| aberration_correction(earth_radius_vector)
 |  | 
| apparent_sidereal_time(mean_sidereal_time, ...)
 |  | 
| apparent_sun_longitude(geocentric_longitude, ...)
 |  | 
| atmospheric_refraction_correction(...)
 |  | 
| calculate_deltat(year, month)
 | Calculate the difference between Terrestrial Dynamical Time (TD) and Universal Time (UT). | 
| earthsun_distance(unixtime, delta_t, numthreads)
 | Calculates the distance from the earth to the sun using the NREL SPA algorithm described in [1]. | 
| equation_of_time(sun_mean_longitude, ...)
 |  | 
| equatorial_horizontal_parallax(...)
 |  | 
| geocentric_latitude(heliocentric_latitude)
 |  | 
| geocentric_longitude(heliocentric_longitude)
 |  | 
| geocentric_sun_declination(...)
 |  | 
| geocentric_sun_right_ascension(...)
 |  | 
| heliocentric_latitude(jme)
 |  | 
| heliocentric_longitude(jme)
 |  | 
| heliocentric_radius_vector(jme)
 |  | 
| jcompile(*args, **kwargs)
 |  | 
| julian_century(julian_day)
 |  | 
| julian_day(unixtime)
 |  | 
| julian_day_dt(year, month, day, hour, ...)
 | This is the original way to calculate the julian day from the NREL paper. | 
| julian_ephemeris_century(julian_ephemeris_day)
 |  | 
| julian_ephemeris_day(julian_day, delta_t)
 |  | 
| julian_ephemeris_millennium(...)
 |  | 
| local_hour_angle(apparent_sidereal_time, ...)
 | Measured westward from south | 
| longitude_obliquity_nutation(...)
 |  | 
| mean_anomaly_moon(julian_ephemeris_century)
 |  | 
| mean_anomaly_sun(julian_ephemeris_century)
 |  | 
| mean_ecliptic_obliquity(...)
 |  | 
| mean_elongation(julian_ephemeris_century)
 |  | 
| mean_sidereal_time(julian_day, julian_century)
 |  | 
| moon_argument_latitude(julian_ephemeris_century)
 |  | 
| moon_ascending_longitude(...)
 |  | 
| nocompile(*args, **kwargs)
 |  | 
| parallax_sun_right_ascension(xterm, ...)
 |  | 
| solar_position(unixtime, lat, lon, elev, ...)
 | Calculate the solar position using the NREL SPA algorithm described in [1]. | 
| solar_position_loop(unixtime, delta_t, ...)
 | Loop through the time array and calculate the solar position | 
| solar_position_numba(unixtime, lat, lon, ...)
 | Calculate the solar position using the numba compiled functions and multiple threads. | 
| solar_position_numpy(unixtime, lat, lon, ...)
 | Calculate the solar position assuming unixtime is a numpy array. | 
| sum_mult_cos_add_mult(arr, x)
 |  | 
| sun_mean_longitude(julian_ephemeris_millennium)
 |  | 
| topocentric_astronomers_azimuth(...)
 |  | 
| topocentric_azimuth_angle(...)
 |  | 
| topocentric_elevation_angle(...)
 |  | 
| topocentric_elevation_angle_without_atmosphere(...)
 |  | 
| topocentric_local_hour_angle(...)
 |  | 
| topocentric_sun_declination(...)
 |  | 
| topocentric_sun_right_ascension(...)
 |  | 
| topocentric_zenith_angle(...)
 |  | 
| transit_sunrise_sunset(dates, lat, lon, ...)
 | Calculate the sun transit, sunrise, and sunset for a set of dates at a given location. | 
| true_ecliptic_obliquity(...)
 |  | 
| uterm(observer_latitude)
 |  | 
| xterm(u, observer_latitude, observer_elevation)
 |  | 
| yterm(u, observer_latitude, observer_elevation)
 |  |