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European Fireball Network is an international organization based in Central Europe (Germany and Czech Republic). Its purpose is systematic and simultaneous night observation of meteors and other nebular objects from several stations for scientific purposes. The network was initiated locally at the Ondřejov Observatory, Czech Republic, after the fall of the Příbram meteorite on 7 April 1959, which was the first meteorite simultaneously observed by several stations. By 1963, the network consisted of 5 stations. It was later (about 1968) expanded by the installation of about 15 new stations in Germany and named the European Fireball Network.〔 The network currently consists of at least 34 camera stations located in Germany, Czech Republic, Belgium, Luxembourg, Switzerland and Austria at elevations up to 1846 m above mean sea level. The cameras are separated by a distance of about ; they cover an area of about one million square kilometers and photograph the entire visible sky. Cameras of Czech stations are equipped with fisheye lenses and are directed towards the zenith. Sky recordings are made every night with a long exposure time. Quickly moving bright objects (meteors) appear as broken traces in the images, and from the exposure time, the burn time and the angular velocity of the object can be determined. An important feature of the network is the simultaneous observation of an object from several stations that allows accurate three-dimensional reconstruction of its trajectory using triangulation. The network is jointly operated by the German Aerospace Center (DLR) and the Institute of Planetary Research in Prague (Ondřejov Observatory). It produces about 10,000 images per year documenting about 1200 hours of clear sky observations. Its cameras detect about 50 large meteors per year.〔 (some excerpts )〕〔(European Fireball Network ) page at DLR (in German)〕 The most famous observation by the network is the fall of the Neuschwanstein meteorite on 6 April 2002. Detailed data obtained from several stations allowed accurate reconstruction not only of the meteor path in the Earth atmosphere, but also of its orbit around the Sun. The similarity of the reconstructed orbits of the Neuschwanstein and Příbram allowed associating these meteorites to the same parent body. ==See also== * Glossary of meteoritics 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「European Fireball Network」の詳細全文を読む スポンサード リンク
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