K. E. Herkenhoff
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View article: Empirical Correction of Bright Halos in ChemCam and SuperCam RMI Long Distance Mosaics
Empirical Correction of Bright Halos in ChemCam and SuperCam RMI Long Distance Mosaics Open
International audience
View article: The high-resolution imaging science experiment (HiRISE) in the MRO extended science phases (2009–2023)
The high-resolution imaging science experiment (HiRISE) in the MRO extended science phases (2009–2023) Open
The Mars Reconnaissance Orbiter has been orbiting Mars since 2006 and has acquired >80,000 HiRISE images with sub-meter resolution, contributing to over 2000 peer-reviewed publications, and has provided the data needed to enable safe surfa…
View article: Depositional and Diagenetic Processes of Martian Lacustrine Sediments as Revealed at Pahrump Hills by the Mars Hand Lens Imager, Gale Crater, Mars
Depositional and Diagenetic Processes of Martian Lacustrine Sediments as Revealed at Pahrump Hills by the Mars Hand Lens Imager, Gale Crater, Mars Open
The Murray formation represents fine‐grained sedimentary deposition in lacustrine environments within Gale crater, Mars. Both the overall thickness of the Murray formation and its broad uniformity in sedimentary character suggest the poten…
View article: Regolith of the Crater Floor Units, Jezero Crater, Mars: Textures, Composition, and Implications for Provenance
Regolith of the Crater Floor Units, Jezero Crater, Mars: Textures, Composition, and Implications for Provenance Open
A multi‐instrument study of the regolith of Jezero crater floor units by the Perseverance rover has identified three types of regolith: fine‐grained, coarse‐grained, and mixed‐type. Mastcam‐Z, Wide Angle Topographic Sensor for Operations a…
View article: Comparison of Ventifact Orientations and Recent Wind Direction Indicators on the Floor of Jezero Crater, Mars
Comparison of Ventifact Orientations and Recent Wind Direction Indicators on the Floor of Jezero Crater, Mars Open
K. E. Herkenhoff1, R. J. Sullivan2, C. E. Newman3, G. Paar4, M. Baker5, D. Viúdez-Moreiras6, J. W. Ashley7, A. Bechtold8, J. I. Nuñez91U.S. Geological Survey Astrogeology Science Center, Flagstaff, AZ 860012Cornell University, Ithaca, NY 1…
View article: Comparison of Ventifact Orientations and Recent Wind Direction Indicators on the Floor of Jezero Crater, Mars
Comparison of Ventifact Orientations and Recent Wind Direction Indicators on the Floor of Jezero Crater, Mars Open
Wind‐abraded rocks and aeolian bedforms have been observed at the Mars 2020 Perseverance landing site, providing evidence for recent and older wind directions. This study reports orientations of aeolian features measured in Perseverance im…
View article: Winds at the Mars 2020 Landing Site. 2. Wind Variability and Turbulence
Winds at the Mars 2020 Landing Site. 2. Wind Variability and Turbulence Open
Wind speeds measured by the Mars 2020 Perseverance rover in Jezero crater were fitted as a Weibull distribution. InSight wind data acquired in Elysium Planitia were also used to contextualize observations. Jezero winds were found to be muc…
View article: Winds at the Mars 2020 Landing Site: 1. Near‐Surface Wind Patterns at Jezero Crater
Winds at the Mars 2020 Landing Site: 1. Near‐Surface Wind Patterns at Jezero Crater Open
This is the first part of a two‐part paper. NASA's Mars 2020 Perseverance rover measured winds on the Jezero crater floor close to the delta of an ancient river. A mostly repeatable diurnal cycle was observed and presented two regimes: (a)…
View article: Overview of the Morphology and Chemistry of Diagenetic Features in the Clay‐Rich Glen Torridon Unit of Gale Crater, Mars
Overview of the Morphology and Chemistry of Diagenetic Features in the Clay‐Rich Glen Torridon Unit of Gale Crater, Mars Open
The clay‐rich Glen Torridon region of Gale crater, Mars, was explored between sols 2300 and 3007. Here, we analyzed the diagenetic features observed by Curiosity , including veins, cements, nodules, and nodular bedrock, using the ChemCam, …
View article: The near-surface wind patterns as observed by NASA’s Mars 2020 Mission at Jezero Crater, Mars
The near-surface wind patterns as observed by NASA’s Mars 2020 Mission at Jezero Crater, Mars Open
<p>NASA&#8217;s Mars 2020 Perseverance rover landed in Jezero Crater (~18.4&#186;N, 77.6&#186;E) on February 2021 at L<sub>s</sub>~5&#186;, just after the northern spring equinox. Perseverance carries the …
View article: hical—The HiRISE radiometric calibration software developed within the ISIS3 planetary image processing suite
hical—The HiRISE radiometric calibration software developed within the ISIS3 planetary image processing suite Open
First posted January 19, 2022 For additional information, contact: Contact Astrogeology Research Program staffAstrogeology Science CenterU.S. Geological Survey2255 N. Gemini Dr.Flagstaff, AZ 86001 This report summarizes the software and al…
View article: Active Mars: A Dynamic World
Active Mars: A Dynamic World Open
Mars exhibits diverse surface changes at all latitudes and all seasons. Active processes include impact cratering, aeolian sand and dust transport, a variety of slope processes, changes in polar ices, and diverse effects of seasonal CO 2 f…
View article: Alternating wet and dry depositional environments recorded in the stratigraphy of Mount Sharp at Gale crater, Mars
Alternating wet and dry depositional environments recorded in the stratigraphy of Mount Sharp at Gale crater, Mars Open
The Curiosity rover is exploring Hesperian-aged stratigraphy in Gale crater, Mars, where a transition from clay-bearing units to a layered sulfate-bearing unit has been interpreted to represent a major environmental transition of unknown c…
View article: FIRST INSIGHTS ON DEPOSITIONAL ENVIRONMENTS RECORDED IN THE "CLAY-SULFATE" TRANSITION AT GALE CRATER
FIRST INSIGHTS ON DEPOSITIONAL ENVIRONMENTS RECORDED IN THE "CLAY-SULFATE" TRANSITION AT GALE CRATER Open
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View article: HOUSEDON HILL - A CHEMCAM RMI MEGA MOSAIC TO INVESTIGATE DISTANT FEATURES IN GALE CRATER
HOUSEDON HILL - A CHEMCAM RMI MEGA MOSAIC TO INVESTIGATE DISTANT FEATURES IN GALE CRATER Open
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View article: Radiometric Calibration Targets for the Mastcam-Z Camera on the Mars 2020 Rover Mission
Radiometric Calibration Targets for the Mastcam-Z Camera on the Mars 2020 Rover Mission Open
The Mastcam-Z Camera is a stereoscopic, multispectral camera with zoom capability on NASA’s Mars-2020 Perseverance rover. The Mastcam-Z relies on a set of two deck-mounted radiometric calibration targets to validate camera performance and …
View article: Dust cover on Curiosity's Mars Hand Lens Imager (MAHLI) calibration target: Implications for deposition and removal mechanisms
Dust cover on Curiosity's Mars Hand Lens Imager (MAHLI) calibration target: Implications for deposition and removal mechanisms Open
We assessed dust coverage on the Mars Science Laboratory Mars Hand Lens Imager (MAHLI) and Alpha Particle X-Ray Spectrometer (APXS) calibration targets from 14 MAHLI images acquired at <100 μm/pixel, between Mars Science Laboratory Curiosi…
View article: Using deconvolution and machine learning to improve MSL Curiosity images: application to ChemCam and MAHLI
Using deconvolution and machine learning to improve MSL Curiosity images: application to ChemCam and MAHLI Open
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View article: Distribution of primary and secondary features in the Pahrump Hills outcrop (Gale crater, Mars) as seen in a Mars Descent Imager (MARDI) “sidewalk” mosaic
Distribution of primary and secondary features in the Pahrump Hills outcrop (Gale crater, Mars) as seen in a Mars Descent Imager (MARDI) “sidewalk” mosaic Open
The Mars Science Laboratory Curiosity rover conducted a reconnaissance traverse across the Pahrump Hills outcrop within Gale crater from Sols 780–797. During the traverse, the Mars Descent Imager (MARDI) acquired a continuous imaging recor…
View article: Diverse Lithologies and Alteration Events on the Rim of Noachian‐Aged Endeavour Crater, Meridiani Planum, Mars: In Situ Compositional Evidence
Diverse Lithologies and Alteration Events on the Rim of Noachian‐Aged Endeavour Crater, Meridiani Planum, Mars: In Situ Compositional Evidence Open
We report the results of geological studies by the Opportunity Mars rover on the Endeavour Crater rim. Four major units occur in the region (oldest to youngest): the Matijevic, Shoemaker, Grasberg, and Burns formations. The Matijevic forma…
View article: The Thermophysical Properties of the Bagnold Dunes, Mars: Ground-truthing Orbital Data
The Thermophysical Properties of the Bagnold Dunes, Mars: Ground-truthing Orbital Data Open
In this work, we compare the thermophysical properties and particle sizes derived from the Mars Science Laboratory (MSL) rover's Ground Temperature Sensor (GTS) of the Bagnold dunes, specifically Namib dune, to those derived orbitally from…
View article: In situ detection of boron by ChemCam on Mars
In situ detection of boron by ChemCam on Mars Open
We report the first in situ detection of boron on Mars. Boron has been detected in Gale crater at levels <0.05 wt % B by the NASA Curiosity rover ChemCam instrument in calcium‐sulfate‐filled fractures, which formed in a late‐stage groundwa…
View article: The Mars Science Laboratory (MSL) Mast cameras and Descent imager: Investigation and instrument descriptions
The Mars Science Laboratory (MSL) Mast cameras and Descent imager: Investigation and instrument descriptions Open
The Mars Science Laboratory Mast camera and Descent Imager investigations were designed, built, and operated by Malin Space Science Systems of San Diego, CA. They share common electronics and focal plane designs but have different optics. …
View article: The Mars Science Laboratory <i>Curiosity</i> rover Mastcam instruments: Preflight and in‐flight calibration, validation, and data archiving
The Mars Science Laboratory <i>Curiosity</i> rover Mastcam instruments: Preflight and in‐flight calibration, validation, and data archiving Open
The NASA Curiosity rover Mast Camera (Mastcam) system is a pair of fixed‐focal length, multispectral, color CCD imagers mounted ~2 m above the surface on the rover's remote sensing mast, along with associated electronics and an onboard cal…
View article: Redox stratification of an ancient lake in Gale crater, Mars
Redox stratification of an ancient lake in Gale crater, Mars Open
The depths of an ancient lake on Mars Gale crater on Mars was once a lake fed by rivers and groundwater. Hurowitz et al . analyzed 3.5 years of data from the Curiosity rover’s exploration of Gale crater to determine the chemical conditions…