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erfasrc/src/pvu.c  view on Meta::CPAN

#include "erfa.h"

void eraPvu(double dt, double pv[2][3], double upv[2][3])
/*
**  - - - - - - -
**   e r a P v u
**  - - - - - - -
**
**  Update a pv-vector.
**
**  Given:
**     dt       double           time interval
**     pv       double[2][3]     pv-vector
**
**  Returned:
**     upv      double[2][3]     p updated, v unchanged
**
**  Notes:
**
**  1) "Update" means "refer the position component of the vector
**     to a new date dt time units from the existing date".
**
**  2) The time units of dt must match those of the velocity.
**
**  3) It is permissible for pv and upv to be the same array.
**
**  Called:
**     eraPpsp      p-vector plus scaled p-vector
**     eraCp        copy p-vector
**
**  Copyright (C) 2013-2020, NumFOCUS Foundation.
**  Derived, with permission, from the SOFA library.  See notes at end of file.
*/
{
   eraPpsp(pv[0], dt, pv[1], upv[0]);
   eraCp(pv[1], upv[1]);

   return;

}
/*----------------------------------------------------------------------
**  
**  
**  Copyright (C) 2013-2020, 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.
**  
**  
**  TERMS AND CONDITIONS
**  
**  Redistribution and use in source and binary forms, with or without
**  modification, are permitted provided that the following conditions
**  are met:
**  
**  1 Redistributions of source code must retain the above copyright