MAVEN Observations of Ionopause-like Density Gradients in the Martian Ionosphere

Marissa F. Vogt1, Paul Withers2, Paul R Mahaffy3, Mehdi Benna4, Dr. Meredith K Elrod5, Jasper S Halekas6, Laila Andersson7, John E P Connerney8, Jared R Espley3, David L Mitchell9, Christian Xavier Mazelle10 and Bruce Martin Jakosky11, (1)Boston University, Center for Space Physics, Boston, United States, (2)Boston University, Boston, United States, (3)NASA Goddard Space Flight Center, Greenbelt, United States, (4)University of Maryland Baltimore County, Center for Space Sciences and Technology, Baltimore, United States, (5)University of Maryland College Park, Astronomy Department, College Park, United States, (6)University of Iowa, Department of Physics and Astronomy, Iowa City, IA, United States, (7)University of Colorado at Boulder, Boulder, CO, United States, (8)Space Research Corporation, Annapolis, United States, (9)University of California Berkeley, Space Sciences Laboratory, Berkeley, CA, United States, (10)University Paul Sabatier Toulouse III, Toulouse Cedex 09, France, (11)Laboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder, United States