极光全辐射波段区域时变模型

The spatial environments have significant influence in national defense and military, aeronautics and astronautics, society and individual livelihood. Particularly, the bad space weather will do destructive damage to high technological systems both on ground and in space. Aurora is the most typical phenomenon to directly signify the variation of space environments. It happens when solar particles penetrate into earth magnetosphere, collide with the upper atmospheric particles to be excited in polar region. The excitation intensity and radiation spectra are both closely related to the variation of space environments. Therefore, the according research is widely applied in the observation and warning for space environments. For example, the applications includes DMSP satellite, FY-3D satellite, Antarctic aurora spectrometers in Meridian Project and so on. On the basis of space- and ground-based observation systems, this project utilizes the auroral visible spectra data of Chinese Meridian Project for a reverse method to obtain the complete aurora radiation spectra consisting of ultraviolet, visible and infrared spectrum. In combination with the reaction process how the solar winds under different activity levels collide the atmosphere at high altitude in horizontal and vertical direction, this project simulates auroral ionospheric complete radiation spectrum in large scale by using high performance parallel computing. It evaluates the validity with space-based ultraviolet/infrared parts of auroral spectrum and explores aurora activities for the observation and warning of space environments in the upcoming 25th solar cycle. This project provides certain technical support for national defense, military, aerospace and other industries, thus has important academic significance and practical value. Besides, it has considerable economic benefits to be widely used in ground- and space-based observations.

空间环境对国防军事、航空航天、社会民生都有着巨大的影响，恶劣空间天气对空间、地面的高技术系统会造成严重破坏。极光是空间环境变化最直接指示现象，产生于太阳风粒子进入磁层与极区高空大气粒子碰撞激发，其激发强度、激发光谱紧密反应空间环境变化，被广泛应用于空间环境监测和预警（美国DMSP、中国风云3D、子午工程南极极光光谱仪等）。本项目基于天基、地基极光观测体系，利用我国国家重大科学工程“子午工程”极光可见光谱段数据，研究极区极光紫外-可见光-红外全谱段辐射反演方法；并结合不同太阳风活动水平下磁层太阳风粒子与高空大气碰撞的反应过程，高性能并行计算模拟电离层大时空尺度极光全谱段辐射，利用天基紫外/红外极光数据进行评估。利用该模型可以针对即将到来的第25太阳周活动，开展极光活动对空间环境的监测和预警研究。该研究能为我国航空航天、国防军事等提供技术支撑，具有重要的学术意义、实用价值和经济效益。

空间环境对国防军事、航空航天、人类社会发展都有着重大意义。极光作为空间环境变化的最直接指示现象，其产生伴随的大量粒子流、电磁波、X射线可能对卫星、地面无线通信、电力网系统造成不可逆的破坏。本项目基于天基、地基极光观测体系，利用我国国家重大科学工程“子午工程”极光可见光谱段数据，分析时变超高分辨率极光光谱图像，实现光谱图像特征谱线定标与细化及光强转换，揭示极光产生过程中电离层高度大气时变演化过程。针对不同极光事件并行仿真不同电子能通量下的极光时变模型，模拟极光时变活动，分析不同时间间隔下的光谱图像成像结果，模拟不同能量生成的光谱强度，利用光学辐射信息反演粒子源特性。结合水平和垂直方向上的气象学知识构建适用于大规模空间范围内的极光全辐射波段区域时变模型，结合卫星对地观测数据对全波段辐射模型进行有效性评估，利用高性能并行计算技术提高光谱数据处理分析、仿真模型推演全波段辐射的算法效率，实现极光/日地活动快速分析。理论结合实际，开发地基极光数据压缩传输分析软件、南极中山站极光光谱仪数据传输分析平台和极光数据传输软件，目前已应用于我国极地科考。本项目研究基于现有观测体系以合理的研究成本为我国航空航天、国防军事等事业提供一定技术支撑，具有重要的学术意义和实用价值，并能够应用于地基和天基观测中，具有一定的经济效益。