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Generation of Realizations of Electron Density for Numerical Electromagnetic Propagation Simulations
Radio Science ( IF 1.6 ) Pub Date : 2021-04-09 , DOI: 10.1029/2020rs007145
Dennis L. Knepp 1 , Vladimir I. Sotnikov 2
Affiliation  

In this study, we use a collection of Gaussian striations to generate random realizations of a disturbed ionosphere. The formalism is developed here to create a two‐dimensional realization of electron density by summing a large number of Gaussian striations, uniformly distributed in space and with a given probability density function of their radii. We analytically calculate the power spectral density (PSD) of the electron‐density fluctuations generated and show that it matches the form often observed in the natural ionosphere of a single‐component power‐law between inner and outer scale. A second probability density function of striation radii is studied that leads to a power‐law form for the autocorrelation function of in‐situ irregularities. An example of electromagnetic propagation using a multiple phase screen simulation with phase screens produced from Gaussian striations is compared to a similar example using statistical phase screens chosen to model the same situation.

中文翻译:

用于数字电磁传播模拟的电子密度实现的生成

在这项研究中,我们使用高斯条纹的集合来生成受扰电离层的随机实现。通过将大量高斯条纹相加,在空间中均匀分布并具有其半径的给定概率密度函数,将形式主义发展成为电子密度的二维实现。我们通过分析计算产生的电子密度波动的功率谱密度(PSD),并表明它与内部和外部尺度之间单分量幂律的自然电离层中经常观察到的形式相匹配。研究了条纹半径的第二个概率密度函数,该函数导致原位不规则性的自相关函数的幂律形式。
更新日期:2021-04-29
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