Barry Barish helped turn LIGO from an interferometer proposal into an operating large-scale gravitational wave observatory. He directed its construction and early operation and established the broader LIGO Scientific Collaboration.[ref]
The scientific architecture combines sensitive laser interferometers at widely separated sites. A candidate astronomical signal must be distinguished from local disturbances, using its relative arrival times and its consistency with the detectors' responses. This made instrumental performance, calibration and cross-site comparison inseparable from the eventual measurement.[ref]

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Barry Barish is an American physicist renowned for his contributions to experimental physics, particularly in the field of gravitational wave research. He played a pivotal role in the development of the Laser Interferometer Gravitational-Wave Observatory (LIGO), which made history in 2015 by detecting gravitational waves for the first time, a groundbreaking achievement that confirmed a major prediction of Einstein's general theory of relativity.