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The newly completed millimeter-wavelength array consists of six high-accuracy radio telescopes, each 10.4 meters (34 feet) in diameter. The individual telescopes can be moved to observing stations along a T-shaped railroad track and pointed toward the same object in space. By combining the detected signals through a process called interferometry, extremely high-definition pictures can be produced. As in all interferometry, the degree of detail achieved depends upon the distance between the telescopes; for example, a single dish with a diameter of 300 meters (about one fifth of a mile) would be required to match the resolution that can be obtained with these new instruments.
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White Mountain Trip 2004
