Ongoing activities at LMD to prepare the CH4 space lidar mission MERLINFabien Gibert, Raymond Armante, Vincent Cassé, Olivier Chomette, Cyril Crevoisier, Thibault Delahaye, Dimitri Edouart, Frédéric Nahan and Ha TranEPJ Web Conf., 362 (2026) 08011DOI: https://doi.org/10.1051/epjconf/202636208011