The martian shallow crust has been studied through two subsurface sounding radars, MARSIS and SHARAD which operate at 3-5 and 20 MHz, respectively. The capability of radar to resolve the subsurface structures and the stratigraphy relates both on the radar features and the electromagnetic parameters of the shallow crust. For small grain size sediments, like clay minerals, the dielectric properties strongly affect the penetration depth of the radar signal. In this study, we measured several clayey samples, collected from various geological settings, with different mineralogy and water content using a Vector Network Analyzer (VNA) in the frequency range 1MHz-6GHz. The electrical properties were estimated as a function of temperature (200-298K) via the Nicolson-Ross-Weir algorithm using a coaxial-cage probe connected to the VNA. These measurements are used to interpret radar data in terms of depth penetration and surface echoes strength which could be affected by the temperature diurnal variation of martian surface.

Mattei, E., Lauro, S., L., C., A., B., L., M., Cosciotti, B., et al. (2014). Electromagnetic parameters measurements of clay soils for Mars radar sounding. In Ground Penetrating Radar (GPR), 2014 15th International Conference on [10.1109/ICGPR.2014.6970587].

Electromagnetic parameters measurements of clay soils for Mars radar sounding

MATTEI, ELISABETTA;LAURO, SEBASTIAN;COSCIOTTI, BARBARA;DI PAOLO, FEDERICO;PETTINELLI, Elena
2014-01-01

Abstract

The martian shallow crust has been studied through two subsurface sounding radars, MARSIS and SHARAD which operate at 3-5 and 20 MHz, respectively. The capability of radar to resolve the subsurface structures and the stratigraphy relates both on the radar features and the electromagnetic parameters of the shallow crust. For small grain size sediments, like clay minerals, the dielectric properties strongly affect the penetration depth of the radar signal. In this study, we measured several clayey samples, collected from various geological settings, with different mineralogy and water content using a Vector Network Analyzer (VNA) in the frequency range 1MHz-6GHz. The electrical properties were estimated as a function of temperature (200-298K) via the Nicolson-Ross-Weir algorithm using a coaxial-cage probe connected to the VNA. These measurements are used to interpret radar data in terms of depth penetration and surface echoes strength which could be affected by the temperature diurnal variation of martian surface.
2014
Mattei, E., Lauro, S., L., C., A., B., L., M., Cosciotti, B., et al. (2014). Electromagnetic parameters measurements of clay soils for Mars radar sounding. In Ground Penetrating Radar (GPR), 2014 15th International Conference on [10.1109/ICGPR.2014.6970587].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/159968
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