Infrared radiative transfer modeling and temperature retrievals with Py4CAtS (Python for Computational ATmospheric Spectroscopy)

Given the increasing number and quality of spectroscopic observations of (Earth-like) extrasolar planets, the detailed characterization of their atmosphere by means of remote sensing techniques is becoming increasingly important. Infrared radiative trans- fer models are mandatory for the data analysis, serving as forward model for the solution of the inverse problem. Here we present Py4CAtS - Python for Computational ATmospheric Spectroscopy, a re-implementation of a Fortran line-by-line code and demonstrate its use in the context of temperature retrievals of Earth-like exoplanets