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| radio interferometer | astroweb |   | array telescope |   |   |   |   |   | Type of radio telescope that relies on the use of two or more aerials at a distance from each other to provide a combination of signals from one source which can be analyzed by computer. Such an analysis results in a resolution that is considerably better than that of a parabolic dish aerial by itself because of the greater effective diameter. |   | 
| Very Large Array | NRAO Very Large Array | 1 arcsecond |   | VLA | radio interferometer | near Socorro, Atacama desert, New Mexico, USA | 82 feet |   | A radio telescope distributed along three 13-mile-long arms of a Y-shaped track. | 27 |