Grand Observatories and multiple-OWL for high energy neutrino astrophysics

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Astronomical And Space-Research Instrumentation, Spaceborne And Space Research Instruments, Apparatus, And Components

Scientific paper

A possible ``Space Factory'' on the International Space Station (ISS) for ``Grand Observatories'' would permit a large astrophysical observatory in space. Grand-Observatories could revolutionize the great observatories that were hitherto pre-assembled and deployed by the Space Transportation System (STS). The concept of the ISS-Space-Factory envisages a plan of orbital construction, fine-tuning and deployment of large-scale astrophysical instruments into the desired free-flying orbit. It incorporates physical aids of the robotics arms and Extra-Vehicular Activities (EVA) of astronauts. This concept study also examines the necessary infrastructure on ISS for manufacturing a large spaceship for future deployment to the Moon, Mars and other interplanetary destinations. We envision a step-by-step advancement of the ``Space Factory'' with the most frontier astrophysical programs. Less demanding experiments could precede the construction of the most demanding optical telescopes. Multiple-OWL (Orbiting-array of Wide-angle Light collector) has very forgiving optical resolution (~0.1 degrees) and would be suitable for the first generation payload to be built on, and deployed from, the ISS. This system is an earth's night-sky-watcher for observing the highest energy cosmic rays and other atmospheric phenomena and is currently in the SEU Explorer Concept. Using the Space Factory, this collector can drastically advance its capacity to cover a 120° Field-of-View (FOV) in which the entire horizon of the earth (~6000 km diameter) can be viewed from a low-earth orbit (~1000 km). We have already developed a revolutionary, wide-angle Fresnel-lens optic in the OWL program and the Multiple-OWL can use several units of them. As one of the Grand Observatories, the proposed Multiple-OWL satellite can open a new window for observational universe in terms of high energy neutrino astrophysics. The OWL may also be used for monitoring earth-threatening meteorites if flipped on orbit at daytime for deep space observation.

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