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47 lines
1.3 KiB
Fortran
47 lines
1.3 KiB
Fortran
DOUBLE PRECISION FUNCTION sla_EPJ2D (EPJ)
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*+
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* - - - - - -
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* E P J 2 D
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* - - - - - -
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*
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* Conversion of Julian Epoch to Modified Julian Date (double precision)
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*
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* Given:
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* EPJ dp Julian Epoch
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*
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* The result is the Modified Julian Date (JD - 2400000.5).
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*
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* Reference:
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* Lieske,J.H., 1979. Astron.Astrophys.,73,282.
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*
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* P.T.Wallace Starlink February 1984
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*
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* Copyright (C) 1995 Rutherford Appleton Laboratory
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*
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* License:
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program (see SLA_CONDITIONS); if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307 USA
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*
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*-
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IMPLICIT NONE
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DOUBLE PRECISION EPJ
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sla_EPJ2D = 51544.5D0 + (EPJ-2000D0)*365.25D0
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END
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