基于FY-3D电离层光度计数据开展夜间135.6nm辉光辐射强度对赤道环电流指数Dst的响应特性研究  

The research on the response characteristic of nighttime 135.6 nm airglow emission intensity to Dst index based on the data of the Ionosphere PhotoMeter(IPM)on FY-3D Satellite

作　　者：江芳 毛田[4] 付利平[1,2,3] 王劲松 胡秀清[4] 贾楠[1,2,3,5] 王天放[1,2,3,5] 李叶飞 JIANG Fang;MAO Tian;FU LiPing;WANG JinSong;HU XiuQing;JIA Nan;WANG TianFang;LI YeFei(National Space Science Center,Chinese Academy of Sciences,Beijing 100090,China;Beijing Key Laboratory of Space Environment Exploration,Beijing 100090,China;Key Laboratory of Environmental Space Situation Awareness Technology,Beijing 100090,China;National Satellite Meteorological Center,China Meteorological Administration,Beijing 100081,China;University of Chinese Academy of Sciences,Beijing 100049,China;Shanghai Satellite Engineering Research Institute,Shanghai 200240,China)

机构地区：[1]中国科学院国家空间科学中心空间环境探测研究室,北京100090 [2]天基空间环境探测北京市重点实验室,北京100090 [3]中国科学院空间环境态势感知技术重点实验室,北京100090 [4]国家卫星气象中心,北京100081 [5]中国科学院大学,北京100049 [6]上海卫星工程研究所,上海200240

出　　处：《地球物理学报》2024年第7期2496-2505,共10页Chinese Journal of Geophysics

基　　金：国家重点研发计划(2022YFF0503901);国家自然科学基金(41874187,42174226)项目资助。

摘　　要：远紫外气辉探测仪小型电离层光度计IPM于2017年11月15日随FY-3D卫星发射升空.IPM通过对地测量夜间O+和电子辐射复合产生的135.6 nm辉光辐射、白天光电子激发产生的OI 135.6 nm和N2LBH波段的辉光辐射,可以得到夜间电离层峰值电子密度、电子总含量以及白天大气氧原子和氮分子的柱密度比O/N2等参数.本文基于IPM夜侧数据研究了在非极光区的中低纬度上,135.6 nm波段辐射强度在磁暴时与磁平静时的相对变化.研究表明,135.6 nm波段辐射强度极易受到磁暴影响发生扰动,对Dst指数响应十分敏感,即使是较弱的磁暴,135.6 nm波段辐射强度也会出现增强,辐射增强出现的时间与磁暴的主相与恢复相有很好的对应性;通过与IGS(International GNSS Service)提供的TEC比对研究表明,磁暴期间135.6 nm辐射增强并非仅由与电离层电子密度信息正相关的O+和电子辐射复合机制产生的辐射贡献引起;多个不同强度的磁暴事件研究表明,135.6 nm辐射强度在磁暴时相对平静时的增加量与Dst指数呈反比,即Dst指数越低,135.6 nm辐射强度的增加量越大,且纬度越高,135.6 nm辐射强度的增加量越大.The Ionosphere PhotoMeter(IPM)is a far ultraviolet nadir-view photometer that flew aboard the second-generation,polar-orbiting Chinese meteorological satellite Feng-Yun 3D(FY-3D),which was launched on November 2th,2017.By observing far ultraviolet night-time OI 135.6 nm emissions,which are produced by the recombination of O+ions and electrons,The F2 layer peak electron density can be deduced.During daytime IPM was designed to measure the OI 135.6 nm and N2 Lyman-Birge-Hopfield(LBH)band emissions,which would be used to infer the O/N2 ration.Based on the night side dada of IPM,this paper studies the relative changes of nighttime 135.6 nm airglow emission intensity both mid and low latitudes during magnetic storms and quiet periods.Studies have shown that the nighttime 135.6 nm airglow emission is highly susceptible to disturbances due to magnetic storms.Even for very weak magnetic storms,the nighttime 135.6 nm airglow emission intensity will increase,and the time when the intensity increases corresponds well to the main phase and recovery phase of the magnetic storm.Through comparison with the TEC data provided by IGS(International GNSS Service),it is believed that the enhancement of 135.6 nm emission intensity during the magnetic storm is not caused by changes in the ionosphere.Studies of multiple magnetic storms with different intensities have shown that the increase in 135.6 nm intensity is inversely proportional to the Dst index,which means that the lower the Dst index,the greater the increase in 135.6 nm intensity during magnetic storms compared to magnetic calm,and the higher the latitude,the greater the increase in 135.6 nm emission intensity.

关 键 词：DST指数 135.6 nm气辉辐射强度 峰值电子密度 电子总含量 

分 类 号：P351[天文地球—空间物理学]