Radiance Simulator v2.2 has been released. The main new features are: support for RTTOV v12.3, simulations for all solar-affected channels supported by RTTOV including use of the BRDF atlas and the MFASIS fast visible cloud parameterisation, clear-sky simulations using the Principal Components-based models PC-RTTOV and HTFRTC, ingest of DWD ICON model fields in GRIB format, ingest of ECMWF data in netCDF format, and the ability to modify the background CO2 profile used in the simulations.