Proceedings PaperExtreme Universe Space Observatory (EUSO): an innovative space mission target-oriented to extreme energy cosmic ray and neutrino detection
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EUSO - Extreme Universe Space Observatory, is a precursor space mission aiming at important scientific objectives with an innovative instrumentation approach. For the first time an attempt will be done to detect Extensive Air Shower from space. EUSO will image the streak of the UV fluorescence light produced from the outer particles interacting with the Earth's atmosphere. The EUSO telescope, constituted by a large Fresnel optics and a finely segmented focal surface detector, will look downward from the ISS (International Space Station) the nocturnal atmosphere of the Earth. The 60 degrees of the optics Field Of View and the 400 km of altitude of the ISS, turn out a very large geometrical factor of the order of half million of km2 sr. An appropriate electronics design allows the use of a monocular telescope. The fast time resolution adopted and the single counting technique make possible to reconstruct the shower arrival direction and energy with high precision. EUSO is at the present under an ESA (European Space Agency) phase A evaluation study.