太阳深积分磁场观测中异常结构的改正

发布时间：2019-01-14 17:20

【摘要】：2012年,中国科学院国家天文台怀柔太阳观测基地建成了基于位移叠加技术的深积分实时太阳磁场观测系统,但随着观测的开展,发现在计算的磁图中有时会存在整体性的异常颗粒结构,这些结构显然不是太阳磁场结构.本文首先对其成因进行了仔细分析,认为这是由于在积分计算磁场数据的时候,采用了第1,2帧作为左右旋偏振图像的基准帧引起的,这两帧图像由于大气抖动或者其他原因,彼此会有一定的相对位移,而这种位移在左旋和右旋2个偏振态的数据相减的时候,就会产生颗粒状的异常结构.为此,本文提出了使用左右旋平均视场来代替单帧图像作为基准图像的方法,并给出了详细的实现方法.通过多角度的实验和数据分析,图像的视觉效果和数据统计结果都表明本文的改正方法简单且有效.
[Abstract]:In 2012, the Huairou Solar observation Base of the National Observatory of the Chinese Academy of Sciences built a deep integral real-time solar magnetic field observation system based on displacement superposition technology, but with the development of the observation, It is found that there are some anomalous particle structures in the calculated magnetic maps, which are obviously not the solar magnetic field structures. In this paper, the cause of formation is carefully analyzed, and it is considered that this is caused by the use of frame 1 or 2 as the reference frame of the left and right rotation polarization image when the magnetic field data is calculated by the integral. These two frames are caused by atmospheric jitter or other reasons. There is a certain relative displacement between each other, and when the two polarization states of left and right are subtracted, there will be a granular abnormal structure. For this reason, this paper proposes a method to replace the single frame image with the left and right rotation mean field of view, and gives a detailed implementation method. Through multi-angle experiments and data analysis, the visual effect and statistical results of the image show that the proposed correction method is simple and effective.
【作者单位】：昆明理工大学云南省计算机技术应用重点实验室;中国科学院太阳活动重点实验室;
【基金】：国家自然科学基金(11203011,11263004,11163004,10903015,U1231205)资助
【分类号】：P182.2

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