GNSS/LEO无线电掩星电离层探测仿真研究

Simulation of GNSS/LEO Based Ionospheric Radio Occultation Monitoring

无线电掩星是实现全球电离层探测的重要手段之一。针对GNSS/LEO掩星探测电离层的特点,基于电离层掩星的判决条件,通过NeQuick模型实现了电波弯曲角和绝对总电子含量的数据仿真,利用阿贝尔变换法(Abel Transform)和穿刺法实现了电离层电子密度剖面的有效反演,统计分析结果验证了NeQuick模型用于GNSS/LEO无线电掩星电离层探测仿真的可行性。

Radio occultation is one of the most important ways in ionospheric monitoring.By analyzing the characteristic of GNSS/LEO-based radio occultation,NeQuick model was utilized for absolute total electron content（TEC）and bending angle calculation based on the judgments of ionospheric occultation,while Abel transform and piecing method are using for the inversion of the ionospheric electron density profiles.Simulation results validate the feasibility of the NeQuick model for simulating the ionospheric monitoring with GNSS/LEObased radio occultation.