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Diffstat (limited to 'ast/pal/palRvgalc.c')
-rw-r--r-- | ast/pal/palRvgalc.c | 111 |
1 files changed, 0 insertions, 111 deletions
diff --git a/ast/pal/palRvgalc.c b/ast/pal/palRvgalc.c deleted file mode 100644 index 2f01576..0000000 --- a/ast/pal/palRvgalc.c +++ /dev/null @@ -1,111 +0,0 @@ -/* -*+ -* Name: -* palRvgalc - -* Purpose: -* Velocity component in a given direction due to the rotation -* of the Galaxy. - -* Language: -* Starlink ANSI C - -* Type of Module: -* Library routine - -* Invocation: -* double palRvgalc( double r2000, double d2000 ) - -* Arguments: -* r2000 = double (Given) -* J2000.0 mean RA (radians) -* d2000 = double (Given) -* J2000.0 mean Dec (radians) - -* Returned Value: -* Component of dynamical LSR motion in direction R2000,D2000 (km/s). - -* Description: -* This function returns the Component of dynamical LSR motion in -* the direction of R2000,D2000. The result is +ve when the dynamical -* LSR is receding from the given point on the sky. -* -* Notes: -* - The Local Standard of Rest used here is a point in the -* vicinity of the Sun which is in a circular orbit around -* the Galactic centre. Sometimes called the "dynamical" LSR, -* it is not to be confused with a "kinematical" LSR, which -* is the mean standard of rest of star catalogues or stellar -* populations. -* -* Reference: -* - The orbital speed of 220 km/s used here comes from Kerr & -* Lynden-Bell (1986), MNRAS, 221, p1023. - -* Authors: -* PTW: Pat Wallace (STFC) -* DSB: David Berry (JAC, Hawaii) -* {enter_new_authors_here} - -* History: -* 2012-02-16 (DSB): -* Initial version. -* Adapted with permission from the Fortran SLALIB library. -* {enter_further_changes_here} - -* Copyright: -* Copyright (C) 1995 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" - -double palRvgalc( double r2000, double d2000 ){ - -/* Local Variables: */ - double vb[ 3 ]; - -/* -* LSR velocity due to Galactic rotation -* -* Speed = 220 km/s -* Apex = L2,B2 90deg, 0deg -* = RA,Dec 21 12 01.1 +48 19 47 J2000.0 -* -* This is expressed in the form of a J2000.0 x,y,z vector: -* -* VA(1) = X = -SPEED*COS(RA)*COS(DEC) -* VA(2) = Y = -SPEED*SIN(RA)*COS(DEC) -* VA(3) = Z = -SPEED*SIN(DEC) -*/ - - double va[ 3 ] = { -108.70408, +97.86251, -164.33610 }; - -/* Convert given J2000 RA,Dec to x,y,z. */ - eraS2c( r2000, d2000, vb ); - -/* Compute dot product with LSR motion vector. */ - return eraPdp( va, vb ); -} |