Intensity of nightside MARSIS AIS surface reflections and implications for low-altitude ionospheric densities

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F15%3A10319443" target="_blank" >RIV/00216208:11320/15:10319443 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1002/2014JA020888" target="_blank" >http://dx.doi.org/10.1002/2014JA020888</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/2014JA020888" target="_blank" >10.1002/2014JA020888</a>

Result language
angličtina
Original language name
Intensity of nightside MARSIS AIS surface reflections and implications for low-altitude ionospheric densities
Original language description
Spacecraft radar sounding signals at frequencies higher than the ionospheric peak plasma frequency are not reflected by the ionosphere. Instead, they make it to the ground where they are reflected by the planetary surface. We analyze the intensity of thesurface reflections measured by the Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) ionospheric radar sounder on board the Mars Express spacecraft. Apart from the surface reflectivity and the spacecraft altitude, the detected intensity of surface reflections is controlled primarily by the signal attenuation during the ionospheric propagation. We focus on the nightside region, where the ionospheric densities in the main layer are too low to cause a significant attenuation and allow sampling of the surface reflections at frequencies down to 3MHz. The attenuation occurs mainly at altitudes below 100km, where the electron-neutral collision frequency is a maximum. The intensity of surface reflections can thus serve as a
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BL - Plasma physics and discharge through gases
OECD FORD branch
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Project
<a href="/en/project/LH13031" target="_blank" >LH13031: Ionosphere of Mars: Radar soundings by the Mars Express spacecraft</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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