Physics – Optics
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...205.4904c&link_type=abstract
American Astronomical Society Meeting 205, #49.04; Bulletin of the American Astronomical Society, Vol. 36, p.1419
Physics
Optics
Scientific paper
Pisgah Astronomical Research Institute is a not-for-profit public foundation that operates two 26 m radio telescopes. The telescopes are separated by 300 m on a nearly east-west baseline. The two alt-alt mounted 26 m radio telescopes have been completely refurbished with new motion controllers for precise pointing and tracking. The telescopes have completed a period which includes repeated observations of radio sources at 1420 MHz to improve pointing accuracy. The pointing models include parameters such as orthogonality of the axes, east-west axis orientation, and flexure. We present the results of the pointing models that have produced a factor of 10 improvement. Also, the prime focus assemblies will be described. The radio telescope on the west edge of the baseline has a 6.7 GHz receiver that occupies the center of the focal plane and a 1420 MHz receiver that is offset 20 arcminutes from the center. The eastern 26 m radio telescope has a 327 MHz receiver for pulsar research. The focus assemblies are rooms about 3 m on a side and contain power, fiber optics, and multiple coax signal cables which provide reconfiguration flexibility of multiple feeds and electronics assemblies.
Castelaz A. T.
Castelaz Michael W.
Cline Donald J.
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