Hailan Wang, Science Systems and Applications, Inc., Lanham, MD, United States, Anthony DeAngelis, Science Systems and Applications, Inc., Lanham, United States, Randal D Koster, NASA Goddard SFC, Greenbelt, MD, United States, Yehui Chang, NASA/GSFC, Greenbelt, MD, United States and Siegfried D Schubert, NASA Goddard Space Flight Center, Greenbelt, MD, United States