David Matthew Giles¹, Ilya Slutsker¹, Joel Schafer², Mikhail G Sorokin¹, Alexander Smirnov², Thomas F Eck³, Brent Holben⁴ and Ellsworth Judd Welton⁴, (1)Science Systems and Applications, Inc., Lanham, MD, United States, (2)Science Systems and Applications, Inc., Greenbelt, MD, United States, (3)Nasa Goddard SFC, Greenbelt, MD, United States, (4)NASA Goddard Space Flight Center, Greenbelt, MD, United States