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利用AUREOL-3卫星对空间ULF/ELF电场、磁场分量以及电子密度同步测量数据,通过对数据的高分辨率谱分析,首次得到电离层Alfvén谐振器的谐振谱结构的空间直接测量结果.本文结果表明:对于近似垂直与地磁场方向的电场扰动分量,其一阶本征谐振频率为 7.8 Hz,二阶谐振频率为 14 Hz,且存在 SRS谱谐振结构.但对于磁场分量,仅在南北分量和垂直分量上发生谐振,而对水平东西方向的分量,在同一测量时间段内没有发生Alfvén谐振现象.
Using the AUREOL-3 satellite to measure the space ULF / ELF electric field, magnetic field component and electron density simultaneously, the spatial direct measurement results of the resonant spectral structure of the ionospheric Alfvén resonator are obtained for the first time by high-resolution spectral analysis of the data. The results show that the first-order intrinsic resonant frequency is 7.8 Hz and the second-order resonant frequency is 14 Hz, and the SRS spectral resonances exist for the components of electric field perturbation in the direction perpendicular to the geomagnetic field. However, for the magnetic field component, resonance occurs only on the north-south component and the vertical component, while for the horizontal east-west component, Alfvén resonance does not occur in the same measurement time.