Greenhouse Gas and Satellite Methods group has developed a number of scientific software for analyzing satellite observations of the atmosphere. Here is a list of publicly available codes

ARSCA: Atmospheric Radiation Simulation Computation Application

ARSCA is a Python interface for creating input files for radiative transfer simulators and running them. It contains two polarized radiative transfer models, single-scattering Raysca and backward Monte Carlo model Siro.

Code is available under MIT license on Github: https://github.com/amikko/arsca

TURSCA: Transmittance calcUlator with Radiative Scattering Coupling Approach

TURSCA is a monochromatic scalar 3D radiative transfer model, used for rapid simulation of imaging instrument observations in multiple scattering atmospheres.

Code is available under MIT license on Github: https://github.com/amikko/tursca