ACTRIS: https://www.actris.eu
ESA-EarthCARE: https://www.esa.int/Applications/Observing_the_Earth/FutureEO/EarthCARE
HALO-South: https://halo-research.de/sience/future-missions/halo-south/
NASA-PACE: https://pace.gsfc.nasa.gov
NASA-ARCSIX: https://espo.nasa.gov/ARCSIX/content/ARCSIX