Very Long Baseline Array (VLBA)

The VLBA is the world's largest, full-time astronomical instrument, consisting of a series of 10 radio antennas spread out across North America from Hawaii to the Virgin Islands. Each antenna is 82 feet (25 meters) in diameter, weighs 240 tons, and is nearly as tall as a ten story building. The antennas, controlled by the Array Operations Center in Socorro, New Mexico, function together as one instrument with very high resolution and sensitivity. The data from each of the ten antennas are recorded onto magnetic discs and shipped to the Array Operations Center where they are combined in pairs in a correlator, the specialized supercomputer at the heart of an interferometer analogous to the VLA. The correlated data are then delivered to the astronomers who proposed the observations for further analysis. The VLBA was dedicated in 1993 and is used by astronomers around the world. For more information, please visit the VLBA home page.

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Ft. Davis


Kitt Peak

Los Alamos

Mauna Kea

N. Liberty

Owens Valley

Pie Town

St. Croix



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