more details. -* -* You should have received a copy of the GNU Lesser General -* License along with this program. If not, see -* <http://www.gnu.org/licenses/>. - -* Bugs: -* {note_any_bugs_here} -*- -*/ - -#include "pal.h" -#include "pal1sofa.h" - -void palEqgal ( double dr, double dd, double *dl, double *db ) { - - double v1[3]; - double v2[3]; - -/* -* L2,B2 system of galactic coordinates -* -* P = 192.25 RA of galactic north pole (mean B1950.0) -* Q = 62.6 inclination of galactic to mean B1950.0 equator -* R = 33 longitude of ascending node -* -* P,Q,R are degrees -* -* Equatorial to galactic rotation matrix (J2000.0), obtained by -* applying the standard FK4 to FK5 transformation, for zero proper -* motion in FK5, to the columns of the B1950 equatorial to -* galactic rotation matrix: -*/ - double rmat[3][3] = { - { -0.054875539726,-0.873437108010,-0.483834985808 }, - { +0.494109453312,-0.444829589425,+0.746982251810 }, - { -0.867666135858,-0.198076386122,+0.455983795705 } - }; - - /* Spherical to Cartesian */ - eraS2c( dr, dd, v1 ); - - /* Equatorial to Galactic */ - eraRxp( rmat, v1, v2 ); - - /* Cartesian to spherical */ - eraC2s( v2, dl, db ); - - /* Express in conventional ranges */ - *dl = eraAnp( *dl ); - *db = eraAnpm( *db ); - -} |