Search Results - "Bell Iii, J. F."

Erosion rates at the Mars Exploration Rover landing sites and long-term climate change on Mars by Golombek, M. P., Grant, J. A., Crumpler, L. S., Greeley, R., Arvidson, R. E., Bell III, J. F., Weitz, C. M., Sullivan, R., Christensen, P. R., Soderblom, L. A., Squyres, S. W.

“…Erosion rates derived from the Gusev cratered plains and the erosion of weak sulfates by saltating sand at Meridiani Planum are so slow that they argue that…”
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In-flight calibration and performance of the Mars Exploration Rover Panoramic Camera (Pancam) instruments by Bell, J. F., Joseph, J., Sohl‐Dickstein, J. N., Arneson, H. M., Johnson, M. J., Lemmon, M. T., Savransky, D.

“…The Mars Exploration Rover Panoramic Camera (MER/Pancam) instruments have acquired more than 60,000 high‐resolution, multispectral, stereoscopic images of…”
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Wind-driven particle mobility on Mars: Insights from Mars Exploration Rover observations at “El Dorado” and surroundings at Gusev Crater by Sullivan, R., Arvidson, R., Bell III, J. F., Gellert, R., Golombek, M., Greeley, R., Herkenhoff, K., Johnson, J., Thompson, S., Whelley, P., Wray, J.

“…The ripple field known as “El Dorado” was a unique stop on Spirit's traverse where dust‐raising, active mafic sand ripples and larger inactive coarse‐grained…”
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Spectral variability among rocks in visible and near-infrared multispectral Pancam data collected at Gusev crater: Examinations using spectral mixture analysis and related techniques by Farrand, W. H., Bell III, J. F., Johnson, J. R., Squyres, S. W., Soderblom, J., Ming, D. W.

“…Visible and near‐infrared (VNIR) multispectral observations of rocks made by the Mars Exploration Rover Spirit's Panoramic camera (Pancam) have been analyzed…”
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Distribution of hydrated minerals in the north polar region of Mars by Horgan, B. H., Bell III, J. F., Noe Dobrea, E. Z., Cloutis, E. A., Bailey, D. T., Craig, M. A., Roach, L. H., Mustard, J. F.

“…The previous discovery of extensive deposits of hydrated minerals in Olympia Planum in the north polar region of Mars by the Mars Express OMEGA instrument…”
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Light-toned salty soils and coexisting Si-rich species discovered by the Mars Exploration Rover Spirit in Columbia Hills by Wang, Alian, Bell III, J. F., Li, Ron, Johnson, J. R., Farrand, W. H., Cloutis, E. A., Arvidson, R. E., Crumpler, L., Squyres, S. W., McLennan, S. M., Herkenhoff, K. E., Ruff, S. W., Knudson, A. T., Chen, Wei, Greenberger, R.

“…Light‐toned soils were exposed, through serendipitous excavations by Spirit Rover wheels, at eight locations in the Columbia Hills. Their occurrences were…”
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Calibration and in-flight performance of the Mars Odyssey Thermal Emission Imaging System visible imaging subsystem (THEMIS VIS) by McConnochie, T. H., Bell III, J. F., Savransky, D., Mehall, G., Caplinger, M., Christensen, P. R., Cherednik, L., Bender, K., Dombovari, A.

“…We describe the calibration and performance of the Mars Odyssey spacecraft's Thermal Emission Imaging System visible imaging subsystem (THEMIS VIS) and present…”
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Mineralogic constraints on sulfur-rich soils from Pancam spectra at Gusev crater, Mars by Johnson, J. R., Bell III, J. F., Cloutis, E., Staid, M., Farrand, W. H., McCoy, T., Rice, M., Wang, A., Yen, A.

“…The Mars Exploration Rover (MER) Spirit excavated sulfur‐rich soils exhibiting high albedo and relatively white to yellow colors at three main locations on and…”
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Analysis of a spectrally unique deposit in the dissected Noachian terrain of Mars by Noe Dobrea, E. Z., Bell III, J. F., McConnochie, T. H., Malin, M.

“…We have analyzed a spectrally anomalous dark intracrater deposit and an adjacent lighter‐toned fan‐shaped deposit in the dissected Noachian terrain of Mars…”
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Surface albedo observations at Gusev Crater and Meridiani Planum, Mars by Bell III, J. F., Rice, M. S., Johnson, J. R., Hare, T. M.

“…During the Mars Exploration Rover mission, the Pancam instrument has periodically acquired large‐scale panoramic images with its broadband (739 ± 338 nm)…”
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Geology of the Gusev cratered plains from the Spirit rover transverse by Golombek, M. P., Crumpler, L. S., Grant, J. A., Greeley, R., Cabrol, N. A., Parker, T. J., Rice Jr, J. W., Ward, J. G., Arvidson, R. E., Moersch, J. E., Fergason, R. L., Christensen, P. R., Castaño, A., Castaño, R., Haldemann, A. F. C., Li, R., Bell III, J. F., Squyres, S. W.

“…The cratered plains of Gusev traversed by Spirit are generally low‐relief rocky plains dominated by impact and eolian processes. Ubiquitous shallow,…”
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Evidence for montmorillonite or its compositional equivalent in Columbia Hills, Mars by Clark III, B. C., Arvidson, R. E., Gellert, R., Morris, R. V., Ming, D. W., Richter, L., Ruff, S. W., Michalski, J. R., Farrand, W. H., Yen, A., Herkenhoff, K. E., Li, R., Squyres, S. W., Schröder, C., Klingelhöfer, G., Bell III, J. F.

“…During its exploration of the Columbia Hills, the Mars Exploration Rover “Spirit” encountered several similar samples that are distinctly different from…”
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Mars Exploration Rover Engineering Cameras by Maki, J. N., Bell III, J. F., Herkenhoff, K. E., Squyres, S. W., Kiely, A., Klimesh, M., Schwochert, M., Litwin, T., Willson, R., Johnson, A., Maimone, M., Baumgartner, E., Collins, A., Wadsworth, M., Elliot, S. T., Dingizian, A., Brown, D., Hagerott, E. C., Scherr, L., Deen, R., Alexander, D., Lorre, J.

“…NASA's Mars Exploration Rover (MER) Mission will place a total of 20 cameras (10 per rover) onto the surface of Mars in early 2004. Fourteen of the 20 cameras…”
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Visible and near-infrared multispectral analysis of rocks at Meridiani Planum, Mars, by the Mars Exploration Rover Opportunity by Farrand, W. H., Bell III, J. F., Johnson, J. R., Jolliff, B. L., Knoll, A. H., McLennan, S. M., Squyres, S. W., Calvin, W. M., Grotzinger, J. P., Morris, R. V., Soderblom, J., Thompson, S. D., Watters, W. A., Yen, A. S.

“…Multispectral measurements in the visible and near infrared of rocks at Meridiani Planum by the Mars Exploration Rover Opportunity's Pancam are described. The…”
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Nickel on Mars: Constraints on meteoritic material at the surface by Yen, A. S., Mittlefehldt, D. W., McLennan, S. M., Gellert, R., Bell III, J. F., McSween Jr, H. Y., Ming, D. W., McCoy, T. J., Morris, R. V., Golombek, M., Economou, T., Madsen, M. B., Wdowiak, T., Clark, B. C., Jolliff, B. L., Schröder, C., Brückner, J., Zipfel, J., Squyres, S. W.

“…Impact craters and the discovery of meteorites on Mars indicate clearly that there is meteoritic material at the Martian surface. The Alpha Particle X‐ray…”
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TES spectroscopic identification of a region of persistent water ice clouds on the flanks of Arsia Mons Volcano, Mars by Noe Dobrea, E. Z., Bell III, J. F.

“…As part of a search for small‐scale spectrally anomalous regions within the Mars Global Surveyor Thermal Emission Spectrometer (MGS/TES) data set, we have…”
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Visible to Near‐Infrared Reflectance Spectroscopy of Asteroid (16) Psyche: Implications for the Psyche Mission's Science Investigations by Dibb, S. D., Bell, J. F., Elkins‐Tanton, L. T., Williams, D. A.

“…The NASA Psyche mission will explore the structure, composition, and other properties of asteroid (16) Psyche to test hypotheses about its formation…”
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Characterization of previously unidentified lunar pyroclastic deposits using Lunar Reconnaissance Orbiter Camera data by Gustafson, J. Olaf, Bell III, J. F., Gaddis, L. R., Hawke, B. R., Giguere, T. A.

“…We used a Lunar Reconnaissance Orbiter Camera (LROC) global monochrome Wide‐angle Camera (WAC) mosaic to conduct a survey of the Moon to search for previously…”
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Constraints on dust aerosols from the Mars Exploration Rovers using MGS overflights and Mini-TES by Wolff, M. J., Smith, M. D., Clancy, R. T., Spanovich, N., Whitney, B. A., Lemmon, M. T., Bandfield, J. L., Banfield, D., Ghosh, A., Landis, G., Christensen, P. R., Bell III, J. F., Squyres, S. W.

“…Overflights of the Mars Exploration Rovers (MER) by the Mars Global Surveyor (MGS) provide a unique opportunity to examine some of the basic properties of dust…”
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Pre‐Flight and In‐Flight Calibration and Performance of the Terminal Tracking Cameras (TTCams) on the NASA Lucy Mission by Zhao, Y., Bell, J. F., Sahr, E., Lessac‐Chenen, E., Adam, C., Cisneros, E., Winhold, A., Caplinger, M., Ravine, M., Schaffner, J., Shamah, J., Mottola, S.

“…The Terminal Tracking Camera (TTCam) imaging system on the NASA Lucy Discovery mission consists of a pair of cameras that are being used mainly as a navigation…”
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