On August 15, 1977, Astronomer Jerry Ehman received a strong narrowband radio signal while he was working on a SETI project at the Big Ear radio telescope of The Ohio State University, then located at Ohio Wesleyan University's Perkins Observatory in Delaware, Ohio.
The entire signal sequence lasted for the full 72-second.
Dr. Jerry R. Ehman
Signal picked up by the Big Ear Radio Observatory on August 15, 1977, it wasn’t noticed until a few days later, when Ehman discovered the signal among the previous days’ logs.
Big Ear Radio Observatory-
The Big Ear observatory was a key element of Ohio State University’s SETI project, launched in 1961 to map radio signals including comets, quasars and nebulae from outside the galaxy.
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