Programming interface to the Swiss Ephemeris - programmiastral.com

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Swiss Ephemeris 34 Compute the attributes of a lunar eclipse at a given time int32 swe_lun_eclipse_how( double tjd_ut, /* time, Jul. day UT */ int32 ifl, /* ephemeris flag */ double *geopos, /* input array, geopos, geolon, geoheight */ eastern longitude is positive, western longitude is negative, northern latitude is positive, southern latitude is negative */ double *attr, /* return array, 20 doubles, see below */ char *serr); /* return error string */ int32 swe_rise_trans( double tjd_ut, /* search after this time (UT) */ int32 ipl, /* planet number, if planet or moon */ char *starname, /* star name, if star */ int32 epheflag, /* ephemeris flag */ int32 rsmi, /* integer specifying that rise, set, or one of the two meridian transits is wanted. see definition below */ double *geopos, /* array of three doubles containing geograph. long., lat., height of observer */ double atpress, /* atmospheric pressure in mbar/hPa */ double attemp, /* atmospheric temperature in deg. C */ double *tret, /* return address (double) for rise time etc. */ char *serr); /* return address for error message */ Compute planetary phenomena int32 swe_pheno_ut( double tjd_ut, /* time Jul. Day UT */ int32 ipl, /* planet number */ int32 iflag, /* ephemeris flag */ double *attr, /* return array, 20 doubles, see below */ char *serr); /* return error string */ int32 swe_pheno( double tjd_et, /* time Jul. Day ET */ int32 ipl, /* planet number */ int32 iflag, /* ephemeris flag */ double *attr, /* return array, 20 doubles, see below */ char *serr); /* return error string */ void swe_azalt( double tjd_ut, /* UT */ int32 calc_flag, /* SE_ECL2HOR or SE_EQU2HOR */ double *geopos, /* array of 3 doubles: geogr. long., lat., height */ double atpress, /* atmospheric pressure in mbar (hPa) */ double attemp, /* atmospheric temperature in degrees Celsius */ double *xin, /* array of 3 doubles: position of body in either ecliptical or equatorial coordinates, depending on calc_flag */ double *xaz); /* return array of 3 doubles, containing azimuth, true altitude, apparent altitude */ void swe_azalt_rev( double tjd_ut, int32 calc_flag, /* either SE_HOR2ECL or SE_HOR2EQU */ double *geopos, /* array of 3 doubles for geograph. pos. of observer */ double *xin, /* array of 2 doubles for azimuth and true altitude of planet */ double *xout); /* return array of 2 doubles for either ecliptic or equatorial coordinates, depending on calc_flag */ double swe_refrac( double inalt, double atpress, /* atmospheric pressure in mbar (hPa) */ double attemp, /* atmospheric temperature in degrees Celsius */ int32 calc_flag); /* either SE_TRUE_TO_APP or SE_APP_TO_TRUE */
Swiss Ephemeris 35 16.3. Date and time conversion Delta T from Julian day number * Ephemeris time (ET) = Universal time (UT) + swe_deltat(UT)*/ double swe_deltat(double tjd); Julian day number from year, month, day, hour, with check whether date is legal /*Return value: OK or ERR */ int swe_date_conversion ( int y , int m , int d , /* year, month, day */ double hour, /* hours (decimal, with fraction) */ char c, /* calendar ‘g’[regorian]|’j’[ulian] */ double *tjd); /* target address for Julian day */ Julian day number from year, month, day, hour double swe_julday( int year, int month, int day, double hour, int gregflag); /* Gregorian calendar: 1, Julian calendar: 0 */ Year, month, day, hour from Julian day number void swe_revjul ( double tjd, /* Julian day number */ int gregflag, /* Gregorian calendar: 1, Julian calendar: 0 */ int *year, /* target addresses for year, etc. */ int *month, int *day, double *hour); Get tidal acceleration used in swe_deltat() double swe_get_tid_acc(void); Set tidal acceleration to be used in swe_deltat() void swe_set_tid_acc(double t_acc); Equation of time / * function returns the difference between local apparent and local mean time. e = LAT – LMT. tjd_et is ephemeris time */ int swe_time_equ(double tjd_et, double *e, char *serr); 16.4. Initialization, setup, and closing functions Set directory path of ephemeris files int swe_set_ephe_path(char *path); /* set name of JPL ephemeris file */ int swe_set_jpl_file(char *fname); /* close Swiss Ephemeris */ void swe_close(void);
Page 1 and 2: Swiss Ephemeris 1 Programming inter
Page 3 and 4: Swiss Ephemeris 3 19.2 Delphi 1.0 (
Page 5 and 6: Swiss Ephemeris 5 /* * do the coord
Page 7 and 8: Swiss Ephemeris 7 2.3. Bodies ( int
Page 9 and 10: Swiss Ephemeris 9 Fictitious planet
Page 11 and 12: Swiss Ephemeris 11 Obliquity and nu
Page 13 and 14: Swiss Ephemeris 13 A barycentric po
Page 15 and 16: Swiss Ephemeris 15 Example: (3192)
Page 17 and 18: Swiss Ephemeris 17 6. Eclipse and p
Page 19 and 20: Swiss Ephemeris 19 This function ca
Page 21 and 22: Swiss Ephemeris 21 double *geopos,
Page 23 and 24: Swiss Ephemeris 23 where #define SE
Page 25 and 26: Swiss Ephemeris 25 10. Sidereal mod
Page 27 and 28: Swiss Ephemeris 27 11. The Ephemeri
Page 29 and 30: Swiss Ephemeris 29 armc1 = swe_sidt
Page 31 and 32: Swiss Ephemeris 31 double swe_sidti
Page 33: Swiss Ephemeris 33 16.2 Eclipses an
Page 37 and 38: Swiss Ephemeris 37 16.6. Auxiliary
Page 39 and 40: Swiss Ephemeris 39 the DLL to a uni
Page 41 and 42: Swiss Ephemeris 41 With the followi
Page 43 and 44: Swiss Ephemeris 43 31279 Nov 27 10:
Page 45 and 46: Swiss Ephemeris 45 iflgret = swe_ca
Page 47 and 48: Swiss Ephemeris 47 some VB5 declar
Page 49 and 50: Swiss Ephemeris 49 Changes from Ver
Page 51 and 52: Swiss Ephemeris 51 Index Flag Defau
Page 53 and 54: SWISS EPHEMERIS ...................
Page 55 and 56: SWISS EPHEMERIS Computer ephemeris
Page 57 and 58: 2. Descripition of the ephemerides
Page 59 and 60: 1900 - 1980 Saturn - Neptune a few
Page 61 and 62: etween our integration and the JPL
Page 63 and 64: motion. But there is an important d
Page 65 and 66: So, for a complete set of apsides,
Page 67 and 68: Availability of asteroid files: - a
Page 69 and 70: Halley is available for the period
Page 71 and 72: One can see that the error is in th
Page 73 and 74: Mercier gives the following ayanams
Page 75 and 76: David Cochrane adds 7) Yukteshvar 8
Page 77 and 78: If we follow this method, the posit
Page 79 and 80: second with the moon. With other bo
Page 81 and 82: The MC and ASC are respectively the
Page 83 and 84: Note however, that circumpolar bodi
Page 85 and 86:
* get tidal acceleration used in sw
Page 87 and 88:
travelling from the planet to the o
Page 89 and 90:
# collided with other asteroids. #
Page 91 and 92:
3753 Cruithne # often called the "s
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