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Measurement and Correction of Pointing Error Caused by Radio Telescope Alidade Deformation based on Biaxial Inclination Sensor

文献类型：期刊论文

作者Xu, Qian1,2,3; Xue, Fei3; Wang, Hui3; Yi, Letian3
刊名MICROMACHINES
出版日期2023-07-01
卷号14期号:7页码:14
关键词inclinometer pointing errors radio telescope alidade thermal gradients track unevenness
DOI10.3390/mi14071283
通讯作者Xu, Qian(xuqian@xao.ac.cn)
英文摘要One of the key reasons for the deterioration of antenna pointing accuracy for radio telescopes is the deformation and tilt of antenna alidades, which primarily result from track unevenness and thermal gradients. A high-precision inclinometer measurement system is installed to investigate the tilt of the antenna alidade and the pointing errors caused thermally. An environment control box with a leveling base was designed to reduce the interference of the external environment, which proved to be effective in guaranteeing the zero-point stability and repeat accuracy of the inclinometer. The tilt of the alidade caused by the track unevenness was measured by a test of slowly rotating the antenna along the azimuth at windless nighttime. A 5-day antenna stationary test and a 48 h astronomical pointing error measurement were performed, which proved the inclinometer measurement system is capable of measuring the thermally induced inclinations with acceptable accuracy. Through a preliminary compensation experiment, the pointing error is compensated from 37 & DPRIME; to 12 & DPRIME;, which shows that the application of the system has a good effect on improving the pointing accuracy of the antenna. The system with high measurement accuracy, good system stability, and low computational complexity, proves an effective tool for the radio telescope to solve the problem of real-time measurement and compensation for antenna pointing errors.
资助项目Natural Science Foundation of Xinjiang Autonomous Region[2021D01B111] ; National Key Research and Development Program of China[2021YFC2203601] ; Youth Innovation Promotion Association, CAS[Y202019] ; Ministry of Finance of China (MOF) ; Scientific Instrument Developing Project of the Chinese Academy of Sciences[PTYQ2022YZZD01]
WOS研究方向Chemistry ; Science & Technology - Other Topics ; Instruments & Instrumentation ; Physics
语种英语
WOS记录号WOS:001073417000001
出版者MDPI
资助机构Natural Science Foundation of Xinjiang Autonomous Region ; National Key Research and Development Program of China ; Youth Innovation Promotion Association, CAS ; Ministry of Finance of China (MOF) ; Scientific Instrument Developing Project of the Chinese Academy of Sciences
源URL[http://ir.xao.ac.cn/handle/45760611-7/5451]  
专题射电天文研究室_天线技术实验室
新疆天文台_110米口径全可动射电望远镜（SmART）_技术成果
通讯作者Xu, Qian
作者单位1.Xinjiang Key Lab Radio Astrophys, Urumqi 830011, Peoples R China
2.Chinese Acad Sci Radio Astron, Key Lab, Urumqi 830011, Peoples R China
3.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China
推荐引用方式
GB/T 7714		 Xu, Qian,Xue, Fei,Wang, Hui,et al. Measurement and Correction of Pointing Error Caused by Radio Telescope Alidade Deformation based on Biaxial Inclination Sensor[J]. MICROMACHINES,2023,14(7):14.
APA Xu, Qian,Xue, Fei,Wang, Hui,&Yi, Letian.(2023).Measurement and Correction of Pointing Error Caused by Radio Telescope Alidade Deformation based on Biaxial Inclination Sensor.MICROMACHINES,14(7),14.
MLA Xu, Qian,et al."Measurement and Correction of Pointing Error Caused by Radio Telescope Alidade Deformation based on Biaxial Inclination Sensor".MICROMACHINES 14.7(2023):14.

入库方式： OAI收割

来源：新疆天文台

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