VLBA


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VLBA

Abbrev. for Very Long Baseline Array. A dedicated VLBI array run by the US National Radio Astronomy Observatory. It consists of ten identical dishes, each with a diameter of 25 meters, and a 20-station correlator (see correlation receiver); observations began in 1993. The dishes are at St Croix, VI, Hancock, NH, Liberty, IA, Fort Davis, TX, Los Alamos, NM, Pie Town, NM, Kitt Peak, AZ, Owens Valley, CA, Brewster, WA, and Mauna Kea, HI, giving a maximum baseline of 8600 km. The array is controlled remotely from a joint VLBA and VLA Array Operations Center in Socorro, New Mexico. It can observe in nine frequency bands between 327 MHz and 43 GHz, giving an angular resolution of up to 0.2 milliarcseconds. The dishes themselves are usable up to 86 GHz.