Abstract. The stratification phenomenon is investigated using the simultaneous in situ plasma density measurements obtained by the Swarm satellites orbiting at different altitudes above the F2 peak. For the first time, the continuous distribution morphology and the exact locations are obtained for the nighttime stratification, which show that the stratification events are centered at the EIA (equatorial ionization anomaly) trough and extend towards the two EIA crests, with the most significant part being located at the EIA trough. Another new discovery is the stratification in southern mid-latitudes; stratification events in this region are located on a local plasma peak sandwiched by two lower density strips covering all the longitudes. The formation mechanism of the stratification for the two latitudinal regions is discussed, but the stratification mechanism in southern mid-latitudes remains an unsolved problem. Highlights. This paper addresses the following: first application of in situ plasma densities for the direct analysis of the stratification in F2 layer, refined features of the exact location and continuous morphology for the stratification phenomenon, a new discovery of stratification covering all longitudes in southern mid-latitudes.

中文翻译：

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Swarm 卫星原位等离子体密度测量观测到的分层

摘要。使用由在 F2 峰值以上不同高度运行的 Swarm 卫星获得的同步原位等离子体密度测量来研究分层现象。首次获得了夜间分层的连续分布形态和准确位置，表明分层事件以EIA（赤道电离异常）槽为中心，向两个EIA波峰延伸，其中最显着的部分位于 EIA 低谷。另一个新发现是南部中纬度地区的分层；该地区的分层事件位于一个局部等离子体峰上，中间夹着两条覆盖所有经度的低密度条带。讨论了两个纬度区域分层的形成机制，但南部中纬度地区的分层机制仍然是一个未解决的问题。强调。本文主要阐述了以下内容：首次应用原位等离子体密度直接分析F2层的分层，精细化分层现象的准确位置和连续形态特征，新发现覆盖中南部所有经度的分层。纬度。