Thomas F Eck¹, Jeffrey S. Reid², Pawan Gupta³, Elena Spinei Lind⁴, Alexander Siniuk⁵, Antti T Arola⁶, Ilya Slutsker⁷, Brent Holben¹, Philippe Goloub⁸, Joel Schafer⁹, Mikhail G Sorokin⁷, Alexander Smirnov⁷, Hongbin Yu⁵, Dongchul Kim¹⁰, Jason Kraft¹¹, Elizabeth A Reid² and Norman T. O'Neill¹², (1)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (2)Naval Research Laboratory, Marine Meteorology Division, Monterey, United States, (3)NASA GSFC, Greenbelt, United States, (4)Virginia Polytechnic Institute and State University, Electrical and Computer Engineering, Blacksburg, United States, (5)NASA Goddard Space Flight Center, Greenbelt, United States, (6)Finnish Meteorological Institute, Helsinki, Finland, (7)Science Systems and Applications, Inc., Lanham, MD, United States, (8)Laboratoire d'Optique Atmosphérique, UMR 8518, CNRS, University of Lille, Lille, France, (9)Science Systems and Applications, Inc., Greenbelt, MD, United States, (10)Goddard Earth Sciences and Technology Center, Greenbelt, United States, (11)Fibertek Inc., Herndon, VA, United States, (12)University of Sherbrooke, Géomatique Appliquée, Sherbrooke, QC, Canada