pyrtlib.utils.constants#

pyrtlib.utils.constants(name: Optional[str] = None) → Union[Tuple[float, str], List]#

This routine will provide values and units for all the universal constants necessary to pyrtlib.

Parameters:: name (Optional[str], optional) – String specifying which constant is needed. Defaults to None.

string	description
‘avogadro’	Avogadro number [mol-1]
‘boltzmann’	Boltzmann constant [J K-1]
‘EarthRadius’	Earth radius [km]
‘light’	Light speed [m s-1]
‘Np2dB’	Neper to Decibel [dB/Np]
‘planck’	Planck constant [J Hz-1]
‘Rdry’	Gas constant of dry air [J kg-1 K-1]
‘Rwatvap’	Gas constant of water vapor [J kg-1 K-1]
‘R’	Gas constant [J mol-1 K-1]
‘Tcosmicbkg’	Cosmic Background Temperature [K]

Raises:: ValueError – Raises error wheter no costant available.
Returns:: Union[Tuple[float, str], List] Numerical Value of the asked constant and string specifying which units are used

References

Note

# +/- 0.017 [K] Cosmic Background Temperature (see ref. 2) Tcosmicbkg = 2.736;

Examples using `pyrtlib.utils.constants`#