Brent Holben¹, Thomas F Eck², David Matthew Giles³, Mikhail G Sorokin³, Joel Schafer⁴, Alexander Smirnov⁴, Alexander Sinyuk⁴, Ilya Slutsker³, Anthony D LaRosa⁵, Jason Kraft⁶, Philippe Goloub⁷, Luc Blarel⁷, Thierry Podvin⁸, Gael Dubois⁸, Lelia Proniewski⁹, Ioana Popovici⁸, Aliaksandr Lapionak⁸, Scott C. Herndon¹⁰, Robert J Yokelson¹¹, Luigi Boschetti¹², Peter Gag¹³, Bryce Nordgren¹⁴, James R Campbell¹⁵ and Ellsworth Judd Welton¹, (1)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (2)Nasa Goddard SFC, Greenbelt, MD, United States, (3)Science Systems and Applications, Inc., Lanham, MD, United States, (4)Science Systems and Applications, Inc., Greenbelt, MD, United States, (5)Science Systems and Applications, Inc., Lanham, United States, (6)Fibertek Inc., Herndon, VA, United States, (7)Laboratoire d'Optique Atmosphérique, Univ. Lille, CNRS, UMR 8518, Lille, France, (8)University of Lille, Lille, France, (9)Cimel Electronique, Paris, France, (10)Aerodyne Research Inc, Billerica, MA, United States, (11)University of Montana, Department of Chemistry, Missoula, MT, United States, (12)University of Idaho, Department of Forest, Rangeland and Fire Sciences, Moscow, ID, United States, (13)University of Idaho, Cascade, United States, (14)US Forest Service Missoula, Missoula, MT, United States, (15)Naval Research Laboratory, Monterey, CA, United States