Abstract—

The equatorial plasma “bubbles” that form at the bottom-side of the F-layer are affected by zonal plasma drift when they rise to greater altitudes. Under the influence of the drift, the bubbles move eastward. Conversely, a plasma bubble that is “stretched” along a magnetic flux tube repeats its spatial course. For example, a change in the magnetic declination of a flux tube will result in a change in the longitudinal orientation of the bubble. Bubbles undergo an eastward shift in regions with an eastern magnetic declination and a westward shift in regions with a western magnetic declination. The character of the influence of these factors has been studied on the examples of the longitudinal distributions of the equatorial plasma bubbles calculated for the winter and spring periods. For this purpose, the data from the ISS-b, AE-E, OGO-6, ROCSAT-1, and Hinotori satellites obtained in the years of high solar activity at the different orbital altitudes were used. It was found that the bubbles detected at the altitudes of ~972–1220 km in the 0°–50° DIPLAT band follow the course of the magnetic declination of the flux tube, experiencing almost no influence of the zonal plasma drift. The bubbles detected at the altitudes of ~300–700 km within ±20° DIPLAT were found to be strongly influenced by the eastward zonal drift. The magnetic declination only controls the magnitude of their shift in the east direction.

中文翻译：

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赤道等离子气泡：纵向分布随高度的变化

摘要—

在F底部形成的赤道等离子体“气泡”层上升到更高的高度时，会受到纬向等离子体漂移的影响。在漂移的影响下，气泡向东移动。相反，沿着磁通量管“拉伸”的等离子气泡会重复其空间过程。例如，通量管的磁偏角的改变将导致气泡的纵向方向的改变。气泡在具有东方磁偏角的区域中向东移动，并且在具有西方磁偏角的区域中向西移动。在针对冬季和春季计算的赤道等离子气泡的纵向分布示例中，已经研究了这些因素的影响特征。为此，来自ISS-b，AE-E，OGO-6，ROCSAT-1，使用了在不同轨道高度太阳活动多年以来获得的Hinotori卫星。发现在0°–50°DIPLAT波段〜972–1220 km的高度处检测到的气泡遵循通量管的磁偏角变化过程，几乎不受区域等离子体漂移的影响。发现在±20°DIPLAT范围内〜300–700 km的海拔高度上检测到的气泡受到向东纬向漂移的强烈影响。磁偏角仅控制它们向东移动的幅度。发现在±20°DIPLAT范围内〜300–700 km的海拔高度上检测到的气泡受到向东纬向漂移的强烈影响。磁偏角仅控制它们向东移动的幅度。发现在±20°DIPLAT范围内〜300–700 km的高空探测到的气泡受到东向纬向漂移的强烈影响。磁偏角仅控制它们向东移动的幅度。