pvlib.solarposition.sun_rise_set_transit_geometric¶

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 and longitude.
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)

pvlib.solarposition.sun_rise_set_transit_spa

pvlib.spa