2021-06-07 12:56:45 +08:00
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import numpy as np
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2021-01-22 15:27:31 +08:00
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# Some physical constants at sea level
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2021-06-07 12:56:45 +08:00
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R0 = 6371.0008 # volumetric radius of the Earth, [km]
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2021-01-22 15:27:31 +08:00
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g0 = 9.80665 # standard gravity acceleration, [m/s^2]
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M0 = 28.9644 # mean molecular weight, [kg/kmol]
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R_air = 8314.32/M0 # gas constant for dry air, [J/kg/K]
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gamma = 1.4 # specific heat ratio, namely the ratio of constant-pressure to constant-volume specific heat
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2021-06-07 12:56:45 +08:00
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T0 = 288.15 # temperature, [K]
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2021-01-22 15:27:31 +08:00
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p0 = 101325 # pressure, [Pa]
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2021-06-07 12:56:45 +08:00
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h0 = 0 # height, [km]
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pi = np.pi
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twopi = 2*np.pi
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fourpi = 4*np.pi
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degrad = pi / 180
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al10 = np.log(10)
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2023-07-16 23:03:30 +08:00
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avogad = 6.02257e26 # The Avogadro's number in mks units (molecules/kmol)
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2021-06-07 12:56:45 +08:00
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pivo2 = 1.5707963
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pivo4 = 1.5707963
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2023-07-16 23:03:30 +08:00
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rstar = 8314.32 # The universal gas-constant in mks units (joules/K/kmol)
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2021-06-07 12:56:45 +08:00
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x = np.arange(0.5,48)/24
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