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The Ma-Miss instrument performance, II: Band parameters of rocks powders spectra by Martian VNIR spectrometer

TitleThe Ma-Miss instrument performance, II: Band parameters of rocks powders spectra by Martian VNIR spectrometer
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2015
AuthorsDe Angelis, S., De Sanctis M.C., Ammannito E., Carli C., Di Iorio Tatiana, and Altieri F.
JournalPlanetary and Space Science
Volume117
Pagination329-344
ISSN00320633
KeywordsAbsorption spectroscopy, Boreholes, Drills, ExoMars, Grain size and shape, Infrared devices, Instrument performance, Mars, Ma_Miss, Minerals, Spectral parameters, Spectral performance, Spectrometers, Spectroscopic measurements, Stratigraphy, Visible and near infrared, Volcanic rocks, Volcanoes
Abstract

The Ma-Miss instrument (Mars Multispectral Imager for Subsurface Studies, Coradini et al. (2001)) is a Visible and Near Infrared miniaturized spectrometer that will observe the Martian subsurface in the 0.4-2.2 μm spectral range. The instrument will be entirely hosted within the Drill of the ExoMars-2018 Pasteur Rover: it will allow analyzing the borehole wall excavated by the Drill, at different depths, down to 2 m. The aim will be to investigate and characterize the mineralogy and stratigraphy of the shallow Martian subsurface. A series of spectroscopic measurements have been performed in order to characterize the spectral performances of the laboratory model of the instrument (breadboard). A set of six samples have been analyzed. Each sample (four volcanic rocks, a micritic limestone and a calcite) has been reduced in particulate form, ground, sieved and divided into nine different grain sizes in the range d<0.02÷0.8 mm. Spectroscopic measurements have been performed on all samples using two distinct experimental setup: (a) the Ma-Miss breadboard, and (b) the Spectro-Goniometer setup, both in use in the laboratory at INAF - IAPS. In a previous paper spectral parameters such as the continuum slope and the reflectance level of the spectra have been discussed (De Angelis et al., 2014). In this work we focus our discussion on absorption band parameters (position, depth, area, band slope and asymmetry). We analyzed/investigated the absorption features at 1 μm for the volcanic samples and at 1.4, 1.9 and 2.2 μm for the two carbonate samples. Band parameters have been retrieved from spectra measured with both experimental setup and then compared. The comparison shows that band parameters are mutually consistent: band centers (for carbonate samples) are similar within few percent, and band depth and area values (for carbonates) show consistent trends vs. grain size (decreasing towards coarser grains) for most of samples. © 2015 Elsevier Ltd. All rights reserved.

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84945488234&doi=10.1016%2fj.pss.2015.07.002&partnerID=40&md5=e757d6cc15993b2891da8b99237515f4
DOI10.1016/j.pss.2015.07.002
Citation KeyDeAngelis2015329