The Ohio State University Radio Observatory was a Kraus-type radio telescope located on the grounds of the Perkins Observatory at Ohio Wesleyan University from 1963 to 1998. Known as Big Ear, the observatory was part of Ohio State University's Search for Extraterrestrial Intelligence project. Construction of the Big Ear began in 1956 and was completed in 1961, and it was finally turned on for the first time in 1963.
The main reflector of Big Ear — The Flat Reflector — measured approximately 103 metres by 33 metres, giving it the sensitivity equivalent to a circular dish measuring nearly 53 metres in diameter.
Source: Wikipedia.org
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