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        Caltech Submillimeter
            Observatory California Institute
            of Technology

        Caltech Submillimeter Observatory


        CSO

         

        The Caltech Submillimeter Observatory (CSO) was formerly one of the world's premier facilities for astronomical research and instrumentation development at submillimeter wavelengths. The 10.4 m diameter telescope is housed in a compact dome at 4070 m altitude near the summit of Maunakea, Hawai'i.  CSO ceased scientific operations in 2015.  It will be decommissioned and the site restored.