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- The Kopp–Etchells effect is a sparkling ring or disk that is sometimes produced by rotary-wing aircraft when operating in sandy conditions, particularly near the ground at night. The name was coined by photographer Michael Yon to honor two soldiers who were killed in combat; Benjamin Kopp, a US Army Ranger, and Joseph Etchells, a British soldier. Both were killed in combat in Sangin, Afghanistan in July 2009. Other names that have been used to describe this phenomenon include scintillation, halo effect, pixie dust, and corona effect. (en)
- L'effet Kopp-Etchells est un anneau ou un disque étincelant qui est parfois produit par les aérogires lorsqu'ils opèrent dans des conditions désertiques, en particulier près du sol la nuit. Le nom de cet effet a été inventé par le photographe (en) pour honorer deux soldats tués au combat (Benjamin Kopp et Joseph Etchells) morts au combat en juillet 2009 en Afghanistan. (fr)
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- The Kopp–Etchells effect is a sparkling ring or disk that is sometimes produced by rotary-wing aircraft when operating in sandy conditions, particularly near the ground at night. The name was coined by photographer Michael Yon to honor two soldiers who were killed in combat; Benjamin Kopp, a US Army Ranger, and Joseph Etchells, a British soldier. Both were killed in combat in Sangin, Afghanistan in July 2009. Other names that have been used to describe this phenomenon include scintillation, halo effect, pixie dust, and corona effect. (en)
- L'effet Kopp-Etchells est un anneau ou un disque étincelant qui est parfois produit par les aérogires lorsqu'ils opèrent dans des conditions désertiques, en particulier près du sol la nuit. Le nom de cet effet a été inventé par le photographe (en) pour honorer deux soldats tués au combat (Benjamin Kopp et Joseph Etchells) morts au combat en juillet 2009 en Afghanistan. (fr)
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- Effet Kopp-Etchells (fr)
- Kopp–Etchells effect (en)
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