摘要

由磁场重联触发的发生在日冕和过渡区域上的具有高度动态的太阳爆发活动是灾害性空间天气的驱动源,对太阳爆发活动的空间成像和光谱分光测量是实现精准空间天气预报的关键数据来源。太阳大气上单离子氦的Lyman α跃迁产生波长30.4 nm的He II共振谱线,相比于邻近的谱线强度至少高出一个数量级,因此能够用来观测太阳爆发事件中的物质流动和能量输运过程。本文针对传统的太阳极紫外成像仪和成像光谱仪的缺陷,创新性地提出并设计了一款工作在He II 30.4nm波长处的二维光谱层析成像仪器,采用无狭缝的三个级次(-1、0、+1)同时衍射成像架构,单次快照可实现大视场的二维光谱瞬时成像。由于三个级次图像的空间信息和光谱信息混叠,利用有限层析投影角度的光谱数据反演算法,重构了观测目标的三维数据立方体I (x, y, λ).

  • 单位
    北京宇航系统工程研究所; 北京卫星环境工程研究所; 北京理工大学
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