Estimation of the Ionosphere Critical Frequency Without Radio Sounding
Estimation of the Ionosphere Critical Frequency Without Radio Sounding
复制标题
无需无线电探测的电离层临界频率估计
DOI：
10.1109/tgrs.2020.2972011
复制
发表时间：
2020
影响因子：
8.2
通讯作者：
T. Polyushkina
中科院分区：
文献类型：
--
作者：
A. Potapov;T. Polyushkina
电离层Alfvén谐振器(IAR)发射的频率参数与电离层F2层的临界频率fF2密切相关。然而，这种联系的数量特征是不稳定的，每天可能会有很大的差异。为了克服这种不稳定性，我们建议使用多元回归分析，并使用反映电离层状态的额外因素作为预测因子。在训练样本的基础上，我们使用各种回归变量组合来计算一组回归方程，并从最小化估计标准误差的角度选择最有效的回归方程。利用控制数据样本检验了所得到的临界频率估计方程的有效性。结果表明，该方法可以估计出约0.5 MHz的临界频率。建议在发展同化电离层模型时使用IAR频率结构的信息。
The frequency parameters of the ionospheric Alfvén resonator (IAR) emission show a close connection with the critical frequency foF2 of the ionospheric F2 layer. However, the quantitative characteristics of the connection are unstable and can vary significantly from day to day. To overcome this instability, we propose to use a multiple regression analysis with additional factors that reflect the state of the ionosphere as predictors. On the basis of the training sample, we compute a set of regression equations using various combinations of regressors, of which we choose the most effective from the point of view of minimizing the estimate standard error. The efficiency of the obtained equations for the critical frequency estimation is checked using the control data sample. The results suggest that the proposed method makes it possible to estimate the value of the critical frequency with an accuracy of about 0.5 MHz. A proposal is made to use the information on the IAR frequency structure in the development of assimilation ionospheric models.