Global ETD Search
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Showing 1 to 6 of 6 for “"terrestrial impact"”.
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Impact induced porosity of terrestrial impact craters : a gravity study of Meteor Crater.
… Crater that were induced by the crater-forming impact event. We performed a gravity survey at the crater and merged these new data with legacy gravity survey data. From the resulting merged gravity data set, we generated a reduced anomaly map and created a model to estimate the gravitational …
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Discovering and characterising compact mergers in wide-field surveys
… Response System (Pan-STARRS) and the Asteroid Terrestrial-impact Last Alert System (ATLAS), searches for compact mergers, including kilonovae, have been performed. The Pan-STARRS search identified two rapidly evolving transients with similar decline rates to the first kilonova, AT2017gfo, in …
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NEOimpactor: a tool for assessing Earth's vulnerability to the NEO impact hazard
… Objects (NEOs)<br/>and they present a very real impact threat to the Earth. In 1998 NASA inaugurated<br/>the ‘Spaceguard Survey’ to catalogue 90% of NEOs greater than 1 km in diameter. The<br/>smaller bodies, meanwhile, remain undetected and far more numerous.<br/><br/>In order to understand the …
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Finite-element modeling of large impact craters: Implications for the size of the Vredefort structure and the formation of multiple ring craters
Impact cratering is a complex process which is not yet fully understood, especially in the cases of large planetary events. Most of the observations of impact craters created by such events are limited to remote sensing of their surface morphology; although there are large terrestrial craters whose …
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Developing instrumentation and software for rapid follow-up and characterisation of near-Earth Asteroids
… Response System (PanSTARRS), and the Asteroid Terrestrial-impact Last Alert System (ATLAS). This project uses the robotic observing capabilities of the South African Astronomical Observatory's 1-meter telescope, Lesedi, equipped with the Mookodi instrument. Observations are scheduled in robotic …
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Applied Geochemistry, Geochronology and Biostratigraphy: Case Studies from the 38th Parallel Structures in Missouri and Orange Basin, Offshore Western South Africa
… organic matter) and radiometric dating of impact spherules were used to constrain age and a relationship between these enigmatic structures and infer their paleoenvironmental conditions. Novel melting damages, unique to impact, were documented in the palynomorphs in all the three …