pvlib.solarposition.sun_rise_set_transit_geometric¶
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pvlib.solarposition.
sun_rise_set_transit_geometric
(times, latitude, longitude, declination, equation_of_time)[source]¶ Geometric calculation of solar sunrise, sunset, and transit.
Warning
The geometric calculation assumes a circular earth orbit with the sun as a point source at its center, and neglects the effect of atmospheric refraction on zenith. The error depends on location and time of year but is of order 10 minutes.
Parameters: - times (pandas.DatetimeIndex) – Corresponding timestamps, must be localized to the timezone for the
latitude
andlongitude
. - latitude (float) – Latitude in degrees, positive north of equator, negative to south
- longitude (float) – Longitude in degrees, positive east of prime meridian, negative to west
- declination (numeric) – declination angle in radians at
times
- equation_of_time (numeric) – difference in time between solar time and mean solar time in minutes
Returns: - sunrise (datetime) – localized sunrise time
- sunset (datetime) – localized sunset time
- transit (datetime) – localized sun transit time
References
[1] J. A. Duffie and W. A. Beckman, “Solar Engineering of Thermal Processes, 3rd Edition,” J. Wiley and Sons, New York (2006) [2] Frank Vignola et al., “Solar And Infrared Radiation Measurements,” CRC Press (2012) - times (pandas.DatetimeIndex) – Corresponding timestamps, must be localized to the timezone for the