Procedure

   SpiceDouble rpd_c ( void )

Abstract

 
   Return the number of radians per degree.

Required_Reading

   None.

Keywords

 
 
   CONSTANTS 

Brief_I/O

 
   The function returns the number of radians per degree. 
 

Detailed_Input

 
 
   None. 
 

Detailed_Output

 

   The function returns the number of radians per degree: pi/180.
   The value of pi is determined by the ACOS function. That is,

      rpd = acos ( -1. ) / 180.

Parameters

 
 
   None. 

Exceptions

 
 
   Error free. 
 

Files

 
 
   None. 
 

Particulars

 
 
   When the function is referenced, the value computed as shown 
   above is returned.
 

Examples

 
   The code fragment below illustrates the use of rpd_c.
 
      /. Convert all angles to radians for output  ./

         clock *= rpd_c() 
         cone  *= rpd_c() 
         twist *= rpd_c()  

Restrictions

   None.

Literature_References

   None.

Author_and_Institution

   W.L. Taber      (JPL) 
   I.M. Underwood  (JPL) 
   E.D. Wright     (JPL)

Version

   -CSPICE Version 1.0.0, 08-FEB-1998 (EDW)

Index_Entries

   radians per degree

Link to routine rpd_c source file rpd_c.c