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libTheSky
Routines to compute sky positions of Sun, Moon, planets and more
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libTheSky
Routines to compute sky positions of Sun, Moon, planets and more
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Procedures to perform coordinate transformations, apply precession, and more for libTheSky. More...
Go to the source code of this file.
Modules | |
| module | thesky_coordinates |
| Procedures for coordinates. | |
Functions/Subroutines | |
| subroutine | thesky_coordinates::hc_spher_2_gc_rect (l, b, r, l0, b0, r0, x, y, z) |
| Compute the geocentric rectangular coordinates of a planet, from its and the Earth's heliocentric spherical position. | |
| subroutine | thesky_coordinates::ecl_spher_2_eq_rect (l, b, r, eps, x, y, z) |
| Convert spherical, ecliptical coordinates to rectangular, equatorial coordinates of an object - both geocentric. | |
| subroutine | thesky_coordinates::calcsunxyz (t1, l0, b0, r0, x, y, z) |
| Compute the geocentric equatorial rectangular coordinates of the Sun, from Earth's heliocentric, spherical position. | |
| subroutine | thesky_coordinates::precess_xyz (jd1, jd2, x, y, z) |
| Compute the precession of the equinoxes in rectangular coordinates, from jd1 to jd2. | |
| subroutine | thesky_coordinates::precess_eq (jd1, jd2, a1, d1) |
| Compute the precession of the equinoxes in equatorial coordinates, from jd1 to jd2. | |
| subroutine | thesky_coordinates::precess_eq_yr (yr1, yr2, a1, d1) |
| Compute the precession of the equinoxes in equatorial coordinates, from yr1 to yr2. | |
| subroutine | thesky_coordinates::precess_ecl (jd1, jd2, l, b) |
| Compute the precession of the equinoxes in geocentric ecliptical coordinates. | |
| subroutine | thesky_coordinates::precess_orb (jd1, jd2, i, o1, o2) |
| Compute the precession of the equinoxes in orbital elements. | |
| subroutine | thesky_coordinates::rect_2_spher (x, y, z, l, b, r) |
| Convert rectangular coordinates x,y,z to spherical coordinates l,b,r. | |
| subroutine | thesky_coordinates::aberration_ecl (t, l0, l, b) |
| Correct ecliptic longitude and latitiude for annual aberration. | |
| subroutine | thesky_coordinates::aberration_eq (jd, ra, dec, dra, ddec, eps0) |
| Correct equatorial coordinates for annual aberration - moderate accuracy, use for stars. | |
| subroutine | thesky_coordinates::fk5 (t, l, b) |
| Convert coordinates to the FK5 system. | |
| subroutine | thesky_coordinates::ecl_2_eq (l, b, eps, ra, dec) |
| Convert (geocentric) spherical ecliptical coordinates l,b (and eps) to spherical equatorial coordinates RA, Dec. | |
| subroutine | thesky_coordinates::eq_2_ecl (ra, dec, eps, l, b) |
| Convert (geocentric) spherical equatorial coordinates RA, Dec (and eps) to spherical ecliptical coordinates l,b. | |
| subroutine | thesky_coordinates::eq2horiz (ra, dec, agst, hh, az, alt, lat, lon) |
| Convert spherical equatorial coordinates (RA, dec, agst) to spherical horizontal coordinates (hh, az, alt) | |
| subroutine | thesky_coordinates::horiz2eq (az, alt, agst, hh, ra, dec, lat, lon) |
| Convert spherical horizontal coordinates (az, alt, agst) to spherical equatorial coordinates (hh, RA, dec) | |
| subroutine | thesky_coordinates::eq2gal (ra, dec, l, b) |
| Convert spherical equatorial coordinates (RA, dec) to spherical galactic coordinates (l,b), for J2000.0!!! | |
| subroutine | thesky_coordinates::gal2eq (l, b, ra, dec) |
| Convert spherical galactic coordinates (l,b) to spherical equatorial coordinates (RA, dec), for J2000.0!!! | |
| subroutine | thesky_coordinates::geoc2topoc_ecl (gcl, gcb, gcr, gcs, eps, lst, tcl, tcb, tcs, lat, hgt) |
| Convert spherical ecliptical coordinates from the geocentric to the topocentric system. | |
| subroutine | thesky_coordinates::geoc2topoc_eq (gcra, gcd, gcr, gch, tcra, tcd, lat, hgt) |
| Convert geocentric equatorial coordinates to topocentric. | |
| real(double) function | thesky_coordinates::refract (alt, press, temp) |
| Compute the atmospheric refraction for a given true altitude. You should add the result to the uncorrected altitude in order to obtain the observed altitude. Return 0 if alt + refract < -0.3°. | |
| real function | thesky_coordinates::refract_sp (alt, press, temp) |
| Compute the atmospheric refraction for a given true altitude, using single-precision values. This is a wrapper for refract(). | |
| real(double) function | thesky_coordinates::atmospheric_refraction (alt0, h0, lat0, t0, p0, rh, lam, dtdh, eps) |
| Compute the atmospheric refraction of light for a given true altitude. Return 0 for alt<-0.9°. This is a wrapper for aref(), which does the opposite (compute refraction for an apparent zenith angle). This is an expensive way to go about(!) | |
| real(double) function | thesky_coordinates::atmospheric_refraction_apparent (alt0, h0, ph, t0, p0, rh, lam, dtdh, eps) |
| Compute the atmospheric refraction of light for a given apparent (observed) altitude of a celestial object and a given observer. Note that you will usually want to use the true altitude as input instead. The method is based on N.A.O Technical Notes 59 and 63 and a paper by Standish and Auer 'Astronomical Refraction: Computational Method for all Zenith Angles'. Return 0 if alt<-1.102°. | |
| real(double) function | thesky_coordinates::aref (z0, h0, ph, t0, p0, rh, lam, dtdh, eps) |
| Compute the atmospheric refraction of light for a given apparent (observed) zenith angle. The method is based on N.A.O Technical Notes 59 and 63 and a paper by Standish and Auer 'Astronomical Refraction: Computational Method for all Zenith Angles'. Return 0 if z0>91.102°. | |
| real(double) function | thesky_coordinates::refi (r, n, dndr) |
| The refraction integrand for atmospheric_refraction_apparent() | |
| subroutine | thesky_coordinates::troposphere_model (r0, t0, a, r, t, n, dndr) |
| Troposphere model for atmospheric_refraction_apparent() | |
| subroutine | thesky_coordinates::stratosphere_model (rt, tt, nt, a, r, n, dndr) |
| Stratosphere model for atmospheric_refraction_apparent() | |
Procedures to perform coordinate transformations, apply precession, and more for libTheSky.
Definition in file coordinates.f90.
1.12.0
