2.2.4 spase://SMWG/Observatory/Ground/CTIO CTIO 2019-05-05T12:34:56Z The facilities of Cerro Tololo Inter-American Observatory (CTIO), part of the U.S. National Optical Astronomy Observatory, continue to be the nucleus of U.S. astronomy in the Southern hemisphere. Cerro Tololo is located about 500km north of Santiago, Chile spase://SMWG/Person/Stephen.Heathcote Scientist About the Cerro Tololo Inter-American Observatory http://ast.noao.edu/facilities/ctio/ Information about the CTIO. spase://SMWG/Observatory/GONG Earth.Surface GEO -30.169 70.804 2200