A new inversion method for reconstruction of plasmaspheric He^(+)density from EUV images

作者：Ya Huang,Lei Dai,Chi Wang,RongLan Xu,Liang Li

摘要：The Computer Tomography(CT)method is used for remote sensing the Earth’s plasmasphere.One challenge for image reconstruction is insufficient projection data,mainly caused by limited projection angles.In this study,we apply the Algebraic Reconstruction Technique(ART)and the minimization of the image Total Variation(TV)method,with a combination of priori knowledge of north–south symmetry,to reconstruct plasmaspheric He+density from simulated EUV images.The results demonstrate that incorporating priori assumption can be particularly useful when the projection data is insufficient.This method has good performance even with a projection angle of less than 150 degrees.The method of our study is expected to have applications in the Soft X-ray Imager(SXI)reconstruction for the Solar wind–Magnetosphere–Ionosphere Link Explorer(SMILE)mission.

发文机构：State Key Laboratory of Space Weather Department of Engineering Physics

关键词：EarthplasmasphereHe+densityalgebraicreconstructiontechniqueimagetotalvariationnorth–southsymmetrySXIimagereconstructionSMILEmission

分类号： TP3[自动化与计算机技术—计算机科学与技术]