Coordinated analyses of orbital and Spirit Rover data to characterize surface materials on the cratered plains of Gusev Crater, Mars

Details Coordinated analyses of orbital and Spirit Rover data to characterize surface materials on the cratered plains of Gusev Crater, Mars Coordinated analyses of orbital and Spirit Rover data to characterize surface materials on the cratered plains of Gusev Crater, Mars

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007jgre..11212s90l&link_type=abstract

Journal of Geophysical Research, Volume 112, Issue E12, CiteID E12S90

Other

11

Planetary Sciences: Solid Surface Planets: Surface Materials And Properties, Planetary Sciences: Solid Surface Planets: Remote Sensing, Planetary Sciences: Solid Surface Planets: Physical Properties Of Materials

Scientific paper

Comparison of the Mars Exploration Rover Spirit's Pancam (0.4 to 1.0 μm) and Mars Express Observatoire pour la Mineralogie l'Eau, les Glaces et l'Activité (OMEGA) (0.4 to 2.5 μm) spectral reflectance data over Spirit's traverses shows that Gusev cratered plains are dominated by nanophase ferric-oxide-rich dust covering weakly altered basaltic sands. This interpretation is also consistent with both observations from OMEGA data covering plains beyond the traverse region and interpretations of data from the other payload instruments on the Spirit Rover. OMEGA observations of relatively low albedo regions where dust has presumably been stripped by dust devils show negative spectral reflectance slopes from 1.5 to 2.5 μm and moderately masked spectral features which are indicative of olivine or pyroxene. High-albedo regions north and south of the Spirit landing site have flat spectral reflectance slopes and few spectral features, although all spectra have a nanophase ferric-oxide absorption edge between 0.4 and 0.75 μm. Comparison of THEMIS-derived thermal inertia values with OMEGA-derived spectral parameters shows that although the dust cover can be optically thick (0.4 to 2.5 μm wavelength region) in some areas, it is not thick enough (~1 cm) to mask the thermal inertia of the underlying substrate for areas included in this study.

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