Gangkai Poh, NASA Goddard Space Flight Center, Greenbelt, MD, United States, Jared R Espley, Goddard Space Flight Center, Greenbelt, MD, United States, Jacob Gruesbeck, University of Maryland College Park, College Park, MD, United States, Gina A DiBraccio, University of Michigan, Ann Arbor, MI, United States and Norberto Romanelli, LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales, Paris Cedex 05, France