A5050674853- Planetary Science and Exploration
- Astro and Planetary Science
- Space Exploration and Technology
- Geochemistry and Geologic Mapping
- Space Science and Extraterrestrial Life
- Geology and Paleoclimatology Research
- Hydrocarbon exploration and reservoir analysis
- Methane Hydrates and Related Phenomena
- Paleontology and Stratigraphy of Fossils
- Spaceflight effects on biology
- Isotope Analysis in Ecology
- Atmospheric and Environmental Gas Dynamics
- Geological and Geochemical Analysis
- Scientific Research and Discoveries
- Spacecraft and Cryogenic Technologies
- Remote-Sensing Image Classification
- Geological Studies and Exploration
- Nuclear Physics and Applications
- Laser-induced spectroscopy and plasma
- Spacecraft Design and Technology
- Space exploration and regulation
- Geological formations and processes
- Space Satellite Systems and Control
- Atmospheric Ozone and Climate
- Meteorological Phenomena and Simulations
Johns Hopkins University Applied Physics Laboratory
2014-2024
University of Nevada, Reno
2004-2023
Johns Hopkins University
2007-2021
Washington University in St. Louis
2001-2007
Jet Propulsion Laboratory
2004-2007
Astrogeology Science Center
2007
United States Geological Survey
2007
Ames Research Center
2004-2007
Search for Extraterrestrial Intelligence
2004-2007
University of Arizona
2007
The Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) is a hyperspectral imager on the Orbiter (MRO) spacecraft. CRISM consists of three subassemblies, gimbaled Optical Sensor Unit (OSU), Data Processing (DPU), and Gimbal Motor Electronics (GME). CRISM's objectives are (1) to map entire surface using subset bands characterize crustal mineralogy, (2) mineralogy key areas at high spectral spatial resolution, (3) measure seasonal variations in atmosphere. These addressed major types...
Martian aqueous mineral deposits have been examined and characterized using data acquired during Mars Reconnaissance Orbiter's (MRO) primary science phase, including Compact Imaging Spectrometer for hyperspectral images covering the 0.4–3.9 μ m wavelength range, coordinated with higher–spatial resolution HiRISE Context Imager images. MRO's new high‐resolution measurements, combined earlier from Thermal Emission Spectrometer; System; Observatoire pour la Minéralogie, L'Eau, les Glaces et...
Abstract The investigation of hyperspectral data from the Mars Reconnaissance Orbiter Compact Imaging Spectrometer for (CRISM) and Observatoire pour la Minéralogie, L'Eau, les Glaces et l'Activitié (OMEGA) on Express has revealed an increasingly diverse suite minerals present Martian surface. A revised set 60 spectral parameters derived corrected reflectance at key wavelengths in CRISM targeted observations designed to capture known diversity surface mineralogy is presented here as “summary...
Martian Impact craters form frequently on Mars, exposing material that would otherwise remain hidden below the surface. Byrne et al. (p. 1674 ) identified mid-latitude formed over last few years, imaged them in great detail with a camera board Mars Reconnaissance Orbiter, and monitored subsequent changes. The excavated buried water ice, which was later seen sublimating away. In addition, some might have completely through ice. observations are consistent models other suggest ice should be...
Observations by the Compact Reconnaissance Imaging Spectrometer (CRISM) onboard Mars Orbiter (MRO) over range 440–2920 nm of very dusty Martian atmosphere 2007 planet‐encircling dust event are combined with those made both Exploration Rovers (MERs) to better characterize single scattering albedo ( ω 0 ) aerosols. Using diagnostic geometry CRISM emission phase function (EPF) sequences and “ground truth” connection provided at MER locations allows one more effectively isolate ). This approach...
The part of the Compact Reconnaissance Imaging Spectrometer (CRISM) for Mars investigation conducted during Orbiter's (MRO's) primary science phase was a comprehensive past aqueous environments, structure planet's crust, climate, and current meteorology. measurements to implement this include over 9500 targeted observations surface features taken at spatial resolutions better than 40 m/pixel, monitoring seasonal variations in atmospheric aerosols trace gases, acquisition 200 m/pixel map...
Water has supposedly marked the surface of Mars and produced characteristic landforms. To understand history water on Mars, we take a close look at key locations with High-Resolution Imaging Science Experiment board Reconnaissance Orbiter, reaching fine spatial scales 25 to 32 centimeters per pixel. Boulders ranging up approximately 2 meters in diameter are ubiquitous middle high latitudes, which include deposits previously interpreted as finegrained ocean sediments or dusty snow. Bright...
New results from the Compact Reconnaissance Imaging Spectrometer for Mars and High Resolution Science Experiment Context Imager cameras on Orbiter provide insights into origin of interior layered deposits in Valles Marineris analysis a thick, well‐exposed section western Candor Chasma. Most deposit is dominated spectrally by nanophase ferric oxide like that found globally distributed eolian dust, with addition prevalent component monohydrated sulfates. A rippled mantle containing both...
[1] Columbus crater in the Terra Sirenum region of Martian southern highlands contains light-toned layered deposits with interbedded sulfate and phyllosilicate minerals, a rare occurrence on Mars. Here we investigate detail morphology, thermophysical properties, mineralogy, stratigraphy these deposits; explore their regional context; interpret crater's aqueous history. Hydrated mineral-bearing occupy discrete ring around walls are also exposed beneath younger materials, possibly lava flows,...
The precise location and relative elevation of Spirit during its traverses from the Columbia Memorial station to Bonneville crater were determined with bundle-adjusted retrievals rover wheel turns, suspension tilt angles, overlapping images. Physical properties experiments show a decrease 0.2% per Mars solar day in cell output resulting deposition airborne dust, cohesive soil-like deposits plains hollows, bright dark rock coatings, relatively weak volcanic rocks basaltic composition....
Research Article| November 01, 2009 Diverse aqueous environments on ancient Mars revealed in the southern highlands James J. Wray; Wray 1Department of Astronomy, Cornell University, Ithaca, New York 14853, USA Search for other works by this author on: GSW Google Scholar Scott L. Murchie; Murchie 2Johns Hopkins University/Applied Physics Laboratory, Laurel, Maryland 20723, Steven W. Squyres; Squyres Frank P. Seelos; Seelos Livio Tornabene 3Lunar and Planetary University Arizona, Tucson,...
Research Article| October 01, 2013 A hematite-bearing layer in Gale Crater, Mars: Mapping and implications for past aqueous conditions A.A. Fraeman; Fraeman 1Department of Earth Planetary Sciences, Washington University St. Louis, Missouri 63130, USA Search other works by this author on: GSW Google Scholar R.E. Arvidson; Arvidson J.G. Catalano; Catalano J.P. Grotzinger; Grotzinger 2Department Geological California Institute Technology, Pasadena, 91125, R.V. Morris; Morris 3NASA Johnson Space...
The Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) on the Orbiter (MRO) collected hyperspectral images of Martian surface and atmosphere from September 27, 2006, through May 7, 2022. Over that time, nearly twenty scientific investigations were completed, most which arose as a result findings previous investigations. Two review papers published in 2009 (Murchie et al., 2009a, b) described initial two-year investigation during MRO's Primary Science Phase, its key findings, CRISM...
Abstract Jupiter’s icy moon, Europa, harbors a subsurface liquid water ocean; the prospect of this ocean being habitable motivates further exploration moon with upcoming NASA Europa Clipper mission. Key among mission goals is comprehensive assessment moon’s composition, which essential for assessing Europa’s habitability. Through powerful remote sensing and in situ investigations, will explore composition surface subsurface, its tenuous atmosphere, local space environment surrounding moon....
The soils at the Opportunity site are fine-grained basaltic sands mixed with dust and sulfate-rich outcrop debris. Hematite is concentrated in spherules eroded from strata. Ongoing saltation exhumes their fragments, concentrating them surface. Spherules emerge coated, perhaps subsurface cementation, by salts. Two types of vesicular clasts may represent sand sources. Eolian ripples, armored well-sorted hematite-rich grains, pervade Meridiani Planum. thickness soil on plain estimated to be...
Panoramic Camera images at Gusev crater reveal a rock-strewn surface interspersed with high- to moderate-albedo fine-grained deposits occurring in part as drifts or small circular swales hollows. Optically thick coatings of ferric iron-rich dust dominate most bright soil and rock surfaces. Spectra some darker surfaces regions exposed by brushing grinding show near-infrared spectral signatures consistent the presence mafic silicates such pyroxene olivine. Atmospheric observations steady...
Panoramic Camera (Pancam) images from Meridiani Planum reveal a low-albedo, generally flat, and relatively rock-free surface. Within around impact craters fractures, laminated outcrop rocks with higher albedo are observed. Fine-grained materials include dark sand, bright ferric iron-rich dust, angular rock clasts, millimeter-size spheroidal granules that eroding out of the rocks. Spectra one plains consistent mafic silicates such as pyroxene olivine. both spherules indicate presence...
The location of the Opportunity landing site was determined to better than 10-m absolute accuracy from analyses radio tracking data. We Rover locations during traverses with an error as small several centimeters using engineering telemetry and overlapping images. Topographic profiles generated rover data show that plains are very smooth meter- centimeter-length scales, consistent orbital observations. Solar cell output decreased because deposition airborne dust on panels. lack dust-covered...
The Terra Sirenum region of Mars, located in the Noachian southern highlands, is mineralogically diverse, providing unique insight into ancient aqueous processes. Analyses remote sensing data over indicate presence both Fe‐ or Mg‐rich phyllosilicates and a spectrally deposit interpreted to be rich chloride salts. stratigraphic relationships that are part highland crust salts were deposited at later time. In some instances, there clear morphological evidence mobilized by near‐surface waters.
We present detailed stratigraphic and spectral analyses that focus on a region in northern Sinus Meridiani located between 1°N to 5°N latitude 3°W 1°E longitude. Several stratigraphically distinct units are defined mapped using morphologic expression, properties, superposition relationships. Previously unreported exposures of hydrated sulfates Fe/Mg smectites identified MRO CRISM MEX OMEGA near‐infrared (1.0 2.5 μ m) reflectance observations. Layered deposits with monohydrated polyhydrated...
Abstract Orbital data acquired by the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) and High Resolution Science Experiment instruments on Orbiter (MRO) provide a synoptic view of compositional stratigraphy floor Gale crater surrounding area where Laboratory (MSL) Curiosity landed. Fractured, light‐toned material exhibits 2.2 µm absorption consistent with enrichment in hydroxylated silica. This may be distal sediment from Peace Vallis fan, cement fracture fill containing unit...