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题名: Accuracy Analysis of the Pointing and Focusing Calibration of the 5 m Terahertz Telescope for Dome A in Antarctica
作者: Kang Haoran; Zuo Yingxi; Lou Zheng; He Qianru
刊名: Acta Astronomica Sinica
出版日期: 2018
卷号: 59, 期号:2, 页码:17
英文摘要: Pointing calibration and sub-reflector focusing are important task of antenna measurements, which significantly contribute to the observational performance of radio telescopes. According to the pointing accuracy and defocusing gain loss requirements of the 5 m Dome A Terahertz Explorer (DATE5), this paper has derived the requirements of signal-to-noise ratio for pointing and sub-reflector focusing calibration observations, and selected several astronomical radio sources suitable in terahertz band for pointing and focusing calibrations in Antarctica, which include planets and ultracompact HII regions. The effects of the atmospheric absorption and the source angular diameter on the calibration-measurement errors are analyzed. Simulations show that, when the telescope operates in Antarctica, these sources could provide sufficient flux density for verifying the pre-established pointing model and the focusing model.
语种: 英语
WOS记录号: CSCD:6209187
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内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/18013
Appears in Collections:毫米波和亚毫米波技术实验室_期刊论文

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