利用LBH辐射图像数据反演大气O/N2方法

利用极光Lyman-Birge-Hopfield (LBH) 辐射图像数据可用来研究太阳风磁场与地球磁场耦合、亚暴与磁暴等过程，综合LBH辐射图像数据和O原子135.6nm辐射数据可反演电离层氧原子与氮气分子O/N2比值分布，进而研究高层大气组分信息及电离层分布变化，对科学研究和空间天气预报具有重要意义. 本文给出了LBH辐射传输机理和我国自主研制的搭载在风云三号D星（FY-3D）上的广角极光成像仪（Wide-field Auroral Imager, WAI）在轨获得的LBH 140-180nm波段极光辐射图像数据. 结合大气紫外辐射积分代码（Atmospheric Ultraviolet Radiance Integrated Code, AURIC）计算O135.6nm辐射数据、LBH辐射光谱以及MSISE00大气模型计算的O、N2数据，给出了利用WAI观测的LBH辐射图像数据反演大气O/N2比值理论计算方法，该方法将为利用我国自主观测LBH辐射数据和O135.6nm辐射数据开展空间信息反演研究打下基础.

Calculation of the atmospheric O/N2 based on the LBH radiation image data

The auroral LBH radiation image data can be used to study the coupling process of solar wind magnetic field and earth magnetic field, substorm and magnetic storm. The ionospheric O/N2 ratio distribution can be retrieved using LBH radiation image data and O135.6nm radiation data, and then the upper atmosphere composition information and ionospheric distribution can be studied, which is of great significance for scientific research and space weather forecast. In this paper, the mechanism of LBH radiation transmission and the data of LBH 140-180nm auroral radiation image obtained by Chinese self-developed wide-field auroral imager (WAI) mounted on FY-3D are presented. Combined with the O135.6nm radiation data calculated by AURIC, LBHS radiation spectrum and O, N2 data calculated by MSISE00 atmospheric model, the theoretical calculation method of atmospheric O/N2 ratio inversion using LBH radiation image data observed by WAI is given. This method will lay a foundation for spatial information inversion research using LBH radiation data and O135.6nm radiation data observed by Chinese instruments.