Publications
Filter Total Items: 960
Color imaging of Mars by the High Resolution Imaging Science Experiment (HiRISE) Color imaging of Mars by the High Resolution Imaging Science Experiment (HiRISE)
HiRISE has been producing a large number of scientifically useful color products of Mars and other planetary objects. The three broad spectral bands, coupled with the highly sensitive 14 bit detectors and time delay integration, enable detection of subtle color differences. The very high spatial resolution of HiRISE can augment the mineralogic interpretations based on multispectral...
Authors
W. Alan Delamere, Livio L. Tornabene, Alfred S. McEwen, Kris J. Becker, James W. Bergstrom, Nathan T. Bridges, Eric M. Eliason, Dennis Gallagher, Kenneth E. Herkenhoff, Laszlo P. Keszthelyi, Sarah Mattson, Guy K. McArthur, Michael T. Mellon, Moses P. Milazzo, Patrick S. Russell, Nicolas Thomas
Inverted channel deposits on the floor of Miyamoto crater, Mars Inverted channel deposits on the floor of Miyamoto crater, Mars
Morphological features on the western floor of Miyamoto crater in southwestern Meridiani Planum, Mars, are suggestive of past fluvial activity. Imagery from the High Resolution Imaging Science Experiment (HiRISE) gives a detailed view of raised curvilinear features that appear to represent inverted paleochannel deposits. The inverted terrain appears to be capped with a resistant, dark...
Authors
Horton E. Newsom, Nina L. Lanza, Ann M. Ollila, Sandra M. Wiseman, Ted L. Roush, Giuseppe A. Marzo, Livio L. Tornabene, Chris H. Okubo, Mikki M. Osterloo, Victoria E. Hamilton, Larry S. Crumpler
Porosity and grain size controls on compaction band formation in Jurassic Navajo Sandstone Porosity and grain size controls on compaction band formation in Jurassic Navajo Sandstone
Determining the rock properties that permit or impede the growth of compaction bands in sedimentary sequences is a critical problem of importance to studies of strain localization and characterization of subsurface geologic reservoirs. We determine the porosity and average grain size of a sequence of stratigraphic layers of Navajo Sandstone that are then used in a critical state model to...
Authors
Richard A. Schultz, Chris H. Okubo, Haakon Fossen
Mapping products of Titan's surface Mapping products of Titan's surface
Remote sensing instruments aboard the Cassini spacecraft have been observed the surface of Titan globally in the infrared and radar wavelength ranges as well as locally by the Huygens instruments revealing a wealth of new morphological features indicating a geologically active surface. We present a summary of mapping products of Titan's surface derived from data of the remote sensing...
Authors
Katrin Stephan, Ralf Jaumann, Erich Karkoschka, Randolph L. Kirk, Jason W. Barnes, Martin G. Tomasko, Elizabeth P. Turtle, Lucille Le Corre, Mirjam Langhans, Stéphane Le Mouélic, Ralph D. Lorenz, Jason Perry
Evidence for debris flow gully formation initiated by shallow subsurface water on Mars Evidence for debris flow gully formation initiated by shallow subsurface water on Mars
The morphologies of some martian gullies appear similar to terrestrial features associated with debris flow initiation, erosion, and deposition. On Earth, debris flows are often triggered by shallow subsurface throughflow of liquid water in slope-mantling colluvium. This flow causes increased levels of pore pressure and thus decreased shear strength, which can lead to slide failure of...
Authors
Nina L. Lanza, Grant A. Meyer, Chris Okubo, Horton E. Newsom, Roger C. Wiens
Emplacement of the youngest flood lava on Mars: A short, turbulent story Emplacement of the youngest flood lava on Mars: A short, turbulent story
Recently acquired data from the High Resolution Imaging Science Experiment (HiRISE), Context (CTX) imager, and Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) onboard the Mars Reconnaissance Orbiter (MRO) spacecraft were used to investigate the emplacement of the youngest flood-lava flow on Mars. Careful mapping finds that the Athabasca Valles flood lava is the product of a...
Authors
Windy L. Jaeger, Laszlo P. Keszthelyi, James A. Skinner, Moses P. Milazzo, Alfred S. McEwen, Timothy N. Titus, Mark R. Rosiek, Donna M. Galuszka, Elpitha Howington-Kraus, Randolph L. Kirk
Structural geology of Amazonian-aged layered sedimentary deposits in southwest Candor Chasma, Mars Structural geology of Amazonian-aged layered sedimentary deposits in southwest Candor Chasma, Mars
The structural geology of an outcropping of layered sedimentary deposits in southwest Candor Chasma is mapped using two adjacent high-resolution (1 m/pixel) HiRISE digital elevation models and orthoimagery. Analysis of these structural data yields new insight into the depositional and deformational history of these deposits. Bedding in non-deformed areas generally dips toward the center...
Authors
Chris Okubo
Lunar Reconnaissance Orbiter Camera (LROC) instrument overview Lunar Reconnaissance Orbiter Camera (LROC) instrument overview
The Lunar Reconnaissance Orbiter Camera (LROC) Wide Angle Camera (WAC) and Narrow Angle Cameras (NACs) are on the NASA Lunar Reconnaissance Orbiter (LRO). The WAC is a 7-color push-frame camera (100 and 400 m/pixel visible and UV, respectively), while the two NACs are monochrome narrow-angle linescan imagers (0.5 m/pixel). The primary mission of LRO is to obtain measurements of the Moon...
Authors
M.S. Robinson, S.M. Brylow, M. Tschimmel, D. Humm, S.J. Lawrence, P.C. Thomas, B.W. Denevi, E. Bowman-Cisneros, J. Zerr, M.A. Ravine, M.A. Caplinger, F.T. Ghaemi, J.A. Schaffner, M. C. Malin, P. Mahanti, A. Bartels, J. Anderson, T.N. Tran, E. M. Eliason, A. S. McEwen, E. Turtle, B.L. Jolliff, H. Hiesinger
The High Resolution Imaging Science Experiment (HiRISE) during MRO's Primary Science Phase (PSP) The High Resolution Imaging Science Experiment (HiRISE) during MRO's Primary Science Phase (PSP)
The High Resolution Imaging Science Experiment (HiRISE) on the Mars Reconnaissance Orbiter (MRO) acquired 8 terapixels of data in 9137 images of Mars between October 2006 and December 2008, covering ∼0.55% of the surface. Images are typically 5–6 km wide with 3-color coverage over the central 20% of the swath, and their scales usually range from 25 to 60 cm/pixel. Nine hundred and sixty...
Authors
Alfred S. McEwen, Maria E. Banks, Nicole Baugh, Kris J. Becker, Aaron Boyd, James W. Bergstrom, Ross A. Beyer, Edward Bortolini, Nathan T. Bridges, Shane Byrne, Bradford Castalia, Frank C. Chuang, Larry S. Crumpler, Ingrid J. Daubar, Alix K. Davatzes, Donald G. Deardorff, Alaina DeJong, W. Alan Delamere, Eldar Z. Noe Dobrea, Colin M. Dundas, Eric M. Eliason, Yisrael Espinoza, Audrie Fennema, Kathryn E. Fishbaugh, Terry Forrester, Paul E. Geissler, John A. Grant, Jennifer L. Griffes, John P. Grotzinger, Virginia C. Gulick, Candice J. Hansen, Kenneth E. Herkenhoff, Rodney Heyd, Windy L. Jaeger, Dean Jones, Bob Kanefsky, Laszlo P. Keszthelyi, Robert King, Randolph L. Kirk, Kelly J. Kolb, Jeffrey Lasco, Alexandra Lefort, Richard Leis, Kevin W. Lewis, Sara Martinez-Alonso, Sarah Mattson, Guy K. McArthur, Michael T. Mellon, Joannah Metz, Moses P. Milazzo, Ralph E. Milliken, Tahirih Motazedian, Chris Okubo, Albert Ortiz, Andrea J. Philippoff, Joseph Plassmann, Anjani Polit, Patrick S. Russell, Christian Schaller, Mindi L. Searls, Timothy Spriggs, Steve W. Squyres, Steven Tarr, Nicolas Thomas, Bradley J. Thomson, Livio L. Tornabene, Charlie Van Houten, Circe Verba, Catherine M. Weitz, James J. Wray
Geomorphic knobs of Candor Chasma, Mars: New Mars Reconnaissance Orbiter data and comparisons to terrestrial analogs Geomorphic knobs of Candor Chasma, Mars: New Mars Reconnaissance Orbiter data and comparisons to terrestrial analogs
High Resolution Imaging Science Experiment (HiRISE) imagery and digital elevation models of the Candor Chasma region of Valles Marineris, Mars, reveal prominent and distinctive positive-relief knobs amidst light-toned layers. Three classifications of knobs, Types 1, 2, and 3, are distinguished from a combination of HiRISE and Thermal Emission Imaging System (THEMIS) images based on...
Authors
Marjorie A. Chan, Jens Ormö, Scott L. Murchie, Chris Okubo, Goro Komatsu, James J. Wray, Patrick E. McGuire, James A. McGovern
Coregistration of Mars Orbiter Laser Altimeter (MOLA) topography with high-resolution Mars images Coregistration of Mars Orbiter Laser Altimeter (MOLA) topography with high-resolution Mars images
Spacecraft continue to send back extraordinary amounts of data from Mars leaving scientists with the considerable task of analyzing an ever-increasing wealth of information. There are abundant uses for coregistered topography and images, but coregistering various datasets can be time-consuming and labor-intensive. We have developed a set of C-shell Unix scripts and Interactive Data...
Authors
Kelly J. Kolb, Chris H. Okubo
Preservation of random megascale events on Mars and Earth: Influence on geologic history: GSA special papers Preservation of random megascale events on Mars and Earth: Influence on geologic history: GSA special papers
No abstract available.
Authors
Mary G. Chapman, Laszlo P. Keszthelyi