This project includes:
Interactive examples to calculate infrared spectra of molecules with RADIS <http://radis.readthedocs.io/>__, a convenient way to have access to HITRAN online without any installation.
Static examples of fitting algorithm built around RADIS <http://radis.readthedocs.io/>__
(new) RADIS-lab <https://github.com/radis/radis-lab>__A full online environment for advanced spectrum processing and comparison with experimental data
.. image:: https://user-images.githubusercontent.com/16088743/103448773-7d8f0200-4c9e-11eb-8bf1-ce3385519b77.png :target: https://user-images.githubusercontent.com/16088743/103448773-7d8f0200-4c9e-11eb-8bf1-ce3385519b77.png :alt: radis-lab-wip-02-01-21
Start on radis.github.io/radis-lab/ <https://radis.github.io/radis-lab>__
.. image:: https://mybinder.org/badge.svg :target: https://notebooks.gesis.org/binder/v2/gh/radis/radis-lab/main?urlpath=lab/tree/welcome.ipynb :alt: https://notebooks.gesis.org/binder/v2/gh/radis/radis-lab/main?urlpath=lab/tree/welcome.ipynb
Run RADIS interactively directly from the browser. No installation needed!
spectrum.ipynb <spectrum.ipynb>_
Manipulate a Spectrum <http://radis.readthedocs.io/en/latest/source/radis.spectrum.spectrum.html#radis.spectrum.spectrum.Spectrum>_ object:
.. image:: https://mybinder.org/badge.svg :target: https://mybinder.org/v2/gh/radis/radis-examples/master?filepath=spectrum.ipynb :alt: https://mybinder.org/v2/gh/radis/radis-examples/master?filepath=spectrum.ipynb
first_example.ipynb <first_example.ipynb>_
Calculate CO equilibrium and nonequilibrium spectra:
.. image:: https://mybinder.org/badge.svg :target: https://mybinder.org/v2/gh/radis/radis-examples/master?filepath=first_example.ipynb :alt: https://mybinder.org/v2/gh/radis/radis-examples/master?filepath=first_example.ipynb
online_fitting.ipynb <online_fitting/online_fitting.ipynb>_ (JupyterLab)
Import experimental spectra in an online JupyterLab instance and start fitting them!
.. image:: https://mybinder.org/badge.svg :target: https://mybinder.org/v2/gh/radis/radis-examples/master?urlpath=lab/tree/online_fitting/online_fitting.ipynb :alt: https://mybinder.org/v2/gh/radis/radis-examples/master?urlpath=lab/tree/online_fitting/online_fitting.ipynb
radis_online.ipynb <radis_online.ipynb>_
Start a bare RADIS online session:
.. image:: https://mybinder.org/badge.svg :target: https://mybinder.org/v2/gh/radis/radis-examples/master?filepath=radis_online.ipynb :alt: https://mybinder.org/v2/gh/radis/radis-examples/master?filepath=radis_online.ipynb
Install RADIS <https://radis.readthedocs.io/en/latest/install.html#install>_
then run these examples locally.
A 3 temperature fitting example reproducing the validation case of Klarenaar 2017 [1], who calculated a transmittance spectrum from the initial data of Dang 1973 [2], with a 1 rotational temperature + 3 vibrational temperature (Treanor distributions) model
.. image:: docs/multi-temperature-fit.gif
CO2 Energies are calculated from Dunham developments in an uncoupled harmonic
oscillator - rigid rotor model. The example is based on one of RADIS validation cases <https://github.com/radis/radis/tree/master/radis/test/validation>.
It makes use of the RADIS Spectrum <http://radis.readthedocs.io/en/latest/#the-spectrum-class>
class and the associated compare and load functions
.. [1] Klarenaar et al 2017, "Time evolution of vibrational temperatures in a CO2 glow discharge measured with infrared absorption spectroscopy" doi/10.1088/1361-6595/aa902e
.. [2] Dang et al 1982, "Detailed vibrational population distributions in a CO2 laser discharge as measured with a tunable diode laser" doi/10.1007/BF00694640
Code is available in the fit_klarenaar_validation_case.py file <multi-temperature-fit/fit_klarenaar_validation_case.py>__
An example where we use RADIS to calculate the upward-radiation of the Earth for different CO2 mole fractions in the atmosphere, based on the simple Standard Atmosphere Model. The difference evidences the radiative forcing of CO2.
.. image:: ex_radiative_forcing_co2/out/atmosphere_co2_column.png
Code is available in the radiative_forcing_co2.py file <ex_radiative_forcing_co2/radiative_forcing_co2.py>__
The absorption coefficient of all HITRAN species is calculated in plot_all_hitran_spectra.py <https://github.com/radis/radis-examples/blob/master/hitran_spectra/plot_all_hitran_spectra.py>__ at 300 K, 1 atm for the first isotope.
For instance:
.. image:: hitran_spectra/out/0%20-%20H2O%20infrared%20spectrum.png :width: 600 :alt: Water H2O infrared absorption coefficient
.. image:: hitran_spectra/out/1%20-%20CO2%20infrared%20spectrum.png :width: 600 :alt: Carbon Dioxide CO2 infrared absorption coefficient
.. image:: hitran_spectra/out/5%20-%20CH4%20infrared%20spectrum.png :width: 600 :alt: Methane CH4 infrared absorption coefficient
All other species can be found on the RADIS website <https://radis.readthedocs.io/en/latest/examples/hitran-spectra.html>__