NVST的He I 10830 Å 通道高分辨率成像观测的实现

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	NVST的He I 10830 Å 通道高分辨率成像观测的实现
其他题名	Implementation of high resolution imaging observation of NVST's He I 10830 Angstrom channel
	孟伟杰
学位类型	硕士
导师	许方宇
	2024-07-01
学位授予单位	中国科学院大学
学位授予地点	北京
学位专业	天文技术与方法
关键词	红外探测器高分辨率成像色球红外成像数据处理方法
摘要	天文红外探测器的自主研发以及太阳的地基红外观测，是我国太阳物理和空间天气研究的重要内容。依托1m新真空太阳望远镜（NVST）实现红外太阳成像观测对于国内天文观测技术的研究和应用具有重要的意义和价值。本文工作涉及红外探测器、NVST的10830 Å成像观测通道的系统化数据处理以及利用活动区极紫外与10830 Å辐射强度关系间接验证观测数据的可靠性。第一，针对近红外相机对暗弱目标的观测，提出了一种基于多次积分读出的红外相机优化采样方法，针对cMOS相机的列固定模式噪声给出常规的小波数据处理的方法，介绍了自主研制的近红外相机的主要的性能参数和测试情况。第二，利用Lyot滤光器和自研红外相机完成了NVST的10830 Å近红外成像通道；基于实测数据，详细分析了10830 Å 观测实验中出现的薄膜干涉条纹成因和特性，并给出常规的数据处理方法；对近红外通道的数据处理进行了深入研究，搭建了红外成像数据的系统化的处理流程，并实现并行化处理。第三，以2023年6月5日AR13323活动区的EUV moss区为研究对象，结合SDO 的多波段观测数据，分析并发现了极紫外与10830 Å辐射间的强度关系，并间接验证了NVST在10830 Å 观测数据的可靠性。本文最终成功实现了NVST的近红外通道在10830 Å对色球的窄带、高分辨率成像观测，大大提高了NVST的观测能力。借助高分辨率重建算法，NVST可以产出时间分辨率为10s、空间分辨率为0.3角秒，接近衍射极限的10830 Å的窄带像。
其他摘要	The independent research and development of astronomical infrared detectors and ground-based infrared observations of the Sun are important components of solar physics and space weather research in our country. Realizing infrared solar imaging observations with the 1-meter New Vacuum Solar Telescope (NVST) is of significant meaning and value for the research and application of astronomical observation technology within the nation. This work involves the infrared detector, the systematic data processing of the 10830 Å imaging observation channel of the NVST, and the indirect verification of the reliability of the observational data using the relationship between the extreme ultraviolet and 10830 Å radiation intensity in active regions: First, for the observation of faint targets with near-infrared cameras, an optimized sampling method for infrared cameras based on multiple integral readouts is proposed, and a conventional wavelet data processing method is given for the column fixed pattern noise of CMOS cameras, introducing the main performance parameters and testing of the self-developed near-infrared camera. Second, the 10830 Å near-infrared imaging channel of the NVST has been completed using a Lyot filter and a self-developed infrared camera; based on actual measurement data, the causes and characteristics of thin film interference fringes appearing in the 10830 Å observation experiments are analyzed in detail, and conventional data processing methods are given; an in-depth study of the data processing of the near-infrared channel has been conducted, establishing a systematic processing flow for infrared imaging data, and achieving parallel processing. Third, taking the EUV moss area in the AR 13323 active region on June 5, 2023, as the research object, combined with multi-band observation data from SDO, the intensity relationship between extreme ultraviolet and 10830 Å radiation has been analyzed and discovered, indirectly verifying the reliability of the NVST's 10830 Å observational data. This paper has successfully achieved narrowband, high-resolution imaging observations of the chromosphere at 10830 Å with the near-infrared channel of the NVST, greatly enhancing its observation capabilities. With the help of high-resolution reconstruction algorithms, the NVST can produce 10830 Å narrowband images with a time resolution of 10 s and a spatial resolution of 0.3'', close to the diffraction limit.
学科领域	天文学
学科门类	理学 ; 理学::天文学
页数	0
语种	中文
文献类型	学位论文
条目标识符	http://ir.ynao.ac.cn/handle/114a53/28014
专题	天文技术实验室
作者单位	中国科学院云南天文台
第一作者单位	中国科学院云南天文台
推荐引用方式 GB/T 7714	孟伟杰. NVST的He I 10830 Å 通道高分辨率成像观测的实现[D]. 北京. 中国科学院大学,2024.

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