Kenneth Edward Herkenhoff, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 149
The ChemCam Instrument Suite on the Mars Science Laboratory (MSL) Rover: Science objectives and mast unit description
ChemCam is a remote sensing instrument suite on board the "Curiosity" rover (NASA) that uses Laser-Induced Breakdown Spectroscopy (LIBS) to provide the elemental composition of soils and rocks at the surface of Mars from a distance of 1.3 to 7 m, and a telescopic imager to return high resolution context and micro-images at distances greater than 1.16 m. We describe five analytical capabilities: ro
Authors
S. Maurice, R. C. Wiens, M. Saccoccio, B. Barraclough, O. Gasnault, O. Forni, N. Mangold, D. Baratoux, S. Bender, G. Berger, J. Bernardin, M. Berthé, N. Bridges, D. Blaney, M. Bouyé, P. Caïs, B. Clark, S. Clegg, A. Cousin, D. Cremers, A. Cros, L. DeFlores, C. Derycke, B. Dingler, G. Dromart, B. Dubois, M. Dupieux, E. Durand, L. d'Uston, C. Fabre, B. Faure, A. Gaboriaud, T. Gharsa, Kenneth E. Herkenhoff, E. Kan, L. Kirkland, D. Kouach, J.-L. Lacour, Y. Langevin, J. Lasue, S. Le Mouélic, M. Lescure, E. Lewin, D. Limonadi, G. Manhès, P. Mauchien, C. McKay, P.-Y. Meslin, Y. Michel, E. Miller, Horton E. Newsom, G. Orttner, A. Paillet, L. Parès, Y. Parot, R. Pérez, P. Pinet, F. Poitrasson, B. Quertier, B. Sallé, Christophe Sotin, V. Sautter, H. Séran, J.J. Simmonds, J.-B. Sirven, R. Stiglich, N. Striebig, J.-J. Thocaven, M.J. Toplis, D. Vaniman
Reading the climate record of the martian polar layered deposits
The martian polar regions have layered deposits of ice and dust. The stratigraphy of these deposits is exposed within scarps and trough walls and is thought to have formed due to climate variations in the past. Insolation has varied significantly over time and caused dramatic changes in climate, but it has remained unclear whether insolation variations could be linked to the stratigraphic record.
Authors
C.S. Hvidberg, K.E. Fishbaugh, M. Winstrup, A. Svensson, S. Byrne, Kenneth E. Herkenhoff
Curiosity's Mars Hand Lens Imager (MAHLI) investigation
The Mars Science Laboratory (MSL) Mars Hand Lens Imager (MAHLI) investigation will use a 2-megapixel color camera with a focusable macro lens aboard the rover, Curiosity, to investigate the stratigraphy and grain-scale texture, structure, mineralogy, and morphology of geologic materials in northwestern Gale crater. Of particular interest is the stratigraphic record of a ?5 km thick layered rock se
Authors
Kenneth S. Edgett, R. Aileen Yingst, Michael A. Ravine, Michael A. Caplinger, Justin N. Maki, F. Tony Ghaemi, Jacob A. Schaffner, James F. Bell, Laurence J. Edwards, Kenneth E. Herkenhoff, Ezat Heydari, Linda C. Kah, Mark T. Lemmon, Michelle E. Minitti, Timothy S. Olson, Timothy J. Parker, Scott K. Rowland, Juergen Schieber, Robert J. Sullivan, Dawn Y. Sumner, Peter C. Thomas, Elsa H. Jensen, John J. Simmonds, Aaron J. Sengstacken, Reg G. Wilson, Walter Goetz
Ancient impact and aqueous processes at Endeavour Crater, Mars
The rover Opportunity has investigated the rim of Endeavour Crater, a large ancient impact crater on Mars. Basaltic breccias produced by the impact form the rim deposits, with stratigraphy similar to that observed at similar-sized craters on Earth. Highly localized zinc enrichments in some breccia materials suggest hydrothermal alteration of rim deposits. Gypsum-rich veins cut sedimentary rocks ad
Authors
S. W. Squyres, R. E. Arvidson, J.F. Bell, F.J. Calef, B. C. Clark, B. A. Cohen, L.A. Crumpler, P. A. de Souza, W. H. Farrand, Ralf Gellert, J. Grant, Kenneth E. Herkenhoff, J.A. Hurowitz, J. R. Johnson, B.L. Jolliff, A.H. Knoll, R. Li, S. M. McLennan, D. W. Ming, D. W. Mittlefehldt, T. J. Parker, G. Paulsen, M.S. Rice, S. W. Ruff, C. Schröder, A. S. Yen, K. Zacny
An atlas of Mars sedimentary rocks as seen by HiRISE
Images of distant and unknown places have long stimulated the imaginations of both explorers and scientists. The atlas of photographs collected during the Hayden (1872)expedition to the Yellowstone region was essential to its successful advocacy and selection in 1872 as America’s first national park. Photographer William Henry Jackson of the Hayden expedition captured the public’s imagination and
Authors
Ross Beyer, Kathryn M. Stack, Jennifer L. Griffes, Ralph E. Milliken, Kenneth E. Herkenhoff, Shane Byrne, John W. Holt, John P. Grotzinger
Stratigraphic architecture of bedrock reference section, Victoria Crater, Meridiani Planum, Mars
The Mars Exploration Rover Opportunity has investigated bedrock outcrops exposed in several craters at Meridiani Planum, Mars, in an effort to better understand the role of surface processes in its geologic history. Opportunity has recently completed its observations of Victoria crater, which is 750 m in diameter and exposes cliffs up to ~15 m high. The plains surrounding Victoria crater are ~10
Authors
Lauren A. Edgar, John P. Grotzinger, Alex G. Hayes, David M. Rubin, Steve W. Squyres, James F. Bell, Kenneth E. Herkenhoff
Temporal observations of bright soil exposures at Gusev crater, Mars
The Mars Exploration Rover Spirit has discovered bright soil deposits in its wheel tracks that previously have been confirmed to contain ferric sulfates and/or opaline silica. Repeated Pancam multispectral observations have been acquired at four of these deposits to monitor spectral and textural changes over time during exposure to Martian surface conditions. Previous studies suggested that tempor
Authors
M.S. Rice, J.F. Bell, E.A. Cloutis, J.J. Wray, Kenneth E. Herkenhoff, R. Sullivan, J. R. Johnson, R.B. Anderson
Meteorites at Meridiani Planum provide evidence for significant amounts of surface and near-surface water on early Mars
Six large iron meteorites have been discovered in the Meridiani Planum region of Mars by the Mars Exploration Rover Opportunity in a nearly 25 km-long traverse. Herein, we review and synthesize the available data to propose that the discovery and characteristics of the six meteorites could be explained as the result of their impact into a soft and wet surface, sometime during the Noachian or the H
Authors
Alberto G. Fairen, James M. Dohm, Victor R. Baker, Shane D. Thompson, William C. Mahaney, Kenneth E. Herkenhoff, J. Alexis P. Rodriguez, Alfonso F. Davila, Dirk Schulze-Makuch, M. Ramy El Maarry, Esther R. Uceda, Ricardo Amils, Hirdy Miyamoto, Kyeong J. Kim, Robert C. Anderson, Christopher P. McKay
Seasonal erosion and restoration of Mars' northern polar dunes
Despite radically different environmental conditions, terrestrial and martian dunes bear a strong resemblance, indicating that the basic processes of saltation and grainfall (sand avalanching down the dune slipface) operate on both worlds. Here, we show that martian dunes are subject to an additional modification process not found on Earth: springtime sublimation of Mars' CO 2 seasonal polar caps.
Authors
C.J. Hansen, M. Bourke, Nathan T. Bridges, Shane Byrne, C. Colon, S. Diniega, Colin M. Dundas, Kenneth E. Herkenhoff, A. McEwen, M. Mellon, Ganna Portyankina, N. Thomas
Characteristics, distribution, origin, and significance of opaline silica observed by the Spirit rover in Gusev crater, Mars
The presence of outcrops and soil (regolith) rich in opaline silica (∼65–92 wt % SiO2) in association with volcanic materials adjacent to the “Home Plate” feature in Gusev crater is evidence for hydrothermal conditions. The Spirit rover has supplied a diverse set of observations that are used here to better understand the formation of silica and the activity, abundance, and fate of water in the fi
Authors
S. W. Ruff, J.D. Farmer, W. M. Calvin, Kenneth E. Herkenhoff, J. R. Johnson, R.V. Morris, M.S. Rice, R. E. Arvidson, J.F. Bell, P. R. Christensen, S. W. Squyres
Spectral heterogeneity on Phobos and Deimos: HiRISE observations and comparisons to Mars Pathfinder results
The High-Resolution Imaging Science Experiment (HiRISE) onboard Mars Reconnaissance Orbiter (MRO) has been used to observe Phobos and Deimos at spatial scales of around 6 and 20 m/px, respectively. HiRISE (McEwen et al.; JGR, 112, CiteID E05S02, DOI: 10.1029/2005JE002605, 2007) has provided, for the first time, high-resolution colour images of the surfaces of the Martian moons. When processed, by
Authors
N. Thomas, R. Stelter, A. Ivanov, N.T. Bridges, Kenneth E. Herkenhoff, A. S. McEwen
Evidence for mechanical and chemical alteration of iron-nickel meteorites on Mars: Process insights for Meridiani Planum
The weathering of meteorites found on Mars involves chemical and physical processes that can provide clues to climate conditions at the location of their discovery. Beginning on sol 1961, the Opportunity rover encountered three large iron meteorites within a few hundred meters of each other. In order of discovery, these rocks have been assigned the unofficial names Block Island, Shelter Island, an
Authors
James W. Ashley, M.P. Golombek, P. R. Christensen, S. W. Squyres, T.J. McCoy, C. Schroder, I. Fleischer, J. R. Johnson, Kenneth E. Herkenhoff, T. J. Parker
Science and Products
Filter Total Items: 149
The ChemCam Instrument Suite on the Mars Science Laboratory (MSL) Rover: Science objectives and mast unit description
ChemCam is a remote sensing instrument suite on board the "Curiosity" rover (NASA) that uses Laser-Induced Breakdown Spectroscopy (LIBS) to provide the elemental composition of soils and rocks at the surface of Mars from a distance of 1.3 to 7 m, and a telescopic imager to return high resolution context and micro-images at distances greater than 1.16 m. We describe five analytical capabilities: ro
Authors
S. Maurice, R. C. Wiens, M. Saccoccio, B. Barraclough, O. Gasnault, O. Forni, N. Mangold, D. Baratoux, S. Bender, G. Berger, J. Bernardin, M. Berthé, N. Bridges, D. Blaney, M. Bouyé, P. Caïs, B. Clark, S. Clegg, A. Cousin, D. Cremers, A. Cros, L. DeFlores, C. Derycke, B. Dingler, G. Dromart, B. Dubois, M. Dupieux, E. Durand, L. d'Uston, C. Fabre, B. Faure, A. Gaboriaud, T. Gharsa, Kenneth E. Herkenhoff, E. Kan, L. Kirkland, D. Kouach, J.-L. Lacour, Y. Langevin, J. Lasue, S. Le Mouélic, M. Lescure, E. Lewin, D. Limonadi, G. Manhès, P. Mauchien, C. McKay, P.-Y. Meslin, Y. Michel, E. Miller, Horton E. Newsom, G. Orttner, A. Paillet, L. Parès, Y. Parot, R. Pérez, P. Pinet, F. Poitrasson, B. Quertier, B. Sallé, Christophe Sotin, V. Sautter, H. Séran, J.J. Simmonds, J.-B. Sirven, R. Stiglich, N. Striebig, J.-J. Thocaven, M.J. Toplis, D. Vaniman
Reading the climate record of the martian polar layered deposits
The martian polar regions have layered deposits of ice and dust. The stratigraphy of these deposits is exposed within scarps and trough walls and is thought to have formed due to climate variations in the past. Insolation has varied significantly over time and caused dramatic changes in climate, but it has remained unclear whether insolation variations could be linked to the stratigraphic record.
Authors
C.S. Hvidberg, K.E. Fishbaugh, M. Winstrup, A. Svensson, S. Byrne, Kenneth E. Herkenhoff
Curiosity's Mars Hand Lens Imager (MAHLI) investigation
The Mars Science Laboratory (MSL) Mars Hand Lens Imager (MAHLI) investigation will use a 2-megapixel color camera with a focusable macro lens aboard the rover, Curiosity, to investigate the stratigraphy and grain-scale texture, structure, mineralogy, and morphology of geologic materials in northwestern Gale crater. Of particular interest is the stratigraphic record of a ?5 km thick layered rock se
Authors
Kenneth S. Edgett, R. Aileen Yingst, Michael A. Ravine, Michael A. Caplinger, Justin N. Maki, F. Tony Ghaemi, Jacob A. Schaffner, James F. Bell, Laurence J. Edwards, Kenneth E. Herkenhoff, Ezat Heydari, Linda C. Kah, Mark T. Lemmon, Michelle E. Minitti, Timothy S. Olson, Timothy J. Parker, Scott K. Rowland, Juergen Schieber, Robert J. Sullivan, Dawn Y. Sumner, Peter C. Thomas, Elsa H. Jensen, John J. Simmonds, Aaron J. Sengstacken, Reg G. Wilson, Walter Goetz
Ancient impact and aqueous processes at Endeavour Crater, Mars
The rover Opportunity has investigated the rim of Endeavour Crater, a large ancient impact crater on Mars. Basaltic breccias produced by the impact form the rim deposits, with stratigraphy similar to that observed at similar-sized craters on Earth. Highly localized zinc enrichments in some breccia materials suggest hydrothermal alteration of rim deposits. Gypsum-rich veins cut sedimentary rocks ad
Authors
S. W. Squyres, R. E. Arvidson, J.F. Bell, F.J. Calef, B. C. Clark, B. A. Cohen, L.A. Crumpler, P. A. de Souza, W. H. Farrand, Ralf Gellert, J. Grant, Kenneth E. Herkenhoff, J.A. Hurowitz, J. R. Johnson, B.L. Jolliff, A.H. Knoll, R. Li, S. M. McLennan, D. W. Ming, D. W. Mittlefehldt, T. J. Parker, G. Paulsen, M.S. Rice, S. W. Ruff, C. Schröder, A. S. Yen, K. Zacny
An atlas of Mars sedimentary rocks as seen by HiRISE
Images of distant and unknown places have long stimulated the imaginations of both explorers and scientists. The atlas of photographs collected during the Hayden (1872)expedition to the Yellowstone region was essential to its successful advocacy and selection in 1872 as America’s first national park. Photographer William Henry Jackson of the Hayden expedition captured the public’s imagination and
Authors
Ross Beyer, Kathryn M. Stack, Jennifer L. Griffes, Ralph E. Milliken, Kenneth E. Herkenhoff, Shane Byrne, John W. Holt, John P. Grotzinger
Stratigraphic architecture of bedrock reference section, Victoria Crater, Meridiani Planum, Mars
The Mars Exploration Rover Opportunity has investigated bedrock outcrops exposed in several craters at Meridiani Planum, Mars, in an effort to better understand the role of surface processes in its geologic history. Opportunity has recently completed its observations of Victoria crater, which is 750 m in diameter and exposes cliffs up to ~15 m high. The plains surrounding Victoria crater are ~10
Authors
Lauren A. Edgar, John P. Grotzinger, Alex G. Hayes, David M. Rubin, Steve W. Squyres, James F. Bell, Kenneth E. Herkenhoff
Temporal observations of bright soil exposures at Gusev crater, Mars
The Mars Exploration Rover Spirit has discovered bright soil deposits in its wheel tracks that previously have been confirmed to contain ferric sulfates and/or opaline silica. Repeated Pancam multispectral observations have been acquired at four of these deposits to monitor spectral and textural changes over time during exposure to Martian surface conditions. Previous studies suggested that tempor
Authors
M.S. Rice, J.F. Bell, E.A. Cloutis, J.J. Wray, Kenneth E. Herkenhoff, R. Sullivan, J. R. Johnson, R.B. Anderson
Meteorites at Meridiani Planum provide evidence for significant amounts of surface and near-surface water on early Mars
Six large iron meteorites have been discovered in the Meridiani Planum region of Mars by the Mars Exploration Rover Opportunity in a nearly 25 km-long traverse. Herein, we review and synthesize the available data to propose that the discovery and characteristics of the six meteorites could be explained as the result of their impact into a soft and wet surface, sometime during the Noachian or the H
Authors
Alberto G. Fairen, James M. Dohm, Victor R. Baker, Shane D. Thompson, William C. Mahaney, Kenneth E. Herkenhoff, J. Alexis P. Rodriguez, Alfonso F. Davila, Dirk Schulze-Makuch, M. Ramy El Maarry, Esther R. Uceda, Ricardo Amils, Hirdy Miyamoto, Kyeong J. Kim, Robert C. Anderson, Christopher P. McKay
Seasonal erosion and restoration of Mars' northern polar dunes
Despite radically different environmental conditions, terrestrial and martian dunes bear a strong resemblance, indicating that the basic processes of saltation and grainfall (sand avalanching down the dune slipface) operate on both worlds. Here, we show that martian dunes are subject to an additional modification process not found on Earth: springtime sublimation of Mars' CO 2 seasonal polar caps.
Authors
C.J. Hansen, M. Bourke, Nathan T. Bridges, Shane Byrne, C. Colon, S. Diniega, Colin M. Dundas, Kenneth E. Herkenhoff, A. McEwen, M. Mellon, Ganna Portyankina, N. Thomas
Characteristics, distribution, origin, and significance of opaline silica observed by the Spirit rover in Gusev crater, Mars
The presence of outcrops and soil (regolith) rich in opaline silica (∼65–92 wt % SiO2) in association with volcanic materials adjacent to the “Home Plate” feature in Gusev crater is evidence for hydrothermal conditions. The Spirit rover has supplied a diverse set of observations that are used here to better understand the formation of silica and the activity, abundance, and fate of water in the fi
Authors
S. W. Ruff, J.D. Farmer, W. M. Calvin, Kenneth E. Herkenhoff, J. R. Johnson, R.V. Morris, M.S. Rice, R. E. Arvidson, J.F. Bell, P. R. Christensen, S. W. Squyres
Spectral heterogeneity on Phobos and Deimos: HiRISE observations and comparisons to Mars Pathfinder results
The High-Resolution Imaging Science Experiment (HiRISE) onboard Mars Reconnaissance Orbiter (MRO) has been used to observe Phobos and Deimos at spatial scales of around 6 and 20 m/px, respectively. HiRISE (McEwen et al.; JGR, 112, CiteID E05S02, DOI: 10.1029/2005JE002605, 2007) has provided, for the first time, high-resolution colour images of the surfaces of the Martian moons. When processed, by
Authors
N. Thomas, R. Stelter, A. Ivanov, N.T. Bridges, Kenneth E. Herkenhoff, A. S. McEwen
Evidence for mechanical and chemical alteration of iron-nickel meteorites on Mars: Process insights for Meridiani Planum
The weathering of meteorites found on Mars involves chemical and physical processes that can provide clues to climate conditions at the location of their discovery. Beginning on sol 1961, the Opportunity rover encountered three large iron meteorites within a few hundred meters of each other. In order of discovery, these rocks have been assigned the unofficial names Block Island, Shelter Island, an
Authors
James W. Ashley, M.P. Golombek, P. R. Christensen, S. W. Squyres, T.J. McCoy, C. Schroder, I. Fleischer, J. R. Johnson, Kenneth E. Herkenhoff, T. J. Parker