| 求解CCD图像几何扭曲的初步结果 |
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| 引用本文： | 彭青玉,涂兵.求解CCD图像几何扭曲的初步结果[J].中国科学:物理学 力学 天文学,2011(9):1126-1130. |
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| 作者姓名： | 彭青玉 涂兵 |
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| 作者单位： | [1]暨南大学计算机科学系,广州510632 [2]暨南大学天体测量、动力学与空间科学中法联合实验室,广州510632 [3]光电信息与传感技术广东普通高校重点实验室（暨南大学）,广州510632 |
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| 基金项目： | 国家自然科学基金（批准号：10973007）; 暨南大学中央高校基本科研业务费专项资金资助项目 |
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| 摘 要： | 准确求解望远镜成像系统中视场的几何扭曲是高精度天体测量中的关键环节.借鉴哈勃空间望远镜几何扭曲求解的思想,提出并实施了一种简便、有效的方法.应用到云南天文台1米望远镜2011年4月2～3日观测疏散星团M67所得的72幅CCD图像表明：望远镜存在明显的几何扭曲效应,在视场角落最大扭曲～0.6pixel（～120mas）.经扭曲改正后,视场中星象的定位精度有了明显提高.
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| 关 键 词： | 几何扭曲 CCD成像 几何定标 |
Preliminary results of solving geometric distortions for a CCD image |
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| PENG QingYu,＆ TU Bing.Preliminary results of solving geometric distortions for a CCD image[J].Scientia Sinica Pysica,Mechanica & Astronomica,2011(9):1126-1130. |
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| Authors: | PENG QingYu ＆ TU Bing |
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| Institution: | 1 Department of Compute Science,Jinan University,Guangzhou 510632,China;2 Sino-France Joint Laboratory for Astrometry,Dynamics and Space Science,Jinan University,Guangzhou 510632,China;3 Key Laboratory of Optoelectronic Information and Sensor Technologies of Guangdong Higher Educational Institutes,Jinan University,Guangzhou 510632,China |
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| Abstract: | It is crucial to solve accurately the geometric distortion of a field of view for high precision astrometry.A convenient approach is proposed in this paper using the reference for the solution of equivalent to the Hubble Space Telescope（HST）.Based on the 72 CCD exposures taken for the open cluster M67（NGC2682） on April 2-3,2011 by the 1-m telescope at the Yunnan Observatory,obvious geometric distortions are found for the telescope with maximum distortion ～0.6 pixel（～120 mas） at the corner of field of view.After correcting the distortion,the measurement precision of stellar positions has significantly improved. |
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| Keywords: | geometric distortions CCD imaging astrometric calibration |
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