项目名称: 相位差法在太阳大视场多波段成像观测中的应用研究
项目编号: No.11203074
项目类型: 青年科学基金项目
立项/批准年度: 2013
项目学科: 天文学、地球科学
项目作者: 杨磊
作者单位: 中国科学院云南天文台
项目金额: 27万元
中文摘要: 对于当代实测太阳物理来说,为了能够全面地了解一个太阳活动区在太阳大气不同高度上的物理特性,于是对太阳望远镜提出了在高分辨成像模式下,对同一观测目标实现在光球和色球同步进行观测的要求。 针对这一要求,并结合目前在大视场太阳像图像处理技术遇到的问题和困难,本项目提出了对传统相位差法进行改造和扩展的研究:通过改造建立基于波长的多通道相位差法,以实现对同一观测目标在G_band、Tio和Hα3个波段进行高时空分辨率同步观测的要求;通过扩展将空不变系统下的传统相位差法扩展到空变系统下,直接实现对大视场非等晕的整体图像进行重建,避免由图像分割给图像重建带来的种种困难。 通过对传统相位差法的改造和扩展,本项目的最终目的是:在太阳塔的常规观测模式下,实现空间分辨率接近0.1角秒、时间分辨率达到5-10秒的大视场光球和色球的高时空分辨率的同步观测,为太阳物理的相关研究提供优质观测资料。
中文关键词: 大视场;多波段;高时空分辨率;同步观测;
英文摘要: To the contemporary observational solar physics, in order to comprehensively learn about the physical property of a solar active region on the different height of solar atmosphere, the solar telescope should be satisfied to observe the photosphere and the chromosphere for the same object synchronously, with the high spatial and temporal resolution imaging model. According to the requirement, and combining the problem and difficulty met during the reconstruction of the solar images with large view field, the aim of this project is to study the modification and expansion of the traditional method of phase diversity: through modifying and setting up the method of multiple channel phase diversity based on the wavelength, in order to the synchronous observation with high spatial and temporal resolution imaging mode in the wavelengh of G-band, Tio and Ha respectively, for the same object. To directly realize the reconstruction of anisoplanatic images of large view filed, avoiding all kinds of the difficulty due to the reconstruction of image segmentation, by expanding the traditional space invariant phase diversity model to the spatial variant imaging model. Through modifying and expanding the traditional method of phase diversity, the final aim of this project is to realize the synchronous observation of the photosp
英文关键词: large field of view;multi-wavelength;high spatial and temporal resolution;synchronous observation;