radis.spectrum.equations module
Created on Mon Nov 13 21:58:47 2017.
@author: erwan
Formula to calculate most spectral quantities
Are stored here all equations that need to be used by both the factory (to
generate the spectrum) or the spectrum class (to recompute some quantities
in post processing)
-
abscoeff2xsection(abscoeff_cm1, Tgas_K, pressure_Pa, mole_fraction)[source]
Convert Absorption coefficient (cm-1) to Cross-section (cm2)
- Parameters
abscoeff_cm (cm-1)
Tgas_K (K)
pressure_Pa (Pa)
mole_fraction (0-1)
- Returns
xsection
- Return type
cm2
-
calc_radiance(wavenumber, emissivity, Tgas, unit='mW/sr/cm2/nm')[source]
Derive radiance (\(mW/cm^2/sr/nm\)) from the emissivity.
\[I(\lambda) = \epsilon(\lambda) \cdot L_0(\lambda, T)\]
- Returns
radiance – unless unit is different
- Return type
array in \(mW/sr/cm2/nm\)
