Benjamin Clouser¹, Clare E. Singer², Sergey M. Khaykin³, Martina Kraemer⁴, Alexey Lykov⁵, Silvia Bucci⁶, Bernard Legras⁷, Stephan Borrmann⁸, Francesco Cairo⁹, Velentin Mitev¹⁰, Renaud Matthey¹¹, Christian Rolf¹², Alexey Ulanovsky¹³, Fabrizio Ravegnani⁹, Silvia Viciani¹⁴, Francesco D’Amato¹⁴, C Michael Volk¹⁵, Vladimir A Yushkov¹³, Fred Stroh¹⁶ and Elisabeth J Moyer¹, (1)University of Chicago, Geophysical Sciences, Chicago, IL, United States, (2)University of Chicago, Department of Physics, Chicago, IL, United States, (3)LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales, LATMOS, Paris Cedex 05, France, (4)Forschungszentrum Juelich, Juelich, Germany, (5)Central Aerological Observatory of RosHydroMet, Dolgoprudny, Russia, (6)National Research Council (CNR), Institute of Atmospheric Sciences and Climate (ISAC), Rome, Italy, (7)Laboratoire de Météorologie Dynamique ENS, Paris, France, (8)Johannes Gutenberg University, Max Planck Institute for Chemistry, Particle Chemistry, Mainz, Germany, (9)Institute of Atmospheric Science and Climate, ISAC-CNR, Rome, Italy, (10)Centre Suisse d’Electronique et de Microtechnique Neuchatel, Neuchatel, Switzerland, (11)LTF-University of Neuchatel, Neuchatel, Switzerland, (12)Forschungszentrum Juelich, IEK-7, Juelich, Germany, (13)Central Aerological Observatory of RosHydroMet, Moscow, Russia, (14)CNR-INO National Institute of Optics, Florence, Italy, (15)Bergische Univ. Wuppertal, Wuppertal, Germany, (16)Forschungszentrum Juelich, Jülich, Germany