利用含纯增长模式线的异常非相干散射谱反演扰动电子温度

基于平衡态非相干散射理论的GUISDAP程序包在拟合含有纯增长模式线的非相干散射功率谱及反演加热扰动电离层参量中存在严重误差，该文提出一种以未加热时刻的电离层参量为先验信息，利用最小二乘法搜寻最佳高斯峰描述纯增长模式线来修正实测非相干散射谱，并使用电子超高斯分布的非相干散射理论拟合修正后非相干散射谱来反演获取加热扰动电子温度的方法。通过将该方法用于分析2010年秋季我国在挪威开展的电离层加热实验数据表明:利用该方法对含纯增长模式线的实测谱修正拟合后获得的电子温度比未加热时刻提高约800 K左右，增幅比例约13%~50%，该结果与现有文献报道的电离层加热引起的电子温度增幅范围吻合较好。结论表明该方法适用于基于含纯增长模式线的非相干散射谱反演扰动电离层参量。

Inversion of Disturbed Electron Temperature by Anomalous Incoherent Scatter Spectra with Pure-growth Mode Line

In the fitting process of the incoherent scatter power spectra with pure-growth mode line and the inversion of the disturbed ionospheric parameters, the GUISDAP package which is based on the equilibrium incoherent scatter theory, always exits serious error. Assuming the ionospheric parameters at heating-off time as a priori information, by using the least squares method to search the best Gaussian peak for the modification of the measured incoherent scatter spectra, one method is provided to obtain the disturbed electron temperature through fitting the modified measured spectra by taking advantage of the incoherent scatter theory of electron super-Gaussian distribution. This method is used to the ionospheric heating experimental data which is conducted in Norway in the autumn of 2010, and the results indicate that the electron temperature obtained by fitting the modified spectra is about 800 K higher than that of the heating off time, and the increase ratio is about 13%~50%, which is well coincided with the electron temperature increase range of ionospheric heating reported in the existing literature. The conclusion shows that the method is applicable to the inversion of disturbed ionospheric parameters by using of the incoherent scatter spectra with pure-growth mode line.