A5059175126- Astro and Planetary Science
- Planetary Science and Exploration
- Seismic Waves and Analysis
- Spacecraft and Cryogenic Technologies
- Earthquake Detection and Analysis
- Space Exploration and Technology
- Methane Hydrates and Related Phenomena
- Seismology and Earthquake Studies
- Ionosphere and magnetosphere dynamics
- Space Satellite Systems and Control
- Stellar, planetary, and galactic studies
- Geology and Paleoclimatology Research
- Underwater Acoustics Research
- Space Science and Extraterrestrial Life
- Underwater Vehicles and Communication Systems
- Isotope Analysis in Ecology
- Seismic Imaging and Inversion Techniques
- Geophysics and Sensor Technology
- Meteorological Phenomena and Simulations
- Solar and Space Plasma Dynamics
- earthquake and tectonic studies
- Astrophysics and Star Formation Studies
- Combustion and Detonation Processes
- Spacecraft Design and Technology
- Geological and Geochemical Analysis
Sandia National Laboratories
2022-2025
Western University
2015-2024
Boston Medical Center
2024
Sandia National Laboratories California
2022
Purdue University West Lafayette
2022
Southwest Research Institute
2021
Johns Hopkins University Applied Physics Laboratory
2021
John Brown University
2021
Northern Arizona University
2021
Brown University
2017-2019
Doppler weather radar imaging enabled the rapid recovery of Sutter's Mill meteorite after a rare 4-kiloton TNT-equivalent asteroid impact over foothills Sierra Nevada in northern California. The recovered meteorites survived record high-speed entry 28.6 kilometers per second from an orbit close to that Jupiter-family comets (Tisserand's parameter = 2.8 ± 0.3). is regolith breccia composed CM (Mighei)-type carbonaceous chondrite and highly reduced xenolithic materials. It exhibits...
Abstract The Košice meteorite fall occurred in eastern Slovakia on February 28, 2010, 22:25 UT . very bright bolide was imaged by three security video cameras from Hungary. Detailed light curves were obtained through clouds radiometers seven of the European Fireball Network. Records sonic waves found six seismic and four infrasonic stations. An atmospheric dust cloud observed next morning before sunrise. After careful calibration, records used to compute trajectory velocity. meteoroid,...
Two bolides (2 June 2016 and 4 April 2019) were detected at multiple regional infrasound stations with many of the locations receiving detections. Analysis received signals was used to estimate yield, location trajectory, type shock that produced signal. The results from analysis compared ground truth information collected through other sensing modalities. This multi-modal framework offers an expanded perspective on processes governing bolide generation propagation. majority signal features...
Summary The ability to detect low frequency sounds from distant energetic events depends on the temperature and wind structure of atmosphere. Thus, time surface-based acoustic detectors may not be able capture arriving certain directions. However, minimum at tropopause create an duct called “AtmoSOFAR” channel that could transmit waves laterally – but perhaps ground. If true, then elevated sensors such as those borne aloft by balloons would record signatures even in regions where ground...
Abstract The Novato L6 chondrite fragmental breccia fell in California on 17 October 2012, and was recovered after the Cameras for Allsky Meteor Surveillance ( CAMS ) project determined meteor's trajectory between 95 46 km altitude. final fragmentation from 42 to 22 altitude exceptionally well documented by digital photographs. first sample before rain hit area. First results a consortium study of meteorite's characterization, cosmogenic radiogenic nuclides, origin, conditions fall are...
Abstract– The Grimsby meteorite (H4–6) fell on September 25, 2009. As of mid‐2010, 13 fragments totaling 215 g have been recovered. Records the accompanying fireball from Southern Ontario Meteor Network, including six all‐sky video cameras, a large format CCD, infrasound and radar records, used to characterize trajectory, speed, orbit, initial mass meteoroid. From four highest quality entry velocity was 20.91 ± 0.19 km s −1 while derived radiant has local azimuth 309.40° 0.19° angle 55.20°...
Abstract We investigate various short-warning mitigation scenarios via fragmentation for a hypothetical impact of asteroid 2023 NT1, near-Earth object (NEO) that was discovered on July 15, two days after its closest approach to Earth 13. The passed by within ∼0.25 lunar distances, with ∼1 × 10 5 km and velocity 11.27 s −1 . Its size remains largely uncertain, an estimated diameter range 26–58 m most probable estimate 34 (JPL Sentry, September 15; weighted the NEO frequency distribution). If...
Infrasound measurements play a critical role in global bolide detection and accurate location determination. However, significant mismatches frequently emerge between observed back azimuth angles theoretical predictions derived from bolide’s brightest emission point, especially under shallow entry conditions. In such instances, elongated acoustic traces across multiple trajectory segments induce large variations residuals. An investigation to quantifies the effects of varying on...
Abstract Two bolides (2016 June 2 and 2019 April 4) were detected at multiple regional infrasound stations, with many of the locations receiving detections. Analysis received signals was used to estimate yield, location, trajectory, as well type shock that produced signal. The results from analysis compared ground-truth information collected through other sensing modalities. This multimodal framework offers an expanded perspective on processes governing bolide generation propagation....
The influx rate of meteoroids hitting the Earth is most uncertain at sizes ∼10 m. Here we make use historical data large bolides recorded infrasonically over a period 13 years by U.S. Air Force Technical Applications Center (AFTAC) to refine terrestrial these sizes. Several independent techniques were applied airwave calculate bolide kinetic energies. At low energies our flux results are within factor two in agreement with previous estimates. For 5–20‐m diameter objects, however,...
Abstract The megaregolith of the Moon is upper region crust, which has been extensively fractured by intense impact bombardment. Little known about formation and evolution lunar megaregolith. Here we implement Grady‐Kipp model for dynamic fragmentation into iSALE shock physics code. This implementation allows us to directly simulate tensile in situ crust. We find that fragment sizes are weakly dependent on impactor size velocity. For impactors 1 km diameter or smaller, a hemispherical zone...
The fireball producing a crater‐forming meteorite fall near Carancas, Peru, on 15 September 2007 has been analyzed using eyewitness, seismic, and infrasound records. impact, which produced crater of 13.5 m diameter, is found to have released order 10 J energy, equivalent ∼2–3 tons TNT high explosives based infrasonic measurements. Our best fit trajectory solution places the radiant at an azimuth 82° relative crater, with entry angle from horizontal 63°. From modeling energetics constraints,...
[1] We present analysis of infrasonic signals produced by a large Earth-impacting fireball, believed to be among the most energetic instrumentally recorded during last century that occurred on 8 October, 2009 over Indonesia. This extraordinary event, detected 17 stations global International Monitoring Network, generated stratospherically ducted infrasound returns at distances up 500 km, greatest range which from fireball has been since 1908 Tunguska explosion. From these records, we find...
We performed numerical simulations of impact crater formation on Europa to infer the thickness and structure its ice shell. The were using iSALE test both conductive shell over ocean lid warm convective scenarios for a variety conditions. modeled depth-diameter is strongly dependent thermal gradient temperature ice. Our results indicate that fully (thin) conductive-convective (thick) can reproduce observed morphologies. For ocean, best fit an approximately 8 km thick Depending (255 - 265 K)...
Titan is unique in the solar system: it an ocean world, icy organic and has a dense atmosphere. It geologically active world as well, with ongoing exogenic processes, such rainfall, sediment transportation deposition, erosion, possible endogenic tectonism cryovolcanism. This combination of makes prime target for astrobiological research, biosignatures may be present its surface, impact melt deposits cryovolcanic flows, well deep ice water underneath outer shell. Impact craters are important...
In recent years, high-altitude infrasound sensing has become more prolific, demonstrating an enormous value especially when utilized over regions inaccessible to traditional ground-based sensing. Similar detectors, airborne sensors take advantage of the fact that impulsive atmospheric events such as explosions can generate low frequency acoustic waves, also known infrasound. Due negligible attenuation, infrasonic waves travel long distances, and provide important clues about their source....
Research Article| December 01, 2023 Lunar Impact Features and Processes Gordon R. Osinski; Osinski Department of Earth Sciences, University Western Ontario, 1151 Richmond St., London, ON, N6A 5B7, CanadaInstitute for Space Exploration, CanadaCanadian Network, Canada gosinski@uwo.ca Search other works by this author on: GSW Google Scholar H. Jay Melosh; Melosh Jeff Andrews-Hanna; Andrews-Hanna Planetary Lab, Arizona, Tucson, AZ 85721, USA David Baker; Baker Geology, Geophysics Geochemistry...
Abstract Sample return capsules (SRCs) entering Earth’s atmosphere at hypervelocity from interplanetary space are a valuable resource for studying meteor phenomena. The 2023 September 24 arrival of the Origins, Spectral Interpretation, Resource Identification, and Security-Regolith Explorer SRC provided an unprecedented chance geophysical observations well-characterized source with known parameters, including timing trajectory. A collaborative effort involving researchers 16 institutions...
Our simulations suggest that PI ("Pulverize It"), a NASA Phase II NIAC study, is an effective multi-modal approach for planetary defense can operate in extremely short interdiction modes (with intercepts as hours prior to atmospheric entry) well long time scales with months years of warning. The basic process complete disruption the threat via fragmentation. In scenarios sufficiently warning time, fragment cloud spreads enough miss Earth, resulting no ground effects. "worst-case" where...