A Novel Satellite Mission Concept for Upper Air Water Vapour, Aerosol and Cloud Observations Using Integrated Path Differential Absorption LiDAR Limb Sounding by Hoffmann, A, Clifford, D, Aulinas, J, Carton, J, Deconinck, F, Esen, B, Husing, J, Kern, K, Kox, S, Krejci, D, Krings, T, Lohrey, S, Romano, P, Topham, R, Weitnauer, C