Abstract

   CSPICE_DPR returns the double precision value of the constant 180/PI
   which represents the number of degrees of arc per radian.

I/O

   The call:

      dpr = cspice_dpr(  )

   returns:

      dpr      the number of degrees per radian: 180/pi.

               help, dpr
                  DOUBLE = Scalar

               The value of pi is determined by the acos function. That
               is,

                  dpr = 180.0 / acos ( -1.0 )

Parameters

   None.

Examples

   Any numerical results shown for this example may differ between
   platforms as the results depend on the SPICE kernels used as input
   and the machine specific arithmetic implementation.

   1) Compute the number of degrees of arc per radian.

      Example code begins here.


      PRO dpr_ex1

         print, FORMAT='("Degrees per radian: ",F10.7)', cspice_dpr()

      END


      When this program was executed on a Mac/Intel/IDL8.x/64-bit
      platform, the output was:


      Degrees per radian: 57.2957795


      Note, the IDL system variable !RADEG returns a single precision
      (float) value for 180/PI that equates to the value returned by
      the expression float( cspice_dpr() ).

Particulars

   The first time the function is referenced, the value is computed
   as shown above. The value is saved, and returned directly upon
   subsequent reference.

Exceptions

   Error free.

Files

   None.

Restrictions

   None.

Required_Reading

   ICY.REQ

Literature_References

   None.

Author_and_Institution

   J. Diaz del Rio     (ODC Space)
   E.D. Wright         (JPL)

Version

   -Icy Version 1.0.1, 25-AUG-2021 (JDR)

       Edited the header to comply with NAIF standard. Added example's
       problem statement and reformatted example's output.

       Added -Parameters, -Particulars, -Exceptions, -Files, -Restrictions,
       -Literature_References and -Author_and_Institution sections.

       Removed reference to the routine's corresponding CSPICE header from
       -Abstract section.

       Added argument's type and size information in the -I/O section.

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

Index_Entries

   degrees per radian