Abstract

The character of the variability of the LT distributions of the equatorial plasma bubble occurrence probability with an increase of the recording altitude is under consideration. The conditions of the high and maximal solar activity, when the generation of the plasma bubbles is the most active, are examined. For this purpose the detailed comparative analysis of the LT distributions of the equatorial plasma bubble occurrence probability derived from the ISS-b (~972–1220 km), Hinotori (~650 km), ROCSAT-1 (~600 km), AE-E (~300–475 km), and CHAMP (~380–450 km) satellite data was done. The pronounced trend of the local time shift of the bubble occurrence probability maximum with an increase of the altitude is revealed. Thus, if the maximum occurs after sunset (~2030–2200 LT) at the bottom-side of the F-layer, it shifts toward the premidnight (~2100–2400 LT, ~600 km), then to the postmidnight (~0100–0300 LT, ~650 km), and, finally, to the predawn hours (~0300–0400 LT, ~972–1220 km) as the observation altitude increases. The most typical velocities of the equatorial plasma bubble rise are found to be ~150–300 m/s, which correspond to the numerous observational data.

中文翻译：

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赤道等离子气泡：发生概率与本地时间

摘要

赤道等离子体气泡出现概率的LT分布随记录高度的增加而变化的特性正在考虑中。当等离子气泡的产生最活跃时，检查高和最大太阳活动的条件。为此，对来自ISS-b（〜972-1220 km），Hinotori（〜650 km），ROCSAT-1（〜600 km），AE- E（〜300–475 km）和CHAMP（〜380–450 km）卫星数据已完成。随着高度的增加，气泡出现概率最大值的局部时移的显着趋势被揭示。因此，如果最大值出现在日落之后（〜2030–2200 LT），则在F的底部层，它移向午夜（〜2100–2400 LT，〜600 km），然后移至午夜（〜0100–0300 LT，〜650 km），最后移至黎明前的时间（〜0300–0400 LT） ，〜972–1220 km）随着观测高度的增加。赤道等离子气泡上升的最典型速度为〜150–300 m / s，与大量观测数据相对应。