BASTET/models/simple_atmosphere.py

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from input.natural_constants import *
import numpy as np
# ATMOSPHERE MODEL:
def T_air(h):
if h >= 0 and h <= 11000:
res = 288.15 - 0.0065 * h
return res
elif h > 11000 and h <= 20000:
res = 216.65
return res
elif h >= 20000:
res = 216.65 + 0.0010 * (h - 20000)
return res
def p_air(h):
if h >= 0 and h <= 11000:
res = 101325 * ((288.15 - 0.0065 * h)/288.15) ** 5.25577
return res
elif h > 11000 and h <= 20000:
res = 22632 * np.exp(-(h - 11000)/6341.62)
return res
elif h > 20000:
res = 5474.87 * ((216.65 + 0.0010 * (h - 20000))/216.65) ** (-34.163)
return res
def rho_air(h):
res = p_air(h)/(R_air * T_air(h))
return res