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"Doppler weather radar imaging enabled the rapid recovery of the Sutter’s Mill meteorite after a rare 4-kiloton of TNT–equivalent asteroid impact over the foothills of the Sierra Nevada in northern California. The recovered meteorites survived a record high-speed entry of 28.6 kilometers per second from an orbit close to that of Jupiter-family comets (Tisserand’s parameter = 2.8 ± 0.3). Sutter’s Mill is a regolith breccia composed of CM (Mighei)–type carbonaceous chondrite and highly reduced xenolithic materials. It exhibits considerable diversity of mineralogy, petrography, and isotope and organic chemistry, resulting from a complex formation history of the parent body surface. That diversity is quickly masked by alteration once in the terrestrial environment but will need to be considered when samples returned by missions to C-class asteroids are interpreted."
science  meteor  astronomy  meteorology  radar 
february 2013 by tsuomela
Dark Sky for iPhone and iPad
Dark Sky is a new kind of weather app. It uses state-of-the-art weather forecasting to predict when it will rain or snow — down to the minute — at your exact location, and presents it to you alongside the most beautiful radar visualizations you’ve ever seen.
apps  weather  meteorology  radar  iphone  ipad 
april 2012 by tsuomela

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