Timothy Berkoff, NASA Langley Research Center, Hampton, VA, United States, Guillaume Gronoff, NASA LaRC, Hampton, VA, United States, Barry Baker, NOAA ARL, College Park, United States, Pius Lee, NOAA, Air Resources Laboratory, Boulder, CO, United States, Joel Dreessen, Maryland Department of the Environment, Air Monitoring Program, Baltimore, MD, United States and John Sullivan, NASA Goddard Space Flight Center, Greenbelt, MD, United States