Repatch (from linux) of OSX IRAF

1 files changed, 73 insertions, 0 deletions

diff --git a/math/slalib/eqecl.f b/math/slalib/eqecl.f
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+      SUBROUTINE slEQEC (DR, DD, DATE, DL, DB)
+*+
+*     - - - - - -
+*      E Q E C
+*     - - - - - -
+*
+*  Transformation from J2000.0 equatorial coordinates to
+*  ecliptic coordinates (double precision)
+*
+*  Given:
+*     DR,DD       dp      J2000.0 mean RA,Dec (radians)
+*     DATE        dp      TDB (loosely ET) as Modified Julian Date
+*                                              (JD-2400000.5)
+*  Returned:
+*     DL,DB       dp      ecliptic longitude and latitude
+*                         (mean of date, IAU 1980 theory, radians)
+*
+*  Called:
+*     slDS2C, slPREC, slEPJ, slDMXV, slECMA, slDC2S,
+*     slDA2P, slDA1P
+*
+*  P.T.Wallace   Starlink   March 1986
+*
+*  Copyright (C) 1995 Rutherford Appleton Laboratory
+*
+*  License:
+*    This program is free software; you can redistribute it and/or modify
+*    it under the terms of the GNU General Public License as published by
+*    the Free Software Foundation; either version 2 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 General Public License for more details.
+*
+*    You should have received a copy of the GNU General Public License
+*    along with this program (see SLA_CONDITIONS); if not, write to the
+*    Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+*    Boston, MA  02110-1301  USA
+*
+*  Copyright (C) 1995 Association of Universities for Research in Astronomy Inc.
+*-
+
+      IMPLICIT NONE
+
+      DOUBLE PRECISION DR,DD,DATE,DL,DB
+
+      DOUBLE PRECISION slEPJ,slDA2P,slDA1P
+
+      DOUBLE PRECISION RMAT(3,3),V1(3),V2(3)
+
+
+
+*  Spherical to Cartesian
+      CALL slDS2C(DR,DD,V1)
+
+*  Mean J2000 to mean of date
+      CALL slPREC(2000D0,slEPJ(DATE),RMAT)
+      CALL slDMXV(RMAT,V1,V2)
+
+*  Equatorial to ecliptic
+      CALL slECMA(DATE,RMAT)
+      CALL slDMXV(RMAT,V2,V1)
+
+*  Cartesian to spherical
+      CALL slDC2S(V1,DL,DB)
+
+*  Express in conventional ranges
+      DL=slDA2P(DL)
+      DB=slDA1P(DB)
+
+      END