Computer Science – Performance
Scientific paper
Jul 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000came.work..279s&link_type=abstract
Concepts and Approaches for Mars Exploration, p. 279
Computer Science
Performance
Mars Missions, Prototypes, Chemical Composition, Spacecraft Instruments, Mars Surface Samples, Mission Planning, Performance Tests, Reflectance, Roving Vehicles, Spectroscopy
Scientific paper
The FIDO/K9 Year 2000 Mars Prototype Rover field trials at the Lunar Crater Volcanic Field, Blackrock Summit, NV provided the opportunity for the tandem acquisition of Laser Induced Breakdown Spectroscopy (LIBS) data and VISIR reflectance data from select geologic targets in a non-laboratory environment. The LIBS data were acquired by the Los Alamos National Laboratory (LANL) LIBS instrument mounted on the Ames Research Center K9 rover, and the VISIR reflectance data were acquired with an ASD Full Range portable spectrometer. The ASD instrument has a wavelength range of 350 to 2500 nm and a spectral resolution of 3 to 10 nm. LIBS is focused on the determination of the elemental composition of a target, whereas VISIR reflection spectroscopy is more useful in inferring the mineralogy. By acquiring both types of data in tandem from rovers, a more complete characterization of the target can be obtained. The samples that were measured in the field are pictured. It should be noted that sample A11/A14 is a single target separated into two pieces. In addition, the reflectance data for sample A04 proved to be unreliable so analyses are not included in this report. These considerations reduce the number of samples in the analysis to ten. Analyses of the reflectance spectra led to the separation of the samples into four distinct groups. These groups are defined as follows: (1) Group 1, Basalt endmember, low and generally featureless reflectance spectra; (2) Group 2, Goethite endmember, characteristic goethite Fe(3+) spectral features in the range of 0.50 to 0.85 microns; (3) Group 3, Kaolinite endmember, diagnostic spectral doublet with minima at 2.17 and 2.21 microns; and (4) Group 4, Dolomite endmember, carbonate feature at 2.32 microns. It should be noted that many of the samples in Group 3 also exhibit the goethite spectral features, and that the lone sample in the dolomite group has a strong kaolinite doublet in its reflectance spectrum as well. A summary of the results of the classification is given, and a graph exhibits representative spectra from each group.
Arvidson Ray E.
Blacic James D.
Cremers David A.
Ferris M.
Seelos Frank P.
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