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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Nightside ULF Waves Observed in the Topside Ionosphere by the DEMETER Satellite
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Nightside ULF Waves Observed in the Topside Ionosphere by the DEMETER Satellite

机译:阴面ULF波观测到的上部得墨忒耳电离层的卫星

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We study ultralow-frequency (ULF) waves at frequencies 17–100 mHz observed in the topside ionosphere by the DEMETER satellite in an ~5-year period from January 2006 to November 2010. Our results show that two types of ULF oscillations occur on the nightside in the L 5%), are found to lag behind density variations, and the longitudinal distribution of type I ULF oscillations is quite similar to the longitudinal distribution of plasma irregularities at ~600 km. These signatures suggest that type I ULF oscillations are related to plasma irregularities that are common phenomena in the nightside F region ionosphere. The characteristics of type II ULF oscillations (without significant electron density perturbations) agree well with those features of midlatitude ionospheric electric field fluctuations, which are not thought to be related to magnetospheric origins.
机译:我们研究超低频(ULF)波17 - 100 mHz频率观测到的上部电离层的得墨忒耳卫星~ 5年从2006年1月到2010年11月。结果表明,两种类型的ULF振荡发生在阴面L 5%),发现落后密度变化,然后呢我提出的纵向分布类型纵向振动很相似分布的等离子体在~ 600公里的违规行为。这些特征表明,我ULF类型振荡等离子体相关违规行为在阴面是常见的现象地区电离层。ULF振荡(没有显著的电子密度扰动)也同意中间纬度电离层的电特性场的波动,并不被认为是与磁性层的起源有关。

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