Observations of Mercury’s Surface-Bounded Exosphere from Orbit: Results from the Mercury Atmospheric and Surface Composition Spectrometer aboard the MESSENGER Spacecraft

William E McClintock1, Matthew H Burger2, Timothy A Cassidy1, Rosemary M Killen3, Aimee W Merkel4, Menelaos Sarantos5, Sean C Solomon6 and Ronald J Vervack Jr7, (1)Laboratory for Atmospheric and Space Physics, Boulder, CO, United States, (2)STScI, Baltimore, MD, United States, (3)NASA Goddard Space Flight Center, 695, Greenbelt, MD, United States, (4)University of Colorado at Boulder, Laboratory for Atmospheric and Space Physics, Boulder, United States, (5)NASA Goddard Space Flight Center, Geospace Physics Laboratory, Greenbelt, MD, United States, (6)Columbia University of New York, Palisades, NY, United States, (7)Applied Physics Laboratory Johns Hopkins, Laurel, MD, United States