| 采用光学指向系统建立天马13m望远镜指向模型 |
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| 引用本文： | 孙正雄,毛银盾,王锦清,罗浩,郑景辉,王广利.采用光学指向系统建立天马13m望远镜指向模型[J].天文学报,2023,64(4):38. |
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| 作者姓名： | 孙正雄 毛银盾 王锦清 罗浩 郑景辉 王广利 |
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| 作者单位： | 中国科学院上海天文台 上海 200030;中国科学院上海天文台 上海 200030;中国科学院射电天文重点实验室 南京 210023;上海市空间导航与定位技术重点实验室 上海 200030;中国科学院上海天文台 上海 200030;中国科学院大学 北京 100049 |
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| 基金项目： | 国家自然科学基金项目(11903068)资助 |
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| 摘 要： | 描述了采用光学望远镜辅助天马13m射电望远镜进行指向测量以及建立指向误差修正模型的方法. 对于小口径望远镜, 指向校准目标源比较少, 用射电法建立指向模型难以覆盖全天区. 利用上海天文台天马13m射 电望远镜进行光学望远镜辅助射电望远镜指向测量研究, 在13m天线背架上安装一套光学指向系统, 获得了优 于3''的重复测量误差. 此外, 通过对影响天线指向因素的分析, 建立了包含8个误差项的指向误差修正模型以及 光轴和电轴偏差模型. 将指向模型代入天线伺服控制系统, 对校准目标射电源进行十字扫描, 得到指向样本残差约 为5''. 该研究可以为实现高精度指向建模提供一种参考方法.
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| 关 键 词： | 射电望远镜 指向模型 光学辅助指向测量 方法: 数据分析 |
| 收稿时间： | 2022/5/18 0:00:00 |
Using the Optical Pointing System to Build the Pointing Model of the Tianma 13 m Telescope |
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| SUN Zheng-xiong,MAO Yin-dun,WANG Jin-qing,LUO Hao,ZHENG Jing-hui,WANG Guang-li.Using the Optical Pointing System to Build the Pointing Model of the Tianma 13 m Telescope[J].Acta Astronomica Sinica,2023,64(4):38. |
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| Authors: | SUN Zheng-xiong MAO Yin-dun WANG Jin-qing LUO Hao ZHENG Jing-hui WANG Guang-li |
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| Institution: | Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030;Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030;Key Laboratory of Radio Astronomy, Chinese Academy of Sciences, Nanjing 210023;Shanghai Key Laboratory of Space Navigation and Position Techniques, Shanghai 200030; Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030;University of Chinese Academy of Sciences, Beijing 100049 |
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| Abstract: | This paper describes the method of using the optical telescope to assist the Tianma 13m radio telescope for pointing measurement and establishing the pointing error correction model. For small-aperture telescopes, there are few target sources for pointing and calibration, and it is difficult to establish a pointing model by radio method to cover the whole sky area. The Tianma 13m radio telescope of Shanghai Astronomical Observatory is used to conduct optical-assisted pointing measurement research. A set of optical pointing system was installed on the back frame of Tianma 13m antenna, which obtained a repeatable measurement accuracy better than 3''. In addition, through the analysis of the factors affecting the antenna pointing, a pointing error correction model containing 8 error terms, as well as the optical axis and electrical axis deviation models were established. The pointing model was brought into the antenna servo control system to cross-scan the calibration target radio source, and a pointing error of about 5'' was obtained. This research can provide a reference method for high-precision pointing modeling. |
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| Keywords: | radio telescopes pointing model optically assisted pointing measurements methods: data analysis |
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