Thierry Phulpin is a senior expert in space missions for atmospheric sciences. He has been a researcher at Météo-France, Lannion, then program scientist on missions for meteorology (IASI, IASI-NG) and air quality (TRAQ, 3MI) at the CNES, Toulouse. Didier Renaut is a meteorological engineer, now retired. He made his career at Météo-France, Paris, then at the CNES, Paris, where he was in charge of meteorological and climate programs. He has also worked in the field of scientific publishing. Hervé Roquet is a meteorological engineer at Météo-France. After several years at the Space Meteorology Center of Météo-France in Lannion, he joined the Higher Education and Research Department of Météo-France in Saint-Mandé in 2017, where he is the deputy director. Claude Camy-Peyret is currently emeritus scientist at Institut Pierre Simon Laplace, Paris. He is also a retired research director at the CNRS, Paris. From 1996 to 2008 he was the head of LPMAA at Sorbonne Université, Paris.