磁顶附近UHF无线电信号电离层振荡的频谱特征
Spectral characteristics of ionospheric scintillations of UHF radiosignal near magnetic zenith
摘要：
本文介绍了伊尔库茨克非相干散射雷达（IISR）在地磁静止和扰动条件下对天鹅座-A辐射源在地球电离层闪烁的观测结果。IISR用于电离层测试的闪烁法确定了菲涅耳频率和功率截止-频谱特征通常与电离层等离子体不规则性的速度和空间频谱有关。我们还使用IGFR磁场模型来描述离散射电源闪烁谱的形状与射电源方向相对于地磁场的关系。观测到的磁天顶S_4指数的增加是由闪烁谱展宽所决定的。我们还评估纬向速度观测到的电离层的不规则性为~10米/秒，假设不规则性出现在高度的F2层最大的电离层。
英文摘要：
We present results of observation of Cygnus-A radiosource scintillation in the Earth's ionosphere in quiet and disturbed geomagnetic condition at Irkutsk incoherent scattering radar (IISR). Scintillation method applied for ionosphere testing at IISR confidently defines Fresnel frequency and power cutoff - the spectral characteristics usually related to the velocities and spatial spectra of ionospheric plasma irregularities. We also use IGFR magnetic field model in order to show relation between shape of discrete radio source scintillation spectra and direction to the radio source with respect to geomagnetic field. Observed increasing of S4 index in magnetic zenith is conditioned by the scintillation spectrum widening. We also evaluate zonal velocity of observed ionospheric irregularities as ~10 m/sec assuming irregularities to appear at the height of F2 layer maximum of the ionosphere.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
