planets.h

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#ifndef EPHEM_H
#define EPHEM_H

#define  MERCURY        0
#define  VENUS          1
#define  MARS           2
#define  JUPITER        3
#define  SATURN         4
#define  URANUS         5
#define  NEPTUNE        6
#define  MOON           7
#define  MAX_PLANETS    8

#define   H          6.626e-34          /* Planck's constant */
#define   K          1.381e-23          /* Boltzmann's constant */
#define   C          0.299792458        /* speed of light (m/ns) */
#define   LN2        0.693147181        /* ln(2.0) */
#define   CMB        2.725              /* Cosmic Microwave Bkgd */
#define   R0         1.524              /* Mars mean heliocentric distance */
#define   T_R0       206.8              /* Mars temp at R0 */
#define   P          29.530589          /* Period of Moon */


#define MAX_VENUS_ENTRIES    170
#define MAX_MARS_ENTRIES      16
#define MAX_JUPITER_ENTRIES 4750
#define MAX_URANUS_ENTRIES   270
#define MAX_NEPTUNE_ENTRIES  800
#define MAX_VESTA_ENTRIES     64

struct TBRIGHT {
        float freq;
        float tb;
};


struct EPH_TIME {
        int year;
        int mon;
        int day;
        int hour;
        int min;
        int pad;
};


struct EPH_STATE {
        double f_sky;      // sky frequency (GHz)
        double rej;        // rejection (dB)
        double T_ant;      // antenna temperature TA* (K)
        double ta_s;       // antenna temperature std dev (+/-)
        double eta_mb;     // main-beam efficiency    
        double err;        // main-beam efficiency uncertainty
        double lambda;    
        double theta_mb;   // Telescope main beam FWHM
};



struct EPH_OBJECT {
        char   name[80];
        char   dbase[32];  /* Database source */
        double ra;         /* Right Accension */
        double dec;        /* Declination */
        double illum;      /* % of illumination as seen from Earth */
        double dmajor;     /* Arcsec of diameter */
        double dminor;     /* Arcsec of diameter */
        double sdist;      /* AU from Sun */
        double rdot;       /* ??? */
        double dist;       /* Object distance from Earth */
        double vel;        /* Object Velocity reletive to Earth */
        double sangle;     /* Angle between Sun and Object */
        double tsrc;       // Source temperature (K)
        double trj;        // planet diameter (arcsec)
        double flux;       // planet flux
        double flux2;      // planet flux, different method
        double tmb;        // Temperature in the main beam
        double csize;      // Planet convoled size with beam
        double frac;       // Fractional time between lines of Ephem tables
};


struct NEW_EPHEM {
        int               planet;
        struct EPH_STATE  state;
        struct EPH_TIME   time;
        struct EPH_OBJECT planets[MAX_PLANETS];
};


#endif