loon: novascon.h Source File

00001 /*
00002    NOVAS-C Version 2.0 (1 Nov 98)
00003    Header file for novascon.c
00004 
00005    Naval Observatory Vector Astrometry Subroutines
00006    C Version
00007 
00008    U. S. Naval Observatory
00009    Astronomical Applications Dept.
00010    3450 Massachusetts Ave., NW
00011    Washington, DC  20392-5420
00012 */
00013 
00014 #ifndef _CONSTS_
00015    #define _CONSTS_
00016 
00017    extern const short int FN1;
00018    extern const short int FN0;
00019 
00020 /*
00021    TDB Julian date of epoch J2000.0.
00022 */
00023 
00024    extern const double T0;
00025 
00026 /*
00027    Astronomical Unit in kilometers.
00028 */
00029 
00030    extern const double KMAU;
00031 
00032 /*
00033    Astronomical Unit in meters.
00034 */
00035 
00036    extern const double MAU;
00037 
00038 /*
00039    Speed of light in AU/Day.
00040 */
00041 
00042    extern const double C;
00043 
00044 /*
00045    Heliocentric gravitational constant.
00046 */
00047 
00048    extern const double GS;
00049 
00050 /*
00051    Radius of Earth in kilometers.
00052 */
00053 
00054    extern const double EARTHRAD;
00055 
00056 /*
00057    'f' = Earth ellipsoid flattening
00058 */
00059 
00060    extern const double F;
00061 
00062 /*
00063    'omega' = rotational angular velocity of Earth in radians/sec
00064 */
00065 
00066    extern const double OMEGA;
00067 
00068 /*
00069    Value of 2.0 * pi in radians.
00070 */
00071 
00072    extern const double TWOPI;
00073 
00074 /*
00075    Angle conversion constants.
00076 */
00077 
00078    extern const double RAD2SEC;
00079    extern const double DEG2RAD;
00080    extern const double RAD2DEG;
00081 
00082 #endif