torchMWRT.consts

Physical constants used by torchMWRT.

The values for radiative-transfer constants are aligned with the original pyrtlib.utils.constants definitions. Thermodynamic constants are kept as class attributes for direct access across the package.

References

• Mohr et al., 2015

• Janssen, 1993, p. 12.

Attributes

T_0	Reference temperature [K].
R_d	Specific gas constant of dry air [J kg-1 K-1].
R_v	Specific gas constant of water vapor [J kg-1 K-1].
eps	Ratio R_d / R_v [1].
EarthRadius	Earth radius [m].
Tcosmicbkg	Cosmic background temperature [K].
planck	Planck constant [J Hz-1].
boltzmann	Boltzmann constant [J K-1].
light	Speed of light in vacuum [m s-1].

torchMWRT.consts.T_0 = 273.15

Reference temperature [K].

torchMWRT.consts.R_d = 287.058

Specific gas constant of dry air [J kg-1 K-1].

torchMWRT.consts.R_v = 461.52

Specific gas constant of water vapor [J kg-1 K-1].

torchMWRT.consts.eps = 0.6219838793551742

Ratio R_d / R_v [1].

torchMWRT.consts.EarthRadius = 6370949.0

Earth radius [m].

torchMWRT.consts.Tcosmicbkg = 2.728

Cosmic background temperature [K].

torchMWRT.consts.planck = 6.626075499999999e-34

Planck constant [J Hz-1].

torchMWRT.consts.boltzmann = 1.3806579999999998e-23

Boltzmann constant [J K-1].

torchMWRT.consts.light = 299792458.0

Speed of light in vacuum [m s-1].

References

[Janssen, 1993]

Michael A. Janssen, editor. Atmospheric Remote Sensing by Microwave Radiometry. John Wiley & Sons, New York, 1993. ISBN 0-471-62891-3.

[Mohr et al., 2015]

Peter J. Mohr, Barry N. Taylor, and David B. Newell. The 2014 codata recommended values of the fundamental physical constants. National Institute of Standards and Technology (NIST), Gaithersburg, MD, 2015. Web Version 7.0 (updated 25 June 2015). Available at https://physics.nist.gov/constants. Accessed 2026-02-18. URL: https://physics.nist.gov/constants.