pvlib.solarposition.calc_time¶
-
pvlib.solarposition.
calc_time
(lower_bound, upper_bound, latitude, longitude, attribute, value, altitude=0, pressure=101325, temperature=12, xtol=1e-12)[source]¶ Calculate the time between lower_bound and upper_bound where the attribute is equal to value. Uses PyEphem for solar position calculations.
Parameters: lower_bound : datetime.datetime
upper_bound : datetime.datetime
latitude : float
longitude : float
attribute : str
The attribute of a pyephem.Sun object that you want to solve for. Likely options are ‘alt’ and ‘az’ (which must be given in radians).
value : int or float
The value of the attribute to solve for
altitude : float
Distance above sea level.
pressure : int or float, optional
Air pressure in Pascals. Set to 0 for no atmospheric correction.
temperature : int or float, optional
Air temperature in degrees C.
xtol : float, optional
The allowed error in the result from value
Returns: datetime.datetime
Raises: ValueError
If the value is not contained between the bounds.
AttributeError
If the given attribute is not an attribute of a PyEphem.Sun object.