Procedure

   SpiceDouble j1900_c ( void )

Abstract

   Return the Julian Date of 1899 DEC 31 12:00:00 (1900 JAN 0.5).

Required_Reading

   None.

Keywords

   CONSTANTS

Brief_I/O

   The function returns the Julian Date of 1899 DEC 31 12:00:00
   (1900 JAN 0.5).

Detailed_Input

   None.

Detailed_Output

   The function returns 2415020.0, the Julian Date corresponding
   to 1899 DEC 31 12:00:00 (1900 JAN 0.5).

Parameters

   None.

Exceptions

   Error free.

Files

   None.

Particulars

   The function always returns the constant value shown above.

Examples

   The following code fragment illustrates the use of j1900_c.

            /.
            Convert Julian Date to UTC seconds past the reference
            epoch (J1900).
            ./

            spref = ( jd - j1900_c() ) * spd_c();

Restrictions

   None.

Literature_References

   None.

Author_and_Institution

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

Version

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

Index_Entries

   julian date of 1900.0 jan 0.5

Link to routine j1900_c source file j1900_c.c