Roger N Clark (Former Employee)
Science and Products
Filter Total Items: 75
Maximizing the science and resource mapping potential of Orbital VSWIR Spectral measurements of Mars Maximizing the science and resource mapping potential of Orbital VSWIR Spectral measurements of Mars
The last 16 years witnessed a rapid growth in understanding the composition and aqueous alteration of Mars’ surface from orbital data from the Observatoire pour la Mineralogie, l’Eau, les Glaces et l’Activité (OMEGA) [1] and Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) [2]. Both are sensitive to water-, hydroxyl-, sulfate-, and carbonate-bearing and ferric phases that...
Authors
Scott L. Murchie, Raymond E. Arvidson, Janice L Bishop, Wendy M. Calvin, John Carter, John Christian, Roger N. Clark, Colin M. Dundas, Bethany L. Ehlmann, Valerie K. Fox, Abigail A. Fraeman, Timothy A Goudge, Briony H. N. Horgan, Madison N Hughes, Ellen K Leask, Alfred S. McEwen, John F Mustard, Mario Parente, Kathryn E Powell, Frank P. Seelos, Kimberly D. Seelos, Jesse D Tarnas, Christina E Viviano, James J. Wray
Quantifying uncertainty for remote spectroscopy of surface composition Quantifying uncertainty for remote spectroscopy of surface composition
Remote surface measurements by imaging spectrometers play an important role in planetary and Earth science. To make these measurements, investigators calibrate instrument data to absolute units, invert physical models to estimate atmospheric effects, and then determine surface properties from the spectral reflectance. This study quantifies the uncertainty in this process. Global missions...
Authors
David R. Thompson, Amy Braverman, Philip Brodrick, Alberto Candela, Nimrod Carmon, Roger N. Clark, David Connelly, Robert O. Green, Raymond F. Kokaly, Longlei Li, Natalie Mahowald, Ronald L. Miller, Gregory S. Okin, Thomas H. Painter, Gregg A. Swayze, Michael Turmon, Jouni Susilouto, David Wettergreen
Imaging spectroscopy for the detection, assessment and monitoring of natural and anthropogenic hazards Imaging spectroscopy for the detection, assessment and monitoring of natural and anthropogenic hazards
Natural and anthropogenic hazards have the potential to impact all aspects of society including its economy and the environment. Diagnostic data to inform decision-making are critical for hazard management whether for emergency response, routine monitoring or assessments of potential risks. Imaging spectroscopy (IS) has unique contributions to make via the ability to provide some key...
Authors
Cindy Ong, Veronique Carrere, Sabine Chabrillat, Roger N. Clark, Todd M. Hoefen, Raymond F. Kokaly, Rodolphe Marion, Carlos Roberto de Souza Filho, Gregg A. Swayze, David R. Thompson
Isotopic ratios of Saturn's rings and satellites: Implications for the origin of water and Phoebe Isotopic ratios of Saturn's rings and satellites: Implications for the origin of water and Phoebe
Isotopic ratios have long been used to learn about physical processes acting over a wide range of geological environments, and in constraining the origin and/or evolution of planetary bodies. We report the spectroscopic detection of deuterium in Saturn's rings and satellites, and use these measurements to determine the (D/H) ratios in their near-surface regions. Saturn's moons, Phoebe...
Authors
Roger N. Clark, Robert H. Brown, D.P. Cruikshank, Gregg A. Swayze
Spatial spectroscopic models for remote exploration Spatial spectroscopic models for remote exploration
Ancient hydrothermal systems are a high-priority target for a future Mars sample return mission because they contain energy sources for microbes and can preserve organic materials (Farmer, 2000; MEPAG Next Decade Science Analysis Group, 2008; McLennan et al.,2012; Michalski et al.,2017). Characterizing these large, heterogeneous systems with a remote explorer is difficult due to...
Authors
David R. Thompson, Alberto Candela, David Wettergreen, E. Noe Dobrea, Gregg A. Swayze, Roger N Clark, Rebecca Greenberger
Characterizing the source of potentially asbestos-bearing commercial vermiculite insulation using in situ IR spectroscopy Characterizing the source of potentially asbestos-bearing commercial vermiculite insulation using in situ IR spectroscopy
Commercially produced vermiculite insulation from Libby, Montana, contains trace levels of asbestiform amphibole, which is known to cause asbestos-related diseases. When vermiculite insulation is found in a building, evaluation for its potential asbestos content traditionally involves collecting a sample from an attic or wall and submitting it for time-consuming analyses at an off-site...
Authors
Gregg A. Swayze, Heather A. Lowers, William Benzel, Roger N. Clark, Rhonda L. Driscoll, Zac S. Perlman, Todd M. Hoefen, M. Darby Dyar
Science and Products
Filter Total Items: 75
Maximizing the science and resource mapping potential of Orbital VSWIR Spectral measurements of Mars Maximizing the science and resource mapping potential of Orbital VSWIR Spectral measurements of Mars
The last 16 years witnessed a rapid growth in understanding the composition and aqueous alteration of Mars’ surface from orbital data from the Observatoire pour la Mineralogie, l’Eau, les Glaces et l’Activité (OMEGA) [1] and Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) [2]. Both are sensitive to water-, hydroxyl-, sulfate-, and carbonate-bearing and ferric phases that...
Authors
Scott L. Murchie, Raymond E. Arvidson, Janice L Bishop, Wendy M. Calvin, John Carter, John Christian, Roger N. Clark, Colin M. Dundas, Bethany L. Ehlmann, Valerie K. Fox, Abigail A. Fraeman, Timothy A Goudge, Briony H. N. Horgan, Madison N Hughes, Ellen K Leask, Alfred S. McEwen, John F Mustard, Mario Parente, Kathryn E Powell, Frank P. Seelos, Kimberly D. Seelos, Jesse D Tarnas, Christina E Viviano, James J. Wray
Quantifying uncertainty for remote spectroscopy of surface composition Quantifying uncertainty for remote spectroscopy of surface composition
Remote surface measurements by imaging spectrometers play an important role in planetary and Earth science. To make these measurements, investigators calibrate instrument data to absolute units, invert physical models to estimate atmospheric effects, and then determine surface properties from the spectral reflectance. This study quantifies the uncertainty in this process. Global missions...
Authors
David R. Thompson, Amy Braverman, Philip Brodrick, Alberto Candela, Nimrod Carmon, Roger N. Clark, David Connelly, Robert O. Green, Raymond F. Kokaly, Longlei Li, Natalie Mahowald, Ronald L. Miller, Gregory S. Okin, Thomas H. Painter, Gregg A. Swayze, Michael Turmon, Jouni Susilouto, David Wettergreen
Imaging spectroscopy for the detection, assessment and monitoring of natural and anthropogenic hazards Imaging spectroscopy for the detection, assessment and monitoring of natural and anthropogenic hazards
Natural and anthropogenic hazards have the potential to impact all aspects of society including its economy and the environment. Diagnostic data to inform decision-making are critical for hazard management whether for emergency response, routine monitoring or assessments of potential risks. Imaging spectroscopy (IS) has unique contributions to make via the ability to provide some key...
Authors
Cindy Ong, Veronique Carrere, Sabine Chabrillat, Roger N. Clark, Todd M. Hoefen, Raymond F. Kokaly, Rodolphe Marion, Carlos Roberto de Souza Filho, Gregg A. Swayze, David R. Thompson
Isotopic ratios of Saturn's rings and satellites: Implications for the origin of water and Phoebe Isotopic ratios of Saturn's rings and satellites: Implications for the origin of water and Phoebe
Isotopic ratios have long been used to learn about physical processes acting over a wide range of geological environments, and in constraining the origin and/or evolution of planetary bodies. We report the spectroscopic detection of deuterium in Saturn's rings and satellites, and use these measurements to determine the (D/H) ratios in their near-surface regions. Saturn's moons, Phoebe...
Authors
Roger N. Clark, Robert H. Brown, D.P. Cruikshank, Gregg A. Swayze
Spatial spectroscopic models for remote exploration Spatial spectroscopic models for remote exploration
Ancient hydrothermal systems are a high-priority target for a future Mars sample return mission because they contain energy sources for microbes and can preserve organic materials (Farmer, 2000; MEPAG Next Decade Science Analysis Group, 2008; McLennan et al.,2012; Michalski et al.,2017). Characterizing these large, heterogeneous systems with a remote explorer is difficult due to...
Authors
David R. Thompson, Alberto Candela, David Wettergreen, E. Noe Dobrea, Gregg A. Swayze, Roger N Clark, Rebecca Greenberger
Characterizing the source of potentially asbestos-bearing commercial vermiculite insulation using in situ IR spectroscopy Characterizing the source of potentially asbestos-bearing commercial vermiculite insulation using in situ IR spectroscopy
Commercially produced vermiculite insulation from Libby, Montana, contains trace levels of asbestiform amphibole, which is known to cause asbestos-related diseases. When vermiculite insulation is found in a building, evaluation for its potential asbestos content traditionally involves collecting a sample from an attic or wall and submitting it for time-consuming analyses at an off-site...
Authors
Gregg A. Swayze, Heather A. Lowers, William Benzel, Roger N. Clark, Rhonda L. Driscoll, Zac S. Perlman, Todd M. Hoefen, M. Darby Dyar