novascon.h

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/*
   NOVAS-C Version 2.0 (1 Nov 98)
   Header file for novascon.c
 
   Naval Observatory Vector Astrometry Subroutines
   C Version
 
   U. S. Naval Observatory
   Astronomical Applications Dept.
   3450 Massachusetts Ave., NW
   Washington, DC  20392-5420
*/
 
#ifndef _CONSTS_
   #define _CONSTS_
 
   extern const short int FN1;
   extern const short int FN0;
 
/*
   TDB Julian date of epoch J2000.0.
*/
 
   extern const double T0;
 
/*
   Astronomical Unit in kilometers.
*/
 
   extern const double KMAU;
 
/*
   Astronomical Unit in meters.
*/
 
   extern const double MAU;
 
/*
   Speed of light in AU/Day.
*/
 
   extern const double C;
 
/*
   Heliocentric gravitational constant.
*/
 
   extern const double GS;
 
/*
   Radius of Earth in kilometers.
*/
 
   extern const double EARTHRAD;
 
/*
   'f' = Earth ellipsoid flattening
*/
 
   extern const double F;
 
/*
   'omega' = rotational angular velocity of Earth in radians/sec
*/
 
   extern const double OMEGA;
 
/*
   Value of 2.0 * pi in radians.
*/
 
   extern const double TWOPI;
 
/*
   Angle conversion constants.
*/
 
   extern const double RAD2SEC;
   extern const double DEG2RAD;
   extern const double RAD2DEG;
 
#endif