pycontrails.physics.constants#
Meteorological, thermophysical, and aircraft constants.
Module Attributes
Absolute zero value \([C]\) |
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Gravitational acceleration \([m \ s^{-2}]\) |
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Radius of Earth \([m]\) |
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ISA height of the tropopause \([m]\) [Wikipedia contributors, 2023] |
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Surface pressure, international standard atmosphere \([Pa]\) [Wikipedia contributors, 2023] |
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Isobaric heat capacity of dry air \([J \ kg^{-1} \ K^{-1}]\) |
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Isobaric heat capacity of water vapor \([J \ kg^{-1} \ K^{-1}]\) |
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Molar mass of dry air \([kg \ mol^{-1}]\) |
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Molar mass of water \([kg \ mol^{-1}]\) |
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which heat capacities? |
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molar gas constant \([J \ mol^{-1} \ K^{-1}]\) |
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Gas constant of dry air \([J \ kg^{-1} \ K^{-1}]\) |
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Gas constant of water vapour \([J \ kg^{-1} \ K^{-1}]\) |
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Ratio of gas constant for dry air / gas constant for water vapor |
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Density of ice \([kg \ m^{-3}]\) |
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Adiabatic index air |
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Standard atmospheric density at mean sea level (MSL) \([kg \ m^{-3}]\) |
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Standard atmospheric temperature at mean sea level (MSL) \([K]\) |
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Speed of sound at mean sea level (MSL) in standard atmosphere \([m \ s^{-1}]\) |
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The rate at which the ISA ambient temperature falls with altitude \([K \ m^{-1}]\) [Wikipedia contributors, 2023] |
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Average incident solar radiation, \([W \ m^{-2}]\) This value can range +/- 3% as the earth orbits the sun. |
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Isobaric heat capacity of combustion products \([J \ kg^{-1} \ K^{-1}]\) |
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Real refractive index of ice |
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Wavelength of visible light (550 nm) |
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Ratio between the volume mean radius and the effective radius (Uncertainty +- 0.3) |
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Nominal rate of climb/descent of aircraft [\(m \ s^{-1}`\)] |
- pycontrails.physics.constants.M_d = 0.0289647#
Molar mass of dry air \([kg \ mol^{-1}]\)
- pycontrails.physics.constants.M_v = 0.0180153#
Molar mass of water \([kg \ mol^{-1}]\)
- pycontrails.physics.constants.R = 8.314462618#
molar gas constant \([J \ mol^{-1} \ K^{-1}]\)
- pycontrails.physics.constants.R_d = 287.05#
Gas constant of dry air \([J \ kg^{-1} \ K^{-1}]\)
- pycontrails.physics.constants.R_v = 461.51#
Gas constant of water vapour \([J \ kg^{-1} \ K^{-1}]\)
- pycontrails.physics.constants.T_lapse_rate = -0.0065#
The rate at which the ISA ambient temperature falls with altitude \([K \ m^{-1}]\) [Wikipedia contributors, 2023]
- pycontrails.physics.constants.T_msl = 288.15#
Standard atmospheric temperature at mean sea level (MSL) \([K]\)
- pycontrails.physics.constants.absolute_zero = -273.15#
Absolute zero value \([C]\)
- pycontrails.physics.constants.c_msl = 340.294#
Speed of sound at mean sea level (MSL) in standard atmosphere \([m \ s^{-1}]\)
- pycontrails.physics.constants.c_p_combustion = 1250.0#
Isobaric heat capacity of combustion products \([J \ kg^{-1} \ K^{-1}]\)
- pycontrails.physics.constants.c_pd = 1004.0#
Isobaric heat capacity of dry air \([J \ kg^{-1} \ K^{-1}]\)
- pycontrails.physics.constants.c_pv = 1870.0#
Isobaric heat capacity of water vapor \([J \ kg^{-1} \ K^{-1}]\)
- pycontrails.physics.constants.c_r = 0.9#
Ratio between the volume mean radius and the effective radius (Uncertainty +- 0.3)
- pycontrails.physics.constants.epsilon = 0.6219800221013629#
Ratio of gas constant for dry air / gas constant for water vapor
- pycontrails.physics.constants.g = 9.80665#
Gravitational acceleration \([m \ s^{-2}]\)
- pycontrails.physics.constants.gamma = 1.4#
which heat capacities?
- Type:
Ratio of heat capacities, TODO
- pycontrails.physics.constants.h_tropopause = 11000.0#
ISA height of the tropopause \([m]\) [Wikipedia contributors, 2023]
- pycontrails.physics.constants.kappa = 1.4#
Adiabatic index air
- pycontrails.physics.constants.lambda_light = 5.5e-07#
Wavelength of visible light (550 nm)
- pycontrails.physics.constants.mu_ice = 1.31#
Real refractive index of ice
- pycontrails.physics.constants.nominal_rocd = 12.7#
Nominal rate of climb/descent of aircraft [\(m \ s^{-1}`\)]
- pycontrails.physics.constants.p_surface = 101325.0#
Surface pressure, international standard atmosphere \([Pa]\) [Wikipedia contributors, 2023]
- pycontrails.physics.constants.radius_earth = 6371229.0#
Radius of Earth \([m]\)
- pycontrails.physics.constants.rho_ice = 917.0#
Density of ice \([kg \ m^{-3}]\)
- pycontrails.physics.constants.rho_msl = 1.225#
Standard atmospheric density at mean sea level (MSL) \([kg \ m^{-3}]\)
- pycontrails.physics.constants.solar_constant = 1361.0#
Average incident solar radiation, \([W \ m^{-2}]\) This value can range +/- 3% as the earth orbits the sun. From [Laboratory, 2022] citing [Paltridge et al., 1976]