Your query was:

withers

HR: 1020h
AN: SA12A-01
TI: Radio Sounding of the Martian and Venusian Ionospheres (Invited)
AU: *Paetzold, M
EM: mpaetzol@uni-koeln.de
AF: RIU - Planetenforschung, Koeln, Germany
AU: Haeusler, B
EM: bernd.haeusler@unibw-muenchen.de
AF: Universität der Bundeswehr, Munich, Germany
AU: Bird, M K
EM: mbird@astro.uni-bonn.de
AF: RIU - Planetenforschung, Koeln, Germany
AU: Peter, K
EM: peterk@uni-koeln.de
AF: RIU - Planetenforschung, Koeln, Germany
AU: Tellmann, S
EM: silvia.tellmann@uni-koeln.de
AF: RIU - Planetenforschung, Koeln, Germany
AU: Tyler, G L
EM: len.tyler@stanford.edu
AF: Stanford University, Stanford, CA, USA
AU: Withers, P
EM: withers@bu.edu
AF: Space Science Section, Boston University, Boston, MA, USA
AB: The Mars Express Radio Science Experiment MaRS and the radio science experiment Vera on Venus Express sound the ionospheres of Mars and Venus, respectively, at two frequencies in the microwave band and cover altitudes from the base of the ionosphere at 80 km (100 km at Venus) to the ionopause at altitudes between 300 km and 600 km. In general, both ionospheres consists of a lower layer M1 (V1 at Venus) at about 110 km (115 km), and the main layer M2 (V2) at about 135 km (145 km) altitude, both formed mainly by solar radiation at X-ray and EUV, respectively. The specific derivation and interpretation of the vertical electron density profiles at two radio frequencies from radio sounding is demonstrated in detail. Cases of quiet and disturbed ionospheric electron density profiles and cases of potential misinterpretations are presented. The behavior of the peak densities and peak altitudes of both ionospheres as a function of solar zenith angle and phase of the solar cycle as seen with Mars Express and Venus Express will be compared with past observations, models and conclusions.
DE: [2459] IONOSPHERE / Planetary ionospheres
DE: [5435] PLANETARY SCIENCES: SOLID SURFACE PLANETS / Ionospheres
DE: [6295] PLANETARY SCIENCES: SOLAR SYSTEM OBJECTS / Venus
DE: [6929] RADIO SCIENCE / Ionospheric physics
SC: SPA-Aeronomy (SA)
MN: 2011 Fall Meeting