It will test the following three major engineering challenges: (1) active/adaptive optics in space (2) building of large structures by astronauts and (3) release of a spacecraft from ISS to a free-flying orbit. The goal of the test with the SHOUT is to warrant a spatial resolution of 0.01 arc-seconds using the active/adaptive optics. It would be scaled from the Space-SUBARU telescope so that the testing with the SHOUT would warrant the required specifications for the 10-meter Space-SUBARU construction on the ISS. SHOUT is an engineering prototype of 10-m Space Telescope (Space SUBARU Telescope). We also seek the possibility to release it from ISS after its perfection on orbit, so that it is free from the vibrations and gas contaminations on and around the ISS. It will be built and adjusted on the exposure module of the Japanese Experiment Module (JEM) of the International Space Station by using a robotic arm and the EVA of astronauts. SHOUT is a 1- m telescope for science education. These early missions being studied are space Hands-On Universe Telescope (SHOUT) and Orbiting Wide-angle Light-collector (OWL).
Initial activities can begin with two modest-sized telescopes soon after the ISS construction. For its first step, we envisioned an immediate extension of the Exposed Facility of ISS for building a “Work-bench” for this purpose. Ultimately, this study would plan a 10-or 20-meter class space telescope. We envisage that the second phase of the ISS after its initial construction can landmark a new era for both ISS and Space Sciences. Use of the ISS infra-structure including robotic arms and astronauts’ EVA would permit a construction of very large optical telescopes. A concept study to build great observatories on, and deploy from, the ISS is presented.
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