Correction of the ionospheric distortion on the MARSIS surface sounding echoes

Details Correction of the ionospheric distortion on the MARSIS surface sounding echoes Correction of the ionospheric distortion on the MARSIS surface sounding echoes

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008p%26ss...56..917m&link_type=abstract

Planetary and Space Science, Volume 56, Issue 7, p. 917-926.

Computer Science

Sound

9

Scientific paper

Mars Advanced Radar for Subsurface and Ionospheric Sounding (MARSIS) on the Mars Express (MEX) spacecraft has made numerous measurements of the Martian surface and subsurface. However, all of these measurements are distorted by the ionosphere and must be compensated before any analysis. We have developed a technique to compensate for the ionospheric distortions. This technique provides a powerful tool to derive the total electron content (TEC) and other higher-order terms of the limited expansion of the plasma dispersion function that are related to overall shape of the electron column profile. The derived parameters are fitted by using a Chapman model to derive ionospheric parameters like n0, electron density primary peak (maximum for solar zenith angle (SZA) equal 0), and the neutral height scale H. Our estimated ionospheric parameters are in good agreement with Mars Global Surveyor (MGS) radio-occultation data. However, since MARSIS does not have the observation geometry limitations of the radio occultation measurements, our derived parameters extend over a large range of SZA for each MEX orbit. The first results from our technique have been discussed by Safaeinili et al. [2007, Estimation of the total electron content of the Martian ionosphere using radar sounder surface echoes. Geophys. Res. Lett. 34, L23204, doi:10.1029/2007GL032154].

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