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