电离层掩星反演的TEC修正反演法

TEC Compensated Inversion Method of Ionospheric Occultation

电离层掩星数据反演的传统方法是采用改正TEC的Abel变换反演法,实际电离层的非球对称性会给电子密度的反演结果带来误差.文中研究了利用TEC修正方法结合背景场来剔除TEC受电子密度水平变化的影响,改善球对称假设适用性,提高反演精度,并应用此方法于模拟掩星事件的反演.结果表明,与传统的Abel变换反演相比,TEC修正反演法能够减小反演误差.用TEC修正反演法对不同方法获取的背景场的反演结果比较表明,背景场与实际场吻合的程度越高,反演效果越好.

A calibrated TEC of Abel inversion method is usually applied in the inversion of ionospheric occultation data, which could cause error for the spherical asymmetry of the real ionosphere. This paper studies a method, TEC compensated inversion method. Combined with background field, this method removes the effect of TEC from the horizontal change of the electron density to improve the applicability of spherical symmetry and inversion accuracy. Then the method is applied in the inversion of simulated data. The result of simulated data inversion validates that TEC compensated inversion method decreases the inversion errors greatly, compared with Abel inversion method. Through the study on background fields obtained by different ways with TEC compensated method, the more close between background and real field, the better inversion result is obtained.