Universität zu Köln

Bergeot, Nicolas, Witasse, Olivier, Le Maistre, Sebastien, Blelly, Pierre-Louis, Kofman, Wlodek ORCID: 0000-0002-6744-8796, Peter, Kerstin, Dehant, Veronique and Chevalier, Jean-Marie (2019). MoMo: a new empirical model of the Mars ionospheric total electron content based on Mars Express MARSIS data. J. Space Weather Space Clim., 9. LES ULIS CEDEX A: EDP SCIENCES S A. ISSN 2115-7251

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Abstract

Aims: Several scientific landers and rovers have reached the Martian surface since the 1970s. Communication between the asset (i.e., lander or rover) and Mars orbiters or Earth antennas uses radio signals in UHF to X-band frequencies passing through the Mars' ionosphere. It is consequently necessary to take into account electron density variation in the Mars' ionosphere to correct the refraction of the signal transmitted. Methods: We developed a new empirical model of the Mars' ionosphere called MoMo. It is based on the large database of Total Electron Content (TEC) derived from the subsurface mode of the Mars Express MARSIS radar. The model provides vertical TEC as a function of solar zenith angle, solar activity, solar longitude and location. For validation, the model is compared with Mars Express radio occultation data as well as with the numerical model IPIM (IRAP Plasmasphere-Ionosphere Model). Results: We discussed the output of the model in terms of climatology behaviour of the Mars' ionosphere. The output of MoMo is then uses to quantify the impact of the Martian ionosphere for radio-science experiments. From our results, the effect is of the order of 10(-3) mm s(-1) in Doppler observables especially around sunrise and sunset. Consequently, this new model could be used to support the data analysis of any radio-science experiment and especially for present InSight RISE and futur ExoMars LARA instruments aiming at better understand the deep-interior of Mars.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Bergeot, Nicolas UNSPECIFIED UNSPECIFIED UNSPECIFIED Witasse, Olivier UNSPECIFIED UNSPECIFIED UNSPECIFIED Le Maistre, Sebastien UNSPECIFIED UNSPECIFIED UNSPECIFIED Blelly, Pierre-Louis UNSPECIFIED UNSPECIFIED UNSPECIFIED Kofman, Wlodek UNSPECIFIED orcid.org/0000-0002-6744-8796 UNSPECIFIED Peter, Kerstin UNSPECIFIED UNSPECIFIED UNSPECIFIED Dehant, Veronique UNSPECIFIED UNSPECIFIED UNSPECIFIED Chevalier, Jean-Marie UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-131328
DOI:	10.1051/swsc/2019035
Journal or Publication Title:	J. Space Weather Space Clim.
Volume:	9
Date:	2019
Publisher:	EDP SCIENCES S A
Place of Publication:	LES ULIS CEDEX A
ISSN:	2115-7251
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language DAYSIDE IONOSPHERE; PROFILES; DENSITY; FUTURE Multiple languages Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology & Atmospheric Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/13132