Automatically Identifying Minerals from Martian Orbit
نویسنده
چکیده
Introduction The Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) is a very high resolution near infrared spectrometer currently orbiting Mars on board the Mars Reconnaissance Orbiter (MRO). Since each mineral has a unique spectral signature, it is possible to use the measurements from this instrument to identify minerals on the surface of Mars. This project describes a method[1] to derive the different mineral concentrations from a signal and shows the results of this processing on a dataset from Columbia Hills, the location of Spirit, the Mars Exploration Rover.
منابع مشابه
Searching at the right time of day: Evidence for aqueous minerals in Columbus crater with TES and THEMIS data
[1] The primary objective of the Thermal Emission Imaging System (THEMIS) experiment, which has been in orbit at Mars since early 2002, is to identify minerals associated with hydrothermal and subaqueous environments. Data from THEMIS have supported the presence of clays, silica-rich deposits, and chlorides but has not before provided definitive evidence for the presence of sulfates. This is an...
متن کاملAqueous Alteration in Martian Meteorites: Comparing Mineral Relations in Igneous-rock Weathering of Martian Meteorites and in the Sedimentary Cycle of Mars
Many of the minerals observed or inferred to occur in the sediments and sedimentary rocks of Mars, from a variety of Mars-mission spacecraft data, also occur in Martian meteorites. Even Martian meteorites recovered after some exposure to terrestrial weathering can preserve preterrestrial evaporite minerals and useful information about aqueous alteration on Mars, but the textures and textural co...
متن کاملMartian surface mineralogy from Observatoire pour la Minéralogie, l’Eau, les Glaces et l’Activité on board the Mars Express spacecraft (OMEGA/MEx): Global mineral maps
[1] After 2 years of operation the Observatoire pour la Minéralogie, l’Eau, les Glaces et l’Activité (OMEGA) imaging spectrometer on board Mars Express has acquired data coverage of the Martian surface with spatial resolution varying between 300 m and 4.8 km, depending on the pericenter altitude of the spacecraft’s elliptical orbit. We report the global surface distributions of some minerals us...
متن کاملSpectroscopic identification of carbonate minerals in the martian dust.
Thermal infrared spectra of the martian surface indicate the presence of small concentrations (approximately 2 to 5 weight %) of carbonates, specifically dominated by magnesite (MgCO3). The carbonates are widely distributed in the martian dust, and there is no indication of a concentrated source. The presence of small concentrations of carbonate minerals in the surface dust and in martian meteo...
متن کاملMeasurements of dielectric loss factors due to a Martian dust analog
[1] Radar signals can penetrate loose sediments such as dust, sand, and alluvium to reveal buried geologic structures obscured in visible and infrared images. In anticipation of data from instruments such as the MARSIS and SHARAD radar sounders and potential future imaging SAR and rover-mounted GPR instruments, measurements have been made to characterize electrical loss factors of a Martian dus...
متن کامل