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withers

HR: 10:20h
AN: P32A-01
TI: The Structure of the Mars Ionosphere
AU: * Pätzold, M
EM: paetzold@geo.uni-koeln.de
AF: Rheinisches Institut fuer Umweltforschung, Abt. Planetenforschung, Universitaet zu Koeln, Aachener Str. 209, Koeln, 50931, Germany
AU: Withers, P
EM: withers@bu.edu
AF: Center of Space Physics, Boston University, Commonwealth Ave., Boston, MA 02215, United States
AU: Tellmann, S A
EM: tellmann@geo.uni-koeln.de
AF: Rheinisches Institut fuer Umweltforschung, Abt. Planetenforschung, Universitaet zu Koeln, Aachener Str. 209, Koeln, 50931, Germany
AU: Mendillo, M
EM: mendillo@bu.edu
AF: Center of Space Physics, Boston University, Commonwealth Ave., Boston, MA 02215, United States
AU: Peter, K
EM: peter@geo.uni-koeln.de
AF: Rheinisches Institut fuer Umweltforschung, Abt. Planetenforschung, Universitaet zu Koeln, Aachener Str. 209, Koeln, 50931, Germany
AU: Häusler, B
EM: bernd.haeusler@unibw-muenchen.de
AF: Institut fuer Raumfahrttechnik, Universitaet der Bundeswehr Muenchen, Heisenbergweg 150, Neubiberg, 85577, Germany
AU: Hinson, D P
EM: phinson@stanford.edu
AF: Dep. of Electrical Engineering, Stanford University, Serra Mall, Stanford, CA 94305, United States
AU: Tyler, G L
EM: len@stanford.edu
AF: Dep. of Electrical Engineering, Stanford University, Serra Mall, Stanford, CA 94305, United States
AB: The Mars Express Radio Science Experiment MaRS sounds the ionosphere of Mars at microwavelengths and covers altitudes from the base of the ionosphere at 80 km to the ionopause at altitudes between 300 km and 800 km. The Mars ionosphere consists of a lower secondary layer M1 at about 110 km, and the main layer M2 at about 135 km altitude, both formed by solar radiation at X-ray and EUV, respectively. The precise and detailed observations of the Mars Express radio science experiment indicates the presence of another layer M3 in the topside above the main layer M2 with a shape of a Chapman function as the transition region between the photochemically induced and Chapman-like M1 and M2 layers and the transport dominated highly dynamical topside region above 200 km altitude. Sporadically, a region of enhanced ionisation below the M1 layer can be observed which is caused by the infall of meteors in the atmosphere.
DE: 2459 Planetary ionospheres (5435, 5729, 6026)
SC: Planetary Sciences [P]
MN: 2007 Fall Meeting