Wide-field auroral imager onboard the Fengyun satellite  

作　　者：Xiao-Xin Zhang Bo Chen Fei He Ke-Fei Song Ling-Ping He Shi-Jie Liu Quan-Feng Guo Jia-Wei Li Xiao-Dong Wang Hong-Ji Zhang Hai-Feng Wang Zhen-Wei Han Liang Sun Pei-Jie Zhang Shuang Dai Guang-Xing Ding Li-Heng Chen Zhong-Su Wang Guang-Wei Shi Xin Zhang Chao Yu Zhong-Dong Yang Peng Zhang Jin-Song Wang 

机构地区：[1]National Satellite Meteorological Center,China Meteorological Administration,Beijing,China [2]Key Laboratory of Space Weather,National Center for Space Weather,China Meteorological Administration,Beijing,China [3]Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun,China [4]State Key Laboratory of Applied Optics,Chinese Academy of Sciences,Changchun,China [5]Key Laboratory of Earth and Planetary Physics,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing,China [6]Institutions of Earth Science,Chinese Academy of Sciences,Beijing,China

出　　处：《Light(Science & Applications)》2019年第1期776-787,共12页光（科学与应用)（英文版）

基　　金：supported in part by the National Science Foundation of China(Grant Nos.41774152 and 41674155);supported by the Strategic Priority Research Program of Chinese Academy of Sciences(Grant No.XDA17010201);the Youth Innovation Promotion Association of the Chinese Academy of Sciences(2017258).

摘　　要：The newly launched Fengyun-3D(FY-3D)satellite carried a wide-field auroral imager(WAI)that was developed by Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences(CIOMP),which will provide a large field of view(FOV),high spatial resolution,and broadband ultraviolet images of the aurora and the ionosphere by imaging the N2 LBH bands of emissions.The WAI consists of two identical cameras,each with an FOV of 68°in the along-track direction and 10°in the cross-track direction.The two cameras are tilted relative to each other to cover a fan-shaped field of size 130°×10°.Each camera consists of an unobstructed four-mirror anastigmatic optical system,a BaF2 filter,and a photon-counting imaging detector.The spatial resolution of WAI is ~10 km at the nadir point at a reference height of 110 km above the Earth’s surface.The sensitivity is>0.01 counts s^(−1) Rayleigh^(−1) pixel^(−1)(140-180 nm)for both cameras,which is sufficient for mapping the boundaries and the fine structures of the auroral oval during storms/substorms.Based on the tests and calibrations that were conducted prior to launch,the data processing algorithm includes photon signal decoding,geometric distortion correction,photometric correction,flatfield correction,line-of-sight projection and correction,and normalization between the two cameras.Preliminarily processed images are compared with DMSP SSUSI images.The agreement between the images that were captured by two instruments demonstrates that the WAI and the data processing algorithm operate normally and can provide high-quality scientific data for future studies on auroral dynamics.

关 键 词：STORM CORRECTION FIELD 

分 类 号：P94[天文地球—自然地理学]