KMS National Astronomical Observatories, CAS
| Effect of the alidade thermal behavior on the pointing accuracy of a large radio telescope | |
| Wei, Shan-Xiang1,2,3; Kong, De-Qing1,3; Wang, Qi-Ming2,3 | |
| 2021-08-01 | |
| Source Publication | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
 |
| ISSN | 1674-4527 |
| Volume | 21Issue:6Pages:10 |
| Abstract | The alidade's non-uniform temperature field of a large radio telescope is very obvious under solar radiation. Estimating a radio telescope's pointing errors, caused by the alidade deformation under solar radiation, is significant to improve the telescope's pointing accuracy. To study the effect of the alidade thermal behavior on the pointing accuracy of a large radio telescope, a temperature experiment is first carried out in a 70-m radio telescope on a sunny day. According to the measured results, the temperature distribution rule of the alidade is summarized initially. In addition, the alidade's temperature field is calculated by finite element thermal analysis. The simulated results are proved to be in good agreement with the experimental results. Finally, the alidade deformation under solar radiation is computed by finite element thermal-structure coupling analysis. The telescope's pointing errors caused by alidade deformation are estimated via the alidade's node displacements. The final results show that the effect of alidade thermal behavior on the telescope's elevation pointing errors Delta epsilon(2) + Delta epsilon(r) is much more than the effect on the telescope's cross-elevation pointing errors Delta epsilon(1). The maximum of Delta epsilon(2) + Delta epsilon(r) is more than 45 '', while the maximum of Delta epsilon(1) is less than 6 ''. This study can provide valuable references for improving the pointing accuracy of large radio telescopes. |
| Keyword | telescopes finite element analysis thermal behavior pointing accuracy |
| Funding Organization | National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences |
| DOI | 10.1088/1674-4527/21/6/137 |
| WOS Keyword | REFLECTOR ANTENNAS ; IMPROVEMENT |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[U1831114] ; National Natural Science Foundation of China[11673040] ; National Natural Science Foundation of China[11803053] ; Chinese Academy of Sciences[U1831114] |
| Funding Organization | National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:000684230300001 |
| Publisher | NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.bao.ac.cn/handle/114a11/76017 |
| Collection | 中国科学院国家天文台 |
| Corresponding Author | Kong, De-Qing; Wang, Qi-Ming |
| Affiliation | 1.Chinese Acad Sci, Natl Astron Observ, Key Lab Lunar & Deep Space Explorat, Beijing 100101, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, Key Lab FAST, Beijing 100101, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Wei, Shan-Xiang,Kong, De-Qing,Wang, Qi-Ming. Effect of the alidade thermal behavior on the pointing accuracy of a large radio telescope[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2021,21(6):10. |
| APA | Wei, Shan-Xiang,Kong, De-Qing,&Wang, Qi-Ming.(2021).Effect of the alidade thermal behavior on the pointing accuracy of a large radio telescope.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,21(6),10. |
| MLA | Wei, Shan-Xiang,et al."Effect of the alidade thermal behavior on the pointing accuracy of a large radio telescope".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 21.6(2021):10. |
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