A Conceptual Investigation of a Large Radio Telescope Support Point Number Effect on Its Pointing Accuracy

doi:10.1155/2020/2706309

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	A Conceptual Investigation of a Large Radio Telescope Support Point Number Effect on Its Pointing Accuracy
	Xue, Song 2; Ma, Kaitong 2; Wang, Congsi 2; Lian, Peiyuan 2; Wang, Yan 4; Yan, Yuefei 2; Xu, Qian 3; Zheng, Yuanpeng 1; Wang, Na 3
刊名	INTERNATIONAL JOURNAL OF ANTENNAS AND PROPAGATION
	2020-11-23
卷号	2020 页码:2706309
ISSN号	1687-5869
DOI	10.1155/2020/2706309
产权排序	3
英文摘要	The purpose of this paper is to investigate a large radio telescope support point number effect on its pointing accuracy and provide a useful guideline for the large radio telescope design engineer. In a large radio telescope system, the azimuth track is used to support the whole telescope structure and the mounting error as well as the telescope wheel-track contact in a long term can cause unevenness on the azimuth track, which can further deteriorate the telescope pointing accuracy. Even though various compensation methods have been proposed to compensate for this pointing error, it remains as one of the challenges for the telescope pointing error reduction. In this paper, a general telescope pointing error estimation formula has been proposed to investigate different telescope support-point number designs on its pointing accuracy. In this approach, the azimuth track unevenness has been modelled as the Fourier function using the least square method after the raw track profile has been measured. Next, the elevation position matrix, azimuth position matrix, and the azimuth profile matrix can be constructed for different telescope support point numbers, and the telescope pointing error can then be obtained based on the proposed general formula. The telescope pointing error root mean square (RMS) value is used to quantify the effect of the telescope support point number on the pointing accuracy. Two interesting results can be observed in the numerical example. The first one is that the telescope pointing error curves have different dominant peaks during one azimuth track rotation, which is corresponding to the support point number. Another interesting finding is that the RMS value experienced a complex trend with the support point number change, and they are not a simple monotonous increasing or decreasing relationship with the support number. All the results in this paper can provide a useful guideline for reducing the telescope pointing error in the initial design stage.
资助项目	Natural Science Foundation of Shaanxi Province[2020JQ290] ; National Natural Science Foundation of China[51805399] ; Youth Science and Technology Star Project of Shaanxi Province[2018KJXX-047] ; Youth Innovation Team of Shaanxi Universities[201926]
WOS关键词	AZIMUTH-TRACK ; ERRORS
WOS研究方向	Engineering ; Telecommunications
语种	英语
出版者	HINDAWI LTD
WOS记录号	WOS:000598505200001
资助机构	Natural Science Foundation of Shaanxi Province ; National Natural Science Foundation of China ; Youth Science and Technology Star Project of Shaanxi Province ; Youth Innovation Team of Shaanxi Universities
内容类型	期刊论文
源URL	[http://ir.xao.ac.cn/handle/45760611-7/3799]
专题	射电天文研究室_天线技术实验室
通讯作者	Wang, Congsi
作者单位	1.CETC 54 Res Inst, Shijiazhuang 050081, Hebei, Peoples R China 2.Xidian Univ, Sch Mechanoelect Engn, Key Lab Elect Equipment Struct Design, Xian, Shaanxi, Peoples R China 3.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 4.Univ Architecture & Technol, Sch Informat & Control Engn, Xian, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Xue, Song,Ma, Kaitong,Wang, Congsi,et al. A Conceptual Investigation of a Large Radio Telescope Support Point Number Effect on Its Pointing Accuracy[J]. INTERNATIONAL JOURNAL OF ANTENNAS AND PROPAGATION,2020,2020:2706309.
APA	Xue, Song.,Ma, Kaitong.,Wang, Congsi.,Lian, Peiyuan.,Wang, Yan.,...&Wang, Na.(2020).A Conceptual Investigation of a Large Radio Telescope Support Point Number Effect on Its Pointing Accuracy.INTERNATIONAL JOURNAL OF ANTENNAS AND PROPAGATION,2020,2706309.
MLA	Xue, Song,et al."A Conceptual Investigation of a Large Radio Telescope Support Point Number Effect on Its Pointing Accuracy".INTERNATIONAL JOURNAL OF ANTENNAS AND PROPAGATION 2020(2020):2706309.