RadSim v4.0 has been released. This has been updated to work with RTTOV v14.0. New features include: support for ingest of the new NWP SAF 137L CAMS profile dataset, and also the older 60L MACC and CAMS profile datasets; support for ingest of ICON-ART model fields including the aerosol species supported by RTTOV; support for nearest-neighbour instead of (bi)linear spatial and temporal interpolation; support for Zeeman-enabled simulations; support for obs data files in netCDF format; ecCodes is now an optional dependency, only required if ingesting model fields in GRIB format. A full list of updates is here.