Include dependency graph for sofa.h:
Functions | |
| int | iauCal2jd (int iy, int im, int id, double *djm0, double *djm) |
| Gregorian Calendar to Julian Date. More... | |
| double | iauEpb (double dj1, double dj2) |
| Julian Date to Besselian Epoch. More... | |
| void | iauEpb2jd (double epb, double *djm0, double *djm) |
| Besselian Epoch to Julian Date. More... | |
| double | iauEpj (double dj1, double dj2) |
| Julian Date to Julian Epoch. More... | |
| void | iauEpj2jd (double epj, double *djm0, double *djm) |
| Julian Epoch to Julian Date. More... | |
| int | iauJd2cal (double dj1, double dj2, int *iy, int *im, int *id, double *fd) |
| Julian Date to Gregorian year, month, day, and fraction of a day. More... | |
| int | iauJdcalf (int ndp, double dj1, double dj2, int iymdf[4]) |
| Julian Date to Gregorian Calendar. More... | |
| void | iauAb (double pnat[3], double v[3], double s, double bm1, double ppr[3]) |
| Apply aberration to transform natural direction into proper direction. More... | |
| void | iauApcg (double date1, double date2, double ebpv[2][3], double ehp[3], iauASTROM *astrom) |
| prepare star-independent astrometry parameters More... | |
| void | iauApcg13 (double date1, double date2, iauASTROM *astrom) |
| prepare star-independent astrometry parameters More... | |
| void | iauApci (double date1, double date2, double ebpv[2][3], double ehp[3], double x, double y, double s, iauASTROM *astrom) |
| prepare star-independent astrometry parameters More... | |
| void | iauApci13 (double date1, double date2, iauASTROM *astrom, double *eo) |
| prepare star-independent astrometry parameters More... | |
| void | iauApco (double date1, double date2, double ebpv[2][3], double ehp[3], double x, double y, double s, double theta, double elong, double phi, double hm, double xp, double yp, double sp, double refa, double refb, iauASTROM *astrom) |
| prepare star-independent astrometry parameters More... | |
| int | iauApco13 (double utc1, double utc2, double dut1, double elong, double phi, double hm, double xp, double yp, double phpa, double tc, double rh, double wl, iauASTROM *astrom, double *eo) |
| prepare star-independent astrometry parameters More... | |
| void | iauApcs (double date1, double date2, double pv[2][3], double ebpv[2][3], double ehp[3], iauASTROM *astrom) |
| prepare star-independent astrometry parameters More... | |
| void | iauApcs13 (double date1, double date2, double pv[2][3], iauASTROM *astrom) |
| prepare star-independent astrometry parameters More... | |
| void | iauAper (double theta, iauASTROM *astrom) |
| update the Earth rotation angle More... | |
| void | iauAper13 (double ut11, double ut12, iauASTROM *astrom) |
| update the Earth rotation angle More... | |
| void | iauApio (double sp, double theta, double elong, double phi, double hm, double xp, double yp, double refa, double refb, iauASTROM *astrom) |
| prepare star-independent astrometry parameters More... | |
| int | iauApio13 (double utc1, double utc2, double dut1, double elong, double phi, double hm, double xp, double yp, double phpa, double tc, double rh, double wl, iauASTROM *astrom) |
| prepare star-independent astrometry parameters More... | |
| void | iauAtci13 (double rc, double dc, double pr, double pd, double px, double rv, double date1, double date2, double *ri, double *di, double *eo) |
| Transform ICRS star data, epoch J2000.0, to CIRS. More... | |
| void | iauAtciq (double rc, double dc, double pr, double pd, double px, double rv, iauASTROM *astrom, double *ri, double *di) |
| Quick ICRS, epoch J2000.0, to CIRS transformation. More... | |
| void | iauAtciqn (double rc, double dc, double pr, double pd, double px, double rv, iauASTROM *astrom, int n, iauLDBODY b[], double *ri, double *di) |
| Quick ICRS, epoch J2000.0, to CIRS transformation. More... | |
| void | iauAtciqz (double rc, double dc, iauASTROM *astrom, double *ri, double *di) |
| Quick ICRS to CIRS transformation. More... | |
| int | iauAtco13 (double rc, double dc, double pr, double pd, double px, double rv, double utc1, double utc2, double dut1, double elong, double phi, double hm, double xp, double yp, double phpa, double tc, double rh, double wl, double *aob, double *zob, double *hob, double *dob, double *rob, double *eo) |
| ICRS RA,Dec to observed place. More... | |
| void | iauAtic13 (double ri, double di, double date1, double date2, double *rc, double *dc, double *eo) |
| Transform star RA,Dec from geocentric CIRS to ICRS astrometric. More... | |
| void | iauAticq (double ri, double di, iauASTROM *astrom, double *rc, double *dc) |
| Quick CIRS RA,Dec to ICRS astrometric place. More... | |
| void | iauAticqn (double ri, double di, iauASTROM *astrom, int n, iauLDBODY b[], double *rc, double *dc) |
| Quick CIRS to ICRS astrometric place transformation. More... | |
| int | iauAtio13 (double ri, double di, double utc1, double utc2, double dut1, double elong, double phi, double hm, double xp, double yp, double phpa, double tc, double rh, double wl, double *aob, double *zob, double *hob, double *dob, double *rob) |
| CIRS RA,Dec to observed place. More... | |
| void | iauAtioq (double ri, double di, iauASTROM *astrom, double *aob, double *zob, double *hob, double *dob, double *rob) |
| Quick CIRS to observed place transformation. More... | |
| int | iauAtoc13 (const char *type, double ob1, double ob2, double utc1, double utc2, double dut1, double elong, double phi, double hm, double xp, double yp, double phpa, double tc, double rh, double wl, double *rc, double *dc) |
| Observed place at a groundbased site to to ICRS astrometric RA,Dec. More... | |
| int | iauAtoi13 (const char *type, double ob1, double ob2, double utc1, double utc2, double dut1, double elong, double phi, double hm, double xp, double yp, double phpa, double tc, double rh, double wl, double *ri, double *di) |
| Observed place to CIRS. More... | |
| void | iauAtoiq (const char *type, double ob1, double ob2, iauASTROM *astrom, double *ri, double *di) |
| Quick observed place to CIRS. More... | |
| void | iauLd (double bm, double p[3], double q[3], double e[3], double em, double dlim, double p1[3]) |
| Apply light deflection by a solar-system body. More... | |
| void | iauLdn (int n, iauLDBODY b[], double ob[3], double sc[3], double sn[3]) |
| apply light deflection by multiple solar-system bodies More... | |
| void | iauLdsun (double p[3], double e[3], double em, double p1[3]) |
| Deflection of starlight by the Sun. More... | |
| void | iauPmpx (double rc, double dc, double pr, double pd, double px, double rv, double pmt, double pob[3], double pco[3]) |
| Proper motion and parallax. More... | |
| int | iauPmsafe (double ra1, double dec1, double pmr1, double pmd1, double px1, double rv1, double ep1a, double ep1b, double ep2a, double ep2b, double *ra2, double *dec2, double *pmr2, double *pmd2, double *px2, double *rv2) |
| Star proper motion. More... | |
| void | iauPvtob (double elong, double phi, double height, double xp, double yp, double sp, double theta, double pv[2][3]) |
| Position and velocity of a terrestrial observing station. More... | |
| void | iauRefco (double phpa, double tc, double rh, double wl, double *refa, double *refb) |
| Determine constants in the atmospheric refraction model. More... | |
| int | iauEpv00 (double date1, double date2, double pvh[2][3], double pvb[2][3]) |
| Earth position and velocity. More... | |
| int | iauPlan94 (double date1, double date2, int np, double pv[2][3]) |
| Approximate heliocentric position and velocity of a planet. More... | |
| double | iauFad03 (double t) |
| mean elongation of the Moon from the Sun More... | |
| double | iauFae03 (double t) |
| mean longitude of Earth. More... | |
| double | iauFaf03 (double t) |
| mean longitude of the Moon minus... More... | |
| double | iauFaju03 (double t) |
| mean longitude of Jupiter More... | |
| double | iauFal03 (double t) |
| mean anomaly of the Moon More... | |
| double | iauFalp03 (double t) |
| mean anomaly of the Sun More... | |
| double | iauFama03 (double t) |
| mean longitude of Mars. More... | |
| double | iauFame03 (double t) |
| mean longitude of Mercury. More... | |
| double | iauFane03 (double t) |
| mean longitude of Neptune. More... | |
| double | iauFaom03 (double t) |
| mean longitude Moon's ascending node More... | |
| double | iauFapa03 (double t) |
| general accumulated precession in longitude More... | |
| double | iauFasa03 (double t) |
| mean longitude of Saturn. More... | |
| double | iauFaur03 (double t) |
| mean longitude of Uranus More... | |
| double | iauFave03 (double t) |
| mean longitude of Venus More... | |
| void | iauBi00 (double *dpsibi, double *depsbi, double *dra) |
| Frame bias components of IAU 2000 precession-nutation models. More... | |
| void | iauBp00 (double date1, double date2, double rb[3][3], double rp[3][3], double rbp[3][3]) |
| Frame bias and precession, IAU 2000. More... | |
| void | iauBp06 (double date1, double date2, double rb[3][3], double rp[3][3], double rbp[3][3]) |
| Frame bias and precession, IAU 2006. More... | |
| void | iauBpn2xy (double rbpn[3][3], double *x, double *y) |
| Extract the X,Y coordinates of the Celestial Intermediate Pole. More... | |
| void | iauC2i00a (double date1, double date2, double rc2i[3][3]) |
| Form the celestial-to-intermediate matrix for a given date. More... | |
| void | iauC2i00b (double date1, double date2, double rc2i[3][3]) |
| Form the celestial-to-intermediate matrix for a given date . More... | |
| void | iauC2i06a (double date1, double date2, double rc2i[3][3]) |
| Form the celestial-to-intermediate matrix for a given date. More... | |
| void | iauC2ibpn (double date1, double date2, double rbpn[3][3], double rc2i[3][3]) |
| Form the celestial-to-intermediate matrix for a given date. More... | |
| void | iauC2ixy (double date1, double date2, double x, double y, double rc2i[3][3]) |
| Form the celestial to intermediate-frame-of-date matrix. More... | |
| void | iauC2ixys (double x, double y, double s, double rc2i[3][3]) |
| Form the celestial to intermediate-frame-of-date matrix. More... | |
| void | iauC2t00a (double tta, double ttb, double uta, double utb, double xp, double yp, double rc2t[3][3]) |
| Form the celestial to terrestrial matrix. More... | |
| void | iauC2t00b (double tta, double ttb, double uta, double utb, double xp, double yp, double rc2t[3][3]) |
| Form the celestial to terrestrial matrix. More... | |
| void | iauC2t06a (double tta, double ttb, double uta, double utb, double xp, double yp, double rc2t[3][3]) |
| Form the celestial to terrestrial matrix. More... | |
| void | iauC2tcio (double rc2i[3][3], double era, double rpom[3][3], double rc2t[3][3]) |
| Assemble the celestial to terrestrial matrix. More... | |
| void | iauC2teqx (double rbpn[3][3], double gst, double rpom[3][3], double rc2t[3][3]) |
| Assemble the celestial to terrestrial matrix. More... | |
| void | iauC2tpe (double tta, double ttb, double uta, double utb, double dpsi, double deps, double xp, double yp, double rc2t[3][3]) |
| Form the celestial to terrestrial matrix. More... | |
| void | iauC2txy (double tta, double ttb, double uta, double utb, double x, double y, double xp, double yp, double rc2t[3][3]) |
| Form the celestial to terrestrial matrix. More... | |
| double | iauEo06a (double date1, double date2) |
| Equation of the origins. More... | |
| double | iauEors (double rnpb[3][3], double s) |
| Equation of the origins. More... | |
| void | iauFw2m (double gamb, double phib, double psi, double eps, double r[3][3]) |
| Form rotation matrix given the Fukushima-Williams angles. More... | |
| void | iauFw2xy (double gamb, double phib, double psi, double eps, double *x, double *y) |
| CIP X,Y given Fukushima-Williams bias-precession-nutation angles. More... | |
| void | iauLtp (double epj, double rp[3][3]) |
| Long-term precession matrix.Notes: More... | |
| void | iauLtpb (double epj, double rpb[3][3]) |
| Long-term precession matrix, including ICRS frame bias.Notes: More... | |
| void | iauLtpecl (double epj, double vec[3]) |
| Long-term precession of the ecliptic.Notes: More... | |
| void | iauLtpequ (double epj, double veq[3]) |
| Long-term precession of the equator. Notes: More... | |
| void | iauNum00a (double date1, double date2, double rmatn[3][3]) |
| Form the matrix of nutation for a given date. More... | |
| void | iauNum00b (double date1, double date2, double rmatn[3][3]) |
| Form the matrix of nutation for a given date. More... | |
| void | iauNum06a (double date1, double date2, double rmatn[3][3]) |
| Form the matrix of nutation for a given date. More... | |
| void | iauNumat (double epsa, double dpsi, double deps, double rmatn[3][3]) |
| Form the matrix of nutation. More... | |
| void | iauNut00a (double date1, double date2, double *dpsi, double *deps) |
| Nutation, IAU 2000A model. More... | |
| void | iauNut00b (double date1, double date2, double *dpsi, double *deps) |
| Nutation, IAU 2000B model. More... | |
| void | iauNut06a (double date1, double date2, double *dpsi, double *deps) |
| IAU 2000A nutation with adjustments. More... | |
| void | iauNut80 (double date1, double date2, double *dpsi, double *deps) |
| Nutation, IAU 1980 model. More... | |
| void | iauNutm80 (double date1, double date2, double rmatn[3][3]) |
| Form the matrix of nutation for a given date,. More... | |
| double | iauObl06 (double date1, double date2) |
| Mean obliquity of the ecliptic. More... | |
| double | iauObl80 (double date1, double date2) |
| Mean obliquity of the ecliptic. More... | |
| void | iauP06e (double date1, double date2, double *eps0, double *psia, double *oma, double *bpa, double *bqa, double *pia, double *bpia, double *epsa, double *chia, double *za, double *zetaa, double *thetaa, double *pa, double *gam, double *phi, double *psi) |
| Precession angles. More... | |
| void | iauPb06 (double date1, double date2, double *bzeta, double *bz, double *btheta) |
| forms three Euler angles which implement general precession from epoch J2000.0, More... | |
| void | iauPfw06 (double date1, double date2, double *gamb, double *phib, double *psib, double *epsa) |
| Precession angles, IAU 2006 (Fukushima-Williams 4-angle formulation). More... | |
| void | iauPmat00 (double date1, double date2, double rbp[3][3]) |
| Precession matrix from GCRS to specified date. More... | |
| void | iauPmat06 (double date1, double date2, double rbp[3][3]) |
| Precession matrix from GCRS to a specified date. More... | |
| void | iauPmat76 (double date1, double date2, double rmatp[3][3]) |
| Precession matrix from J2000.0 to a specified date. More... | |
| void | iauPn00 (double date1, double date2, double dpsi, double deps, double *epsa, double rb[3][3], double rp[3][3], double rbp[3][3], double rn[3][3], double rbpn[3][3]) |
| Precession-nutation, IAU 2000 model. More... | |
| void | iauPn00a (double date1, double date2, double *dpsi, double *deps, double *epsa, double rb[3][3], double rp[3][3], double rbp[3][3], double rn[3][3], double rbpn[3][3]) |
| Precession-nutation, IAU 2000A model. More... | |
| void | iauPn00b (double date1, double date2, double *dpsi, double *deps, double *epsa, double rb[3][3], double rp[3][3], double rbp[3][3], double rn[3][3], double rbpn[3][3]) |
| Precession-nutation, IAU 2000B model. More... | |
| void | iauPn06 (double date1, double date2, double dpsi, double deps, double *epsa, double rb[3][3], double rp[3][3], double rbp[3][3], double rn[3][3], double rbpn[3][3]) |
| Precession-nutation, IAU 2006 model. More... | |
| void | iauPn06a (double date1, double date2, double *dpsi, double *deps, double *epsa, double rb[3][3], double rp[3][3], double rbp[3][3], double rn[3][3], double rbpn[3][3]) |
| Precession-nutation, IAU 2006/2000A models. More... | |
| void | iauPnm00a (double date1, double date2, double rbpn[3][3]) |
| Form the matrix of precession-nutation. More... | |
| void | iauPnm00b (double date1, double date2, double rbpn[3][3]) |
| Form the matrix of precession-nutation. More... | |
| void | iauPnm06a (double date1, double date2, double rnpb[3][3]) |
| Form the matrix of precession-nutation. More... | |
| void | iauPnm80 (double date1, double date2, double rmatpn[3][3]) |
| Form the matrix of precession/nutation. More... | |
| void | iauPom00 (double xp, double yp, double sp, double rpom[3][3]) |
| Form the matrix of polar motion. More... | |
| void | iauPr00 (double date1, double date2, double *dpsipr, double *depspr) |
| Precession-rate part of the IAU 2000 models. More... | |
| void | iauPrec76 (double date01, double date02, double date11, double date12, double *zeta, double *z, double *theta) |
| IAU 1976 precession model. More... | |
| double | iauS00 (double date1, double date2, double x, double y) |
| The CIO locators given CIP coordinates. More... | |
| double | iauS00a (double date1, double date2) |
| The CIO locator using the IA2000A precission-nutation model. More... | |
| double | iauS00b (double date1, double date2) |
| The CIO locator using the IAU 2000B precission-nutation model. More... | |
| double | iauS06 (double date1, double date2, double x, double y) |
| The CIO locator given CIP coordinates. More... | |
| double | iauS06a (double date1, double date2) |
| The CIO locator using IAU2006 precession and IAU 2000A nutation models. More... | |
| double | iauSp00 (double date1, double date2) |
| The TIO locator. More... | |
| void | iauXy06 (double date1, double date2, double *x, double *y) |
| X,Y coordinates of celestial intermediate pole. More... | |
| void | iauXys00a (double date1, double date2, double *x, double *y, double *s) |
| Compute X,Y coordinates of the CIP and CIO locator. More... | |
| void | iauXys00b (double date1, double date2, double *x, double *y, double *s) |
| Compute X,Y coordinates of the CIP and CIO locator. More... | |
| void | iauXys06a (double date1, double date2, double *x, double *y, double *s) |
| Compute X,Y coordinates of the CIP and CIO locator. More... | |
| double | iauEe00 (double date1, double date2, double epsa, double dpsi) |
| The equation of the equinoxes. More... | |
| double | iauEe00a (double date1, double date2) |
| Equation of the equinoxes. More... | |
| double | iauEe00b (double date1, double date2) |
| Equation of the equinoxes. More... | |
| double | iauEe06a (double date1, double date2) |
| Equation of the equinoxes. More... | |
| double | iauEect00 (double date1, double date2) |
| Equation of the equinoxes. More... | |
| double | iauEqeq94 (double date1, double date2) |
| Equation of the equinoxes. More... | |
| double | iauEra00 (double dj1, double dj2) |
| Earth rotation angle. More... | |
| double | iauGmst00 (double uta, double utb, double tta, double ttb) |
| Greenwich mean sidereal time. More... | |
| double | iauGmst06 (double uta, double utb, double tta, double ttb) |
| Greenwich mean sidereal time. More... | |
| double | iauGmst82 (double dj1, double dj2) |
| Universal Time to Greenwich mean sidereal time. More... | |
| double | iauGst00a (double uta, double utb, double tta, double ttb) |
| Greenwich apparent sidereal time. More... | |
| double | iauGst00b (double uta, double utb) |
| Greenwich apparent sidereal time. More... | |
| double | iauGst06 (double uta, double utb, double tta, double ttb, double rnpb[3][3]) |
| Greenwich apparent sidereal time. More... | |
| double | iauGst06a (double uta, double utb, double tta, double ttb) |
| Greenwich apparent sidereal time. More... | |
| double | iauGst94 (double uta, double utb) |
| Greenwich apparent sidereal time. More... | |
| int | iauPvstar (double pv[2][3], double *ra, double *dec, double *pmr, double *pmd, double *px, double *rv) |
| Convert star position+velocity vector to catalog coordinates. More... | |
| int | iauStarpv (double ra, double dec, double pmr, double pmd, double px, double rv, double pv[2][3]) |
| Convert star catalog coordinates to position+velocity vector. More... | |
| void | iauFk425 (double r1950, double d1950, double dr1950, double dd1950, double p1950, double v1950, double *r2000, double *d2000, double *dr2000, double *dd2000, double *p2000, double *v2000) |
| Convert B1950.0 FK4 star catalog data to J2000.0 FK5.Notes: More... | |
| void | iauFk45z (double r1950, double d1950, double bepoch, double *r2000, double *d2000) |
| Convert a B1950.0 FK4 star position to J2000.0 FK5.Convert a B1950.0 FK4 star position to J2000.0 FK5, assuming zero proper motion in the FK5 system. This function converts a star's catalog data from the old FK4 (Bessel-Newcomb) system to the later IAU 1976 FK5 (Fricke) system, in such a way that the FK5 proper motion is zero. Because such a star has, in general, a non-zero proper motion in the FK4 system, the routine requires the epoch at which the position in the FK4 system was determined. More... | |
| void | iauFk524 (double r2000, double d2000, double dr2000, double dd2000, double p2000, double v2000, double *r1950, double *d1950, double *dr1950, double *dd1950, double *p1950, double *v1950) |
| Convert J2000.0 FK5 star catalog data to B1950.0 FK4.Notes: More... | |
| void | iauFk52h (double r5, double d5, double dr5, double dd5, double px5, double rv5, double *rh, double *dh, double *drh, double *ddh, double *pxh, double *rvh) |
| Transform FK5 star data into the Hipparcos system. More... | |
| void | iauFk54z (double r2000, double d2000, double bepoch, double *r1950, double *d1950, double *dr1950, double *dd1950) |
| Convert a J2000.0 FK5 star position to B1950.0 FK4Convert a J2000.0 FK5 star position to B1950.0 FK4, assuming zero proper motion in FK5 and parallax. Notes: More... | |
| void | iauFk5hip (double r5h[3][3], double s5h[3]) |
| FK5 to Hipparcos rotation and spin. More... | |
| void | iauFk5hz (double r5, double d5, double date1, double date2, double *rh, double *dh) |
| Transform an FK5 star position into the Hipparcos system. More... | |
| void | iauH2fk5 (double rh, double dh, double drh, double ddh, double pxh, double rvh, double *r5, double *d5, double *dr5, double *dd5, double *px5, double *rv5) |
| Transform Hipparcos star data into the FK5 (J2000.0) system. More... | |
| void | iauHfk5z (double rh, double dh, double date1, double date2, double *r5, double *d5, double *dr5, double *dd5) |
| Transform a Hipparcos star position into FK5 J2000.0. More... | |
| int | iauStarpm (double ra1, double dec1, double pmr1, double pmd1, double px1, double rv1, double ep1a, double ep1b, double ep2a, double ep2b, double *ra2, double *dec2, double *pmr2, double *pmd2, double *px2, double *rv2) |
| Star proper motion. More... | |
| void | iauEceq06 (double date1, double date2, double dl, double db, double *dr, double *dd) |
| Transformation from ecliptic coordinates (mean equinox and ecliptic of date) to ICRS RA,Dec, using the IAU 2006 precession model. More... | |
| void | iauEcm06 (double date1, double date2, double rm[3][3]) |
| ICRS equatorial to ecliptic rotation matrix, IAU 2006. More... | |
| void | iauEqec06 (double date1, double date2, double dr, double dd, double *dl, double *db) |
| Transformation from ICRS equatorial coordinates to ecliptic coordinates. More... | |
| void | iauLteceq (double epj, double dl, double db, double *dr, double *dd) |
| Transformation from ecliptic coordinates (mean equinox and ecliptic of date) to ICRS RA,Dec.Transformation from ecliptic coordinates (mean equinox and ecliptic of date) to ICRS RA,Dec, using a long-term precession model. 1) No assumptions are made about whether the coordinates represent starlight and embody astrometric effects such as parallax or aberration. More... | |
| void | iauLtecm (double epj, double rm[3][3]) |
| ICRS equatorial to ecliptic rotation matrix, long-term. More... | |
| void | iauLteqec (double epj, double dr, double dd, double *dl, double *db) |
| Transformation from ICRS equatorial coordinates to ecliptic coordinates. More... | |
| void | iauG2icrs (double dl, double db, double *dr, double *dd) |
| Transformation from Galactic Coordinates to ICRS. More... | |
| void | iauIcrs2g (double dr, double dd, double *dl, double *db) |
| Transformation from ICRS to Galactic Coordinates. More... | |
| int | iauEform (int n, double *a, double *f) |
| Earth reference ellipsoids. More... | |
| int | iauGc2gd (int n, double xyz[3], double *elong, double *phi, double *height) |
| Transform geocentric coordinates to geodetic. More... | |
| int | iauGc2gde (double a, double f, double xyz[3], double *elong, double *phi, double *height) |
| Transform geocentric coordinates to geodetic. More... | |
| int | iauGd2gc (int n, double elong, double phi, double height, double xyz[3]) |
| Transform geodetic coordinates to geocentric. More... | |
| int | iauGd2gce (double a, double f, double elong, double phi, double height, double xyz[3]) |
| Transform geodetic coordinates to geocentric. More... | |
| int | iauD2dtf (const char *scale, int ndp, double d1, double d2, int *iy, int *im, int *id, int ihmsf[4]) |
| Format for output a 2-part Julian Date. More... | |
| int | iauDat (int iy, int im, int id, double fd, double *deltat) |
| For a given UTC date, calculate delta(AT) = TAI-UTC. More... | |
| double | iauDtdb (double date1, double date2, double ut, double elong, double u, double v) |
| An approximation to TDB-TT. More... | |
| int | iauDtf2d (const char *scale, int iy, int im, int id, int ihr, int imn, double sec, double *d1, double *d2) |
| Encode date and time fields into 2-part Julian Date. More... | |
| int | iauTaitt (double tai1, double tai2, double *tt1, double *tt2) |
| TAI to TT. More... | |
| int | iauTaiut1 (double tai1, double tai2, double dta, double *ut11, double *ut12) |
| TAI to UT1. More... | |
| int | iauTaiutc (double tai1, double tai2, double *utc1, double *utc2) |
| TAI to UTC. More... | |
| int | iauTcbtdb (double tcb1, double tcb2, double *tdb1, double *tdb2) |
| TCB to TDB. More... | |
| int | iauTcgtt (double tcg1, double tcg2, double *tt1, double *tt2) |
| TCG to TT. More... | |
| int | iauTdbtcb (double tdb1, double tdb2, double *tcb1, double *tcb2) |
| TDB to TCB. More... | |
| int | iauTdbtt (double tdb1, double tdb2, double dtr, double *tt1, double *tt2) |
| TDB to TT. More... | |
| int | iauTttai (double tt1, double tt2, double *tai1, double *tai2) |
| TT to TAI. More... | |
| int | iauTttcg (double tt1, double tt2, double *tcg1, double *tcg2) |
| TT to TCG. More... | |
| int | iauTttdb (double tt1, double tt2, double dtr, double *tdb1, double *tdb2) |
| TT to TDB. More... | |
| int | iauTtut1 (double tt1, double tt2, double dt, double *ut11, double *ut12) |
| TT to UT1. More... | |
| int | iauUt1tai (double ut11, double ut12, double dta, double *tai1, double *tai2) |
| UT1 to TAI. More... | |
| int | iauUt1tt (double ut11, double ut12, double dt, double *tt1, double *tt2) |
| UT1 to TT. More... | |
| int | iauUt1utc (double ut11, double ut12, double dut1, double *utc1, double *utc2) |
| UT1 to UTC. More... | |
| int | iauUtctai (double utc1, double utc2, double *tai1, double *tai2) |
| UTC to TAI. More... | |
| int | iauUtcut1 (double utc1, double utc2, double dut1, double *ut11, double *ut12) |
| UTC to UT1. More... | |
| void | iauAe2hd (double az, double el, double phi, double *ha, double *dec) |
| Horizon to equatorial coordinates: transform azimuth and altitude to hour angle and declination. More... | |
| void | iauHd2ae (double ha, double dec, double phi, double *az, double *el) |
| Equatorial to horizon coordinates. More... | |
| double | iauHd2pa (double ha, double dec, double phi) |
| Parallactic angle for a given hour angle and declination.Notes: More... | |
| int | iauTpors (double xi, double eta, double a, double b, double *a01, double *b01, double *a02, double *b02) |
| In the tangent plane projection, determine the spherical coordinates of the tangent point. More... | |
| int | iauTporv (double xi, double eta, double v[3], double v01[3], double v02[3]) |
| In the tangent plane projection, determine the direction cosines of the tangent point. More... | |
| void | iauTpsts (double xi, double eta, double a0, double b0, double *a, double *b) |
| In the tangent plane projection, solve for the spherical coordinates of the star. More... | |
| void | iauTpstv (double xi, double eta, double v0[3], double v[3]) |
| In the tangent plane projection, solve for the direction cosines of the star. More... | |
| int | iauTpxes (double a, double b, double a0, double b0, double *xi, double *eta) |
| In the tangent plane projection, solve for the star's rectangular coordinates in the tangent plane.Notes: More... | |
| int | iauTpxev (double v[3], double v0[3], double *xi, double *eta) |
| In the tangent plane projection, solve for the star's rectangular coordinates in the tangent plane.In the tangent plane projection, given celestial direction cosines for a star and the tangent point, solve for the star's rectangular coordinates in the tangent plane. More... | |
| void | iauA2af (int ndp, double angle, char *sign, int idmsf[4]) |
| Decompose radians into degrees, arcminutes, arcseconds, fraction. More... | |
| void | iauA2tf (int ndp, double angle, char *sign, int ihmsf[4]) |
| Decompose radians into hours, minutes, seconds, fraction. More... | |
| int | iauAf2a (char s, int ideg, int iamin, double asec, double *rad) |
| Convert degrees, arcminutes, arcseconds to radians. More... | |
| double | iauAnp (double a) |
| Normalize angle into the range 0 <= a < 2pi. More... | |
| double | iauAnpm (double a) |
| Normalize angle into the range -pi <= a < +pi. More... | |
| void | iauD2tf (int ndp, double days, char *sign, int ihmsf[4]) |
| Decompose days to hours, minutes, seconds, fraction. More... | |
| int | iauTf2a (char s, int ihour, int imin, double sec, double *rad) |
| Convert hours, minutes, seconds to radians. More... | |
| int | iauTf2d (char s, int ihour, int imin, double sec, double *days) |
| Convert hours, minutes, seconds to days. More... | |
| void | iauRx (double phi, double r[3][3]) |
| Rotate an r-matrix about the x-axis. More... | |
| void | iauRy (double theta, double r[3][3]) |
| Rotate an r-matrix about the y-axis. More... | |
| void | iauRz (double psi, double r[3][3]) |
| Rotate an r-matrix about the z-axis. More... | |
| void | iauCp (double p[3], double c[3]) |
| Copy a p-vector. More... | |
| void | iauCpv (double pv[2][3], double c[2][3]) |
| Copy a position/velocity vector. More... | |
| void | iauCr (double r[3][3], double c[3][3]) |
| Copy an r-matrix. More... | |
| void | iauP2pv (double p[3], double pv[2][3]) |
| Extend a p-vector to a pv-vector by appending a zero velocity. More... | |
| void | iauPv2p (double pv[2][3], double p[3]) |
| Discard velocity component of a pv-vector. More... | |
| void | iauIr (double r[3][3]) |
| Initialize an r-matrix to the identity matrix. More... | |
| void | iauZp (double p[3]) |
| Zero a p-vector. More... | |
| void | iauZpv (double pv[2][3]) |
| Zero a pv-vector. More... | |
| void | iauZr (double r[3][3]) |
| Initialize an r-matrix to the null matrix. More... | |
| void | iauRxr (double a[3][3], double b[3][3], double atb[3][3]) |
| Multiply two r-matrices. More... | |
| void | iauTr (double r[3][3], double rt[3][3]) |
| Transpose an r-matrix. More... | |
| void | iauRxp (double r[3][3], double p[3], double rp[3]) |
| Multiply a p-vector by an r-matrix. More... | |
| void | iauRxpv (double r[3][3], double pv[2][3], double rpv[2][3]) |
| Multiply a pv-vector by an r-matrix. More... | |
| void | iauTrxp (double r[3][3], double p[3], double trp[3]) |
| Multiply a p-vector by the transpose of an r-matrix. More... | |
| void | iauTrxpv (double r[3][3], double pv[2][3], double trpv[2][3]) |
| Multiply a pv-vector by the transpose of an r-matrix. More... | |
| void | iauRm2v (double r[3][3], double w[3]) |
| Express an r-matrix as an r-vector. More... | |
| void | iauRv2m (double w[3], double r[3][3]) |
| Form the r-matrix corresponding to a given r-vector. More... | |
| double | iauPap (double a[3], double b[3]) |
| Position-angle from two p-vectors. More... | |
| double | iauPas (double al, double ap, double bl, double bp) |
| Position-angle from spherical coordinates. More... | |
| double | iauSepp (double a[3], double b[3]) |
| Angular separation between two p-vectors. More... | |
| double | iauSeps (double al, double ap, double bl, double bp) |
| Angular separation between two sets of spherical coordinates. More... | |
| void | iauC2s (double p[3], double *theta, double *phi) |
| P-vector to spherical coordinates. More... | |
| void | iauP2s (double p[3], double *theta, double *phi, double *r) |
| P-vector to spherical polar coordinates. More... | |
| void | iauPv2s (double pv[2][3], double *theta, double *phi, double *r, double *td, double *pd, double *rd) |
| Convert position/velocity from Cartesian to spherical coordinates. More... | |
| void | iauS2c (double theta, double phi, double c[3]) |
| Convert spherical coordinates to Cartesian. More... | |
| void | iauS2p (double theta, double phi, double r, double p[3]) |
| Convert spherical polar coordinates to p-vector. More... | |
| void | iauS2pv (double theta, double phi, double r, double td, double pd, double rd, double pv[2][3]) |
| double | iauPdp (double a[3], double b[3]) |
| p-vector inner (=scalar=dot) product. More... | |
| double | iauPm (double p[3]) |
| Modulus of p-vector. More... | |
| void | iauPmp (double a[3], double b[3], double amb[3]) |
| P-vector subtraction. More... | |
| void | iauPn (double p[3], double *r, double u[3]) |
| Convert a p-vector into modulus and unit vector. More... | |
| void | iauPpp (double a[3], double b[3], double apb[3]) |
| P-vector addition. More... | |
| void | iauPpsp (double a[3], double s, double b[3], double apsb[3]) |
| P-vector scale and addition. More... | |
| void | iauPvdpv (double a[2][3], double b[2][3], double adb[2]) |
| Inner (=scalar=dot) product of two pv-vectors. More... | |
| void | iauPvm (double pv[2][3], double *r, double *s) |
| Modulus of pv-vector. More... | |
| void | iauPvmpv (double a[2][3], double b[2][3], double amb[2][3]) |
| Subtract one pv-vector from another. More... | |
| void | iauPvppv (double a[2][3], double b[2][3], double apb[2][3]) |
| Add one pv-vector to another. More... | |
| void | iauPvu (double dt, double pv[2][3], double upv[2][3]) |
| Update a pv-vector. More... | |
| void | iauPvup (double dt, double pv[2][3], double p[3]) |
| Update a pv-vector, discarding the velocity component. More... | |
| void | iauPvxpv (double a[2][3], double b[2][3], double axb[2][3]) |
| Outer (=vector=cross) product of two pv-vectors.Notes: More... | |
| void | iauPxp (double a[3], double b[3], double axb[3]) |
| p-vector outer (=vector=cross) product. More... | |
| void | iauS2xpv (double s1, double s2, double pv[2][3], double spv[2][3]) |
| Multiply a pv-vector by two scalars. More... | |
| void | iauSxp (double s, double p[3], double sp[3]) |
| Multiply a p-vector by a scalar. More... | |
| void | iauSxpv (double s, double pv[2][3], double spv[2][3]) |
| Multiply a pv-vector by a scalar. More... | |
Function Documentation
◆ iauLtpequ()
| void iauLtpequ | ( | double | epj, |
| double | veq[3] | ||
| ) |
Long-term precession of the equator. Notes:
1) The returned vector is with respect to the J2000.0 mean equator and equinox.
2) The Vondrak et al. (2011, 2012) 400 millennia precession model agrees with the IAU 2006 precession at J2000.0 and stays within 100 microarcseconds during the 20th and 21st centuries. It is accurate to a few arcseconds throughout the historical period, worsening to a few tenths of a degree at the end of the +/- 200,000 year time span.
- Parameters
-
[in] epj Julian epoch (TT) [out] veq equator pole unit vector
◆ iauS2pv()
| void iauS2pv | ( | double | theta, |
| double | phi, | ||
| double | r, | ||
| double | td, | ||
| double | pd, | ||
| double | rd, | ||
| double | pv[2][3] | ||
| ) |
◆ iauTpors()
| int iauTpors | ( | double | xi, |
| double | eta, | ||
| double | a, | ||
| double | b, | ||
| double * | a01, | ||
| double * | b01, | ||
| double * | a02, | ||
| double * | b02 | ||
| ) |
In the tangent plane projection, determine the spherical coordinates of the tangent point.
In the tangent plane projection, given the rectangular coordinates of a star and its spherical coordinates, determine the spherical coordinates of the tangent point.
Notes:
1) The tangent plane projection is also called the "gnomonic projection" and the "central projection".
2) The eta axis points due north in the adopted coordinate system. If the spherical coordinates are observed (RA,Dec), the tangent plane coordinates (xi,eta) are conventionally called the "standard coordinates". If the spherical coordinates are with respect to a right-handed triad, (xi,eta) are also right-handed. The units of (xi,eta) are, effectively, radians at the tangent point.
3) All angular arguments are in radians.
4) The angles a01 and a02 are returned in the range 0-2pi. The angles b01 and b02 are returned in the range +/-pi, but in the usual, non-pole-crossing, case, the range is +/-pi/2.
5) Cases where there is no solution can arise only near the poles. For example, it is clearly impossible for a star at the pole itself to have a non-zero xi value, and hence it is meaningless to ask where the tangent point would have to be to bring about this combination of xi and dec.
6) Also near the poles, cases can arise where there are two useful solutions. The return value indicates whether the second of the two solutions returned is useful; 1 indicates only one useful solution, the usual case.
7) The basis of the algorithm is to solve the spherical triangle PSC, where P is the north celestial pole, S is the star and C is the tangent point. The spherical coordinates of the tangent point are [a0,b0]; writing rho^2 = (xi^2+eta^2) and r^2 = (1+rho^2), side c is then (pi/2-b), side p is sqrt(xi^2+eta^2) and side s (to be found) is (pi/2-b0). Angle C is given by sin(C) = xi/rho and cos(C) = eta/rho. Angle P (to be found) is the longitude difference between star and tangent point (a-a0).
8) This function is a member of the following set:
spherical vector solve for
iauTpxes iauTpxev xi,eta
iauTpsts iauTpstv star
> iauTpors < iauTporv origin
- Parameters
-
[in] xi rectangular coordinates of star image [in] eta rectangular coordinates of star image [out] a01 tangent point's spherical coordinates soln 1 [out] b01 tangent point's spherical coordinates soln 1 [out] a02 tangent point's spherical coordinates soln 2 [out] b02 tangent point's spherical coordinates soln 2
- Returns
- number of solutions: 0= no solutions returnd, 1 = only the first solution is useful, 2= both solutions are useful.
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