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Abstract
I/O
Examples
Particulars
Required Reading
Version
Index_Entries

Abstract


   CSPICE_RADREC converts the right ascension, declination 
   coordinates of a location to rectangular (Cartesian) 
   coordinates. All coordinates are expressed as double 
   precision values.

   For important details concerning this module's function, please refer to
   the CSPICE routine radrec_c.

I/O


   Given: 

      range   a double precision scalar or N-vector describing 
              distance of the point from the origin.  Output
              units are the same as the units associated with 'range.'

      ra      a double precision scalar or N-vector describing 
              right ascension of the input point:  the angular
              distance measured toward the east from the prime meridian
              to the meridian containing the input point. The direction
              of increasing right ascension is from the +X axis towards
              the +Y axis.

              The range (i.e., the set of allowed values) of 
              `ra' is unrestricted.  Units are radians.

      dec     a double precision scalar or N-vector describing 
              declination of the point.  This is the angular 
              distance from the XY plane to the point.

              The range of `dec' is unrestricted.  Units are radians.

   the call:

      cspice_radrec, radius, ra, dec, rectan

   returns:

      rectan   a double precision 3-vector or 3xN array containing the
               rectangular coordinates of the position or set of positions.

               'rectan' returns with the same measure of vectorization (N) 
               as 'range', 'ra', and 'dec'.

Examples


   None.

Particulars


   None.

Required Reading


   ICY.REQ

Version


   -Icy Version 1.0.2, 05-FEB-2008, EDW (JPL)

      Edited I/O section, replaced comment
      
         "returns with the same order"
      
      with
      
         "returns with the same measure of vectorization"
      
   -Icy Version 1.0.1, 09-DEC-2005, EDW (JPL)

      Added Examples section.

   -Icy Version 1.0.0, 16-JUN-2003, EDW (JPL)

Index_Entries

 
   range ra and dec to rectangular coordinates 
   right_ascension and declination to rectangular 
 



Wed Apr  5 17:58:03 2017