Haystack Observatory

A facility in Massachusetts, NW of Boston, run by the Northeast Radio Observatory Corporation (NEROC) under agreement with the Massachusetts Institute of Technology. It has a 36.6-meter radio dish consisting of 96 stiff panel sections. The telescope is housed in a 45.7-meter diameter raydome, which reduces the effects of wind and rain; has a Cassegrain focus and an altazimuth mounting. It was originally used for radar astronomy, but is used mostly for spectral-line and VLBI work. It can observe in a selection of wavebands between 0.3 and 18 cm. At the shorter wavelengths the secondary mirror is deformed to take account of errors in the shape of the dish surface. The site contains a number of other radio and optical telescopes and radar antennas.

单词	haystack observatory
释义	Haystack Observatory Haystack Observatory A facility in Massachusetts, NW of Boston, run by the Northeast Radio Observatory Corporation (NEROC) under agreement with the Massachusetts Institute of Technology. It has a 36.6-meter radio dish consisting of 96 stiff panel sections. The telescope is housed in a 45.7-meter diameter raydome, which reduces the effects of wind and rain; has a Cassegrain focus and an altazimuth mounting. It was originally used for radar astronomy, but is used mostly for spectral-line and VLBI work. It can observe in a selection of wavebands between 0.3 and 18 cm. At the shorter wavelengths the secondary mirror is deformed to take account of errors in the shape of the dish surface. The site contains a number of other radio and optical telescopes and radar antennas.
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