epb2jd.c

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#include "erfa.h"

void eraEpb2jd(double epb, double *djm0, double *djm)
/*
**  - - - - - - - - - -
**   e r a E p b 2 j d
**  - - - - - - - - - -
**
**  Besselian Epoch to Julian Date.
**
**  Given:
**     epb      double    Besselian Epoch (e.g. 1957.3)
**
**  Returned:
**     djm0     double    MJD zero-point: always 2400000.5
**     djm      double    Modified Julian Date
**
**  Note:
**
**     The Julian Date is returned in two pieces, in the usual ERFA
**     manner, which is designed to preserve time resolution.  The
**     Julian Date is available as a single number by adding djm0 and
**     djm.
**
**  Reference:
**
**     Lieske, J.H., 1979, Astron.Astrophys. 73, 282.
**
**  Copyright (C) 2013-2015, NumFOCUS Foundation.
**  Derived, with permission, from the SOFA library.  See notes at end of file.
*/
{
   *djm0 = ERFA_DJM0;
   *djm  =   15019.81352 + (epb - 1900.0) * ERFA_DTY;

   return;

}
/*----------------------------------------------------------------------
**  
**  
**  Copyright (C) 2013-2015, 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.
**  
**  
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