RADIS describes itself as ‘a fast line-by-line code for high resolution infrared molecular spectra’. My project focussed on adding support for atomic line databases to RADIS, which has up till now catered only for molecular databases. Atomic lines differ significantly from molecular lines in how they are affected by Lorentzian broadening and how non-equilibrium spectra are handled.

The main goal was adding support for the Kurucz atomic database, which is now complete. This laid the basic structure for adding new atomic databases, and a PR is now open for adding NIST.