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Your search keyword '"Bandfield, J.L."' showing total 21 results
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21 results on '"Bandfield, J.L."'

18. Chloride-bearing materials in the southern highlands of Mars

Author

Osterloo, M.M., Hamilton, V.E., Bandfield, J.L., Glotch, T.D., Baldridge, A.M., Christensen, P.R., Tornabene, L.L., and Anderson, F.S.

Subjects
Planets -- Discovery and exploration, Chlorides -- Research, Dichloropropane -- Research, Mars (Planet) -- Discovery and exploration
Published
2008

19. Mineralogy at Meridiani Planum from the Mini-TES experiment on the Opportunity rover

Author

Christensen, P.R., Wyatt, M.B., Glotch, T.D., Rogers, A.D., Anwar, S., Arvidson, R.E., Bandfield, J.L., Blaney, D.L., Budney, C., Calvin, W.M., Fallacaro, A., Fergason, R.L., Gorelick, N., Graff, T.G., Hamilton, V.E., Hayes, A.G., Johnson, J.R., Knudson, A.T., McSween, Jr., H.Y., Mehall, G.L., Mehall, L.K., Moersch, J.E., Morris, R.V., Smith, M.D., Squyres, S.W., Ruff, S.W., and Wolff, M.J.

Subjects
Opportunity (Space probe) -- Research, Mars probes -- Research -- Discovery and exploration, Mars (Planet) -- Discovery and exploration -- Composition -- Analysis -- Research, Mineralogical research -- Analysis -- Discovery and exploration -- Research, Science and technology, Discovery and exploration, Analysis, Composition, Research
Abstract

The Miniature Thermal Emission Spectrometer (Mini-TES) on Opportunity investigated the mineral abundances and compositions of outcrops, rocks, and soils at Meridiani Planum. Coarse crystalline hematite and olivine-rich basaltic sands were observed as predicted from orbital TES spectroscopy. Outcrops of aqueous origin are composed of 15 to 35% by volume magnesium and calcium sulfates [a high-silica component modeled as a combination of glass, feldspar, and sheet silicates (~20 to 30%)], and hematite; only minor jarosite is identified in Mini-TES spectra. Mini-TES spectra show only a hematite signature in the millimeter-sized spherules. Basaltic materials have more plagioclase than pyroxene, contain olivine, and are similar in inferred mineral composition to basalt mapped from orbit. Bounce rock is dominated by clinopyroxene and is close in inferred mineral composition to the basaltic martian meteorites. Bright wind streak material matches global dust. Waterlain rocks covered by unaltered basaltic sands suggest a change from an aqueous environment to one dominated by physical weathering., The Mini-TES has provided remote measurements of mineral abundances and compositions, thermophysical properties, atmospheric temperature profiles, and atmospheric dust and ice opacities at the Opportunity rover landing site in Meridiani [...]

Published
2004

20. Initial results from the mini-TES experiment in Gusev crater from the Spirit rover

Author

Christensen, P.R., Ruff, S.W., Fergason, R.L., Knudson, A.T., Anwar, S., Arvidson, R.E., Bandfield, J.L., Blaney, D.L., Budney, C., Calvin, W.M., Glotch, T.D., Golombek, M.P., Gorelick, N., Graff, T.G., Hamilton, V.S., Hayes, A., Johnson, J.R., McSween, Jr., H.Y., Mehall, G.L., Mehall, L.K., Moersch, J.E., Morris, R.V., Rogers, A.D., Smith, M.D., Squyres, S.W., Wolff, M.J., and Wyatt, M.B.

Subjects
Spirit (Space probe) -- Observations -- Equipment and supplies, Mars (Planet) -- Research -- Properties -- Equipment and supplies, Geology -- Research -- Equipment and supplies, Science and technology, Observations, Research, Properties, Equipment and supplies
Abstract

The Miniature Thermal Emission Spectrometer (Mini-TES) on Spirit has studied the mineralogy and thermophysical properties at Gusev crater. Undisturbed soil spectra show evidence for minor carbonates and bound water. Rocks are olivine-rich basalts with varying degrees of dust and other coatings. Dark-toned soils observed on disturbed surfaces may be derived from rocks and have derived mineralogy (± 5 to 10%) of 45% pyroxene (20% Ca-rich pyroxene and 25% pigeonite), 40% sodic to intermediate plagioclase, and 15% olivine (forsterite 45% ± 5 to 10). Two spectrally distinct coatings are observed on rocks, a possible indicator of the interaction of water, rock, and airfall dust. Diurnal temperature data indicate particle sizes from 40 to 80 µm in hollows to ~0.5 to 3 mm in soils., The Miniature Thermal Emission Spectrometer (Mini-TES) has provided remote measurements of mineralogy, thermophysical properties, and atmospheric temperature profile and composition of the scene surrounding the Spirit rover. The mineralogy of [...]

Published
2004

21. InSight - The First Three Months on Mars

Author

Banerdt, B., Smrekar, S., Antonangeli, D., Asmar, Sami, Bandfield, J.L., Beghein, C., Bowles, Neil, Bozdag, E., Chi, P. J., Christensen, U., Clinton, John, Collins, G., Daubar, I., Dehant, V., Fillingim, M., Folkner, W., Garcia, R., Garvin, J., Giardini, D., Golombek, M., Grant, J.A., Grott, Matthias, Müller, Nils, Plesa, Ana-Catalina, and Spohn, Tilman

Subjects
Geophysics, Planetenphysik, HP3, Leitungsbereich PF, Mars, InSight

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