Institutional Repository of Radio Astronomy Research Laboratory
| A Conceptual Investigation of a Large Radio Telescope Support Point Number Effect on Its Pointing Accuracy | |
Xue, Song1; Ma, Kaitong1; Wang, Congsi1; Lian, Peiyuan1; Wang, Yan2; Yan, Yuefei1; Xu, Qian3 ; Zheng, Yuanpeng4; Wang, Na3
| |
| 2020-11-23 | |
| Source Publication | INTERNATIONAL JOURNAL OF ANTENNAS AND PROPAGATION
 |
| ISSN | 1687-5869 |
| Volume | 2020Pages:2706309 |
| Contribution Rank | 3 |
| Abstract | 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. |
| DOI | 10.1155/2020/2706309 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS Keyword | AZIMUTH-TRACK ; ERRORS |
| Funding Project | 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 Research Area | Engineering ; Telecommunications |
| WOS Subject | Engineering, Electrical & Electronic ; Telecommunications |
| WOS ID | WOS:000598505200001 |
| Publisher | HINDAWI LTD |
| Funding Organization | 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 |
| EI Accession Number | 20205109623073 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/3800 |
| Collection | 射电天文研究室_天线技术实验室 110米口径全可动射电望远镜（QTT）_技术成果 |
| Corresponding Author | Wang, Congsi |
| Affiliation | 1.Xidian Univ, Sch Mechanoelect Engn, Key Lab Elect Equipment Struct Design, Xian, Shaanxi, Peoples R China 2.Univ Architecture & Technol, Sch Informat & Control Engn, Xian, Shaanxi, Peoples R China 3.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 4.CETC 54 Res Inst, Shijiazhuang 050081, Hebei, Peoples R China |
| Recommended Citation 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. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| Xue-2020-A Conceptua（4295KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment