pvlib.solarposition.ephemeris¶
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pvlib.solarposition.
ephemeris
(time, latitude, longitude, pressure=101325, temperature=12)[source]¶ Python-native solar position calculator. The accuracy of this code is not guaranteed. Consider using the built-in spa_c code or the PyEphem library.
Parameters: - time (pandas.DatetimeIndex) – Must be localized or UTC will be assumed.
- latitude (float) – Latitude in decimal degrees. Positive north of equator, negative to south.
- longitude (float) – Longitude in decimal degrees. Positive east of prime meridian, negative to west.
- pressure (float or Series, default 101325) – Ambient pressure (Pascals)
- temperature (float or Series, default 12) – Ambient temperature (C)
Returns: DataFrame with the following columns –
- apparent_elevation : apparent sun elevation accounting for atmospheric refraction.
- elevation : actual elevation (not accounting for refraction) of the sun in decimal degrees, 0 = on horizon. The complement of the zenith angle.
- azimuth : Azimuth of the sun in decimal degrees East of North. This is the complement of the apparent zenith angle.
- apparent_zenith : apparent sun zenith accounting for atmospheric refraction.
- zenith : Solar zenith angle
- solar_time : Solar time in decimal hours (solar noon is 12.00).
References
[1] Grover Hughes’ class and related class materials on Engineering Astronomy at Sandia National Laboratories, 1985. See also