The Greenland Telescope is an international collaboration between: The Academia Sinica Institute of Astronomy and Astrophysics(TW)(project leaders) The Smithsonian Astrophysical Observatory of the Harvard–Smithsonian Center for Astrophysics (US) The National Radio Astronomy Observatory(US) The Haystack Observatory of the Massachusetts Institute of Technology(US) at an altitude of 3,210 meters (10,530 feet).