30 lines
820 B
Python
30 lines
820 B
Python
"""
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weather helper
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SPDX - License - Identifier: LGPL - 3.0 - or -later
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Copyright © 2020 Project Author Pilar Monsalvete pilar_monsalvete@yahoo.es
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"""
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import math
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import helpers.constants as cte
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class Weather(object):
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"""
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Weather class
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"""
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@staticmethod
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def sky_temperature(ambient_temperature):
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"""
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sky temperature from ambient temperature in degree Celsius
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:return: float
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"""
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# Swinbank - Source sky model approximation(1963) based on cloudiness statistics(32 %) in United States
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# ambient temperatures( in °C)
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# sky temperatures( in °C)
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values = []
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for temperature in ambient_temperature:
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value = 0.037536 * math.pow((temperature + cte.KELVIN), 1.5) \
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+ 0.32 * (temperature + cte.KELVIN) - cte.KELVIN
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values.append(value)
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return values
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