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Brazilian Decimetric Array
The Brazilian Decimetric Array (BDA) is a 26-element radio telescope interferometer located in the municipality of Cachoeira Paulista in the state of São Paulo, Brazil. It is capable of performing both solar and stellar observations in three bands: 1.2 - 1.7, 2.8 and 5.6 GHz. The BDA will obtain radio images from the sun with a spatial resolution ~4x6 arc seconds.〔
The "T"-shaped BDA is being constructed in three phases. The first phase was a linear array of five parabolic antennas on alt-azimuth telescope mounts laid out on an east-west baseline of . The dishes were originally installed at the National Institute for Space Research (INPE) campus in São José dos Campos in 2003 for testing. They were moved to Cachoeira Paulista in 2004.〔 Beginning in 2010, the second phase was added. Nine antenna were placed on a new north-south baseline of , and twelve antenna were added to the original east-west baseline, extending it to a total of .〔 A third phase yet to be built will increase the number of antenna to 38. The final baselines will be 2.27 km in the east-west and 1.17 km in the north-south directions respectively.〔
==See also==
*Itapetinga Radio Observatory
*List of astronomical observatories
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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