P Jonathan Gero, University of Wisconsin Madison, Space Science and Engineering Center, Madison, WI, United States, Robert O Knuteson, University of Wisconsin, Madison, WI, United States, Nicholas R Nalli, IMSG, Inc., at National Oceanic and Atmospheric Administration (NOAA), College Park, MD, United States and James Jung, Joint Center for Satellite Data Assimilation, Camp Springs, MD, United States