Physics – Plasma Physics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsa11a..04g&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #SA11A-04
Physics
Plasma Physics
[3360] Atmospheric Processes / Remote Sensing, [5408] Planetary Sciences: Solid Surface Planets / Aurorae And Airglow, [6225] Planetary Sciences: Solar System Objects / Mars, [7894] Space Plasma Physics / Instruments And Techniques
Scientific paper
The determination of the density and composition of the Mars' upper atmosphere is necessary to understand the evolution of the planet, its interaction with the solar wind, and to optimize aerobraking/landing activities. One of the most promising techniques is remote sensing: the monitoring instruments can be outside the dense layers of the atmosphere, and therefore the satellite lifetime is not limited by atmospheric drag, leading to the possibility of multi-martian years/full solar cycle monitoring. The SPICAM instrument onboard Mars Express acquires limb spectrum in the UV range (120-300 nm). Using these measurements, it is possible to adapt emission models to perform remote sensing of the Martian atmosphere. However, the uncertainties of these models cannot not be neglected. Therefore, it is important to understand and compute them before giving conclusions on the underlying densities. In this work, we present recent modeling of the ionizations and emissions, including their linked uncertainties, computed with the Aeroplanets model coupled with the AtMoCiad database. We show the uncertainties in the retrived densities computed through the inversion of the main lines and bands observed in the SPICAM UV channel, notably O(1S), CO(a3Pi), and CO2+(B).
Gronoff Guillaume
Lilensten Jean
Lillis Robert J.
Mertens Chris J.
Simon Wedlund Cyril
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