NASA Technical Reports Server (NTRS) : Dust pdf

NASA Technical Reports Server (NTRS) : Dust

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Description of the Book:

Dust coatings on the surface of Mars complicate and, if sufficiently thick, mask the spectral characteristics and compositional determination of underlying material from in situ and remote sensing instrumentation. The Laser-Induced Breakdown Spectroscopy (LIBS) portion of the Chemistry & Camera (ChemCam) instrument, aboard the Mars Science Laboratory (MSL) rover, will be the first active remote sensing technique deployed on Mars able to remove dust. ChemCam utilizes a 5 ns pulsed 1067 nm high-powered laser focused to less than 400 m diameter on targets at distances up to 7 m [1,2]. With multiple laser pulses, dust and weathering coatings can be remotely analyzed and potentially removed using this technique [2,3]. A typical LIBS measurement during MSL surface operations is planned to consist of 50 laser pulses at ~14 mJ, with the first 5 to 10 pulses used to analyze as well as remove any surface coating. Additionally, ChemCam’s Remote Micro-Imager (RMI) is capable of resolving 200 m details at a distance of 2 m, or 1 mm at 10 m [1,4].

In this study, we report on initial laboratory experiments conducted to characterize the removal of dust coatings using similar LIBS parameters as ChemCam under Mars-like conditions. These experiments serve to better understand the removal of surface dust using LIBS and to facilitate the analysis of ChemCam LIBS spectral data and RMI images

• Creator/s: NASA Technical Reports Server (NTRS
• Date: 1/1/2011
• Year: 2011
• Book Topics/Themes: NASA Technical Reports Server (NTRS), DUST, LASER-INDUCED BREAKDOWN SPECTROSCOPY, MARS SURFACE, REMOTE SENSING, COATING, MARS SCIENCE LABORATORY, CURIOSITY ROVER, CARBON DIOXIDE, EMISSION SPECTRA, IMAGING TECHNIQUES, WEATHERING, MARS ROVING VEHICLES, Graff, T. G., Morris, R. V., Clegg, S. M., Wiens, R. C., Anderson, R. B

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