Browsing by Author "Whelley, Patrick"
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Item Dataset for "Stratigraphic Evidence for Early Martian Explosive Volcanism in Arabia Terra"(2021) Richardson, Jacob; Whelley, Patrick; Matiella Novak, AlexandraSeven Digital Elevation Models (DEMs) in the Arabia Terra region, Mars, were created using spatially overlapping images (i.e., "stereo images") from the Context Camera (CTX) aboard the Mars Reconnaissance Orbiter (MRO). Each DEM location was selected to spatially overlap hyperspectral data acquired by the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) also aboard MRO. Elevation data from these DEMs were used to identify and measure geologic units that preserve minerals indicative of altered volcanic deposits. Stereophotogrammetry was performed using the Ames Stereo Pipeline toolkit v 2.6.0 and USGS ISIS Version 3.4.12.6662. Each DEM was aligned to the martian aeroid with Mars Orbiter Laser Altimeter Precision Experiment Data Records within the spatial footprint of the CTX DEM. DEM files are in the GeoTIFF raster format. Each raster has a sinusoidal projection coordinate system with a central longitude corresponding to the individual raster's center. For each CTX DEM, an ortho-rectified image was also produced. For naming conventions, references, and descriptions of each DEM site, see the enclosed readme.Item Field Mapping and Modeling of Terrestrial Lava Tube Magnetic Anomalies as an Analog for Lunar Lava Tube Exploration and Prospecting(Wiley, 2022-05-19) Bell, Ernest Jr.; Schmerr, Nicholas; Young, Kelsey; Esmaeili, Sanaz; Garry, W. Brent; Jazayeri, Sajad; Kruse, Sarah; Richardson, Jacob; Whelley, PatrickLava tubes are a commonplace feature on the terrestrial planets, and knowledge of tube size and location informs lava flow processes. Future exploration of lava tubes on the Moon can provide access to geologic environments that likely remain unaltered from their emplacement billions of years ago. Lunar lava tubes may also provide astronauts protection from thermal extremes, meteoroid impacts, and radiation. High-resolution magnetic identification and characterization of lava tubes can be used to help inform future scientific investigations of lava tubes for human exploration and utilization. We demonstrate how magnetometry is useful for determining the geometry and extent of lava tubes on the Earth and, by proxy, the Moon, by relating the magnetic anomalies produced by lava tubes to their location and geomorphology. Using a proton-precession total field magnetometer, we surveyed an area of more than 100,000 m2, with cross-tube linear traverses spaced at 3–5 m, perpendicular to an approximately 1,000 m length of the Modoc Crater lava tube complex, within the Lava Beds National Monument (California, USA). The observed magnetic anomalies of the sections known as Incline, Skull, and Ship Caves are compared against synthetic predictions, and the sensitivity of the magnetic anomalies to the tube geometry used to derive a basic relationship between the two. We use our model of terrestrial lava tube magnetic anomalies and adjust for the lunar magnetic environment to predict the signature of anomalies resulting from tubes on the Moon.Item LiDAR and Magnetic Data for: Field Mapping and Modeling of Terrestrial Lava Tube Magnetic Anomalies as an Analog for Lunar Lava Tube Exploration and Prospecting(2022) Bell, Ernest; Schmerr, Nicholas; Richardson, Jacob; Whelley, Patrick; Young, Kelsey; Garry, BrentArchived are Magnetic and LiDAR data collected at Lava Beds National Monument by the NASA funded TUBEX project (Dr. Kelsey Young – PI) in 2017 and 2018. The archived data are for a paper submitted to a JGR Planets special issue on Exploring Planetary Caves as Windows into Subsurface Geology, Habitability, and Astrology with the title: Field Mapping and Modeling of Terrestrial Lava Tube Magnetic Anomalies as an Analog for Lunar Lava Tube Exploration and Prospecting. We use observed data and detailed magnetic models to understand the practicality of mapping magnetic anomalies to determine lava tube locations and internal geometries within a lava flow.Item Skull Cave LiDAR Point Cloud - TubeX(2021) Whelley, Patrick; Garry, W. Brent; Young, Kelsey; Richardson, JacobArchived are Light Detection and Ranging (LiDAR) data collected at Lava Beds National Monument by the NASA funded TUBEX project (Dr. Kelsey Young – PI) and the “LiDAR-Team” in 2017 and 2018. This team was led by Dr. Patrick Whelley and included Drs. W. Brent Garry and Jacob Richardson as well as the rest of the TUBEX Team. The instrument used to collect the LiDAR data was a Riegl VZ-400 tripod mounted terrestrial laser scanner (TLS). The data are tiled for storage and ease of download.Item Terrestrial Scanning LiDAR of Kilbourne Hole Maar, Potrillo Volcanic Field, New Mexico(2019-10-23) Whelley, Patrick; Enriquez, Frankie; Richardson, Jacob; Hurtado, José; Young, Kelsey; Bleacher, JacobArchived are point clouds collected using the Goddard Instrument Filed Team's Riegl VZ-400, a Terrestrial Scanning LiDAR.