Accuracy Analysis of the Pointing and Focusing Calibration of the 5 m Terahertz Telescope for Dome A in Antarctica

	Accuracy Analysis of the Pointing and Focusing Calibration of the 5 m Terahertz Telescope for Dome A in Antarctica
	Kang Haoran; Zuo Yingxi; Lou Zheng; He Qianru
刊名	Acta Astronomica Sinica
	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
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/18013]
专题	中国科学院紫金山天文台
推荐引用方式 GB/T 7714	Kang Haoran,Zuo Yingxi,Lou Zheng,et al. Accuracy Analysis of the Pointing and Focusing Calibration of the 5 m Terahertz Telescope for Dome A in Antarctica[J]. Acta Astronomica Sinica,2018,59(2):17.
APA	Kang Haoran,Zuo Yingxi,Lou Zheng,&He Qianru.(2018).Accuracy Analysis of the Pointing and Focusing Calibration of the 5 m Terahertz Telescope for Dome A in Antarctica.Acta Astronomica Sinica,59(2),17.
MLA	Kang Haoran,et al."Accuracy Analysis of the Pointing and Focusing Calibration of the 5 m Terahertz Telescope for Dome A in Antarctica".Acta Astronomica Sinica 59.2(2018):17.