Lutz Rastaetter¹, Therese Moretto², Michael Hesse², Maria M Kuznetsova³, Gabor Toth⁴, Joachim Raeder⁵, John Lyon⁶ and Ilja J Honkonen⁷, (1)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (2)University of Bergen, Bergen, Norway, (3)NASA/GSFC, Greenbelt, MD, United States, (4)University of Michigan, Ann Arbor, MI, United States, (5)University of New Hampshire, Institute for the Study of Earth, Oceans, and Space, Durham, NH, United States, (6)Dartmouth College, Hanover, NH, United States, (7)Finnish Meteorological Institute, Helsinki, Finland