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文章利用1989-2004年间“Los Alamos”7颗地球同步轨道卫星的数据对不同磁暴条件下处于地球同步轨道高度等离子体片区域的卫星表面充电电位和热电子(0.03～45keV)温度随地方时的分布及随磁暴发生时间的变化规律进行统计分析。根据对磁层顶电流修正后的Dst指数(Dst*)将磁暴分成弱磁暴、强磁暴以及超大磁暴。在随地方时的分布上,弱磁暴时卫星最可能在午夜后侧负向强充电(>800V);随着磁暴强度的增加,在超大磁暴情况下该区域会沿东西方向扩展到夜晚21时到凌晨4时的区域。在随磁暴发生时间的分布上,弱磁暴下卫星表面充电到高负电位主要发生在Dst*最低点前3h和后2h的时刻,强磁暴下主要发生在Dst*最低点时刻,而超大磁暴下主要发生在恢复相,持续时间达十几个小时。表面电位的分布规律和热电子温度的分布规律表现一致:卫星表面负电位超过100V的区域主要集中在热电子温度大于2keV的区域,而表面负电位最可能超过800V的区域主要集中在热电子温度大于2.5keV的区域。通过统计分析看出,对于那些极可能发生高负电位充电(>8kV)情况下的卫星表面电位分布与磁暴的强弱并无明显的相关性,但发现在弱磁暴情况下明显集中在正午前侧区域。
In this paper, we use the data of 7 geosynchronous orbital satellites in Los Alamos during 1989-2004 for satellite surface charge potentials and hot electron (0.03-45 keV) temperatures in the geosynchronous orbit-height plasma region under different magnetic storm conditions. When the distribution of the storm and the time of occurrence of changes in statistical analysis. Based on the Dst index (Dst *) after correction of magnetospheric top current, the magnetic storms are divided into weak magnetic storms, strong storms and large storms. With local distribution, the weak-earthburst satellite is most likely to be negatively charged (> 800V) late at midnight; as the intensity of the magnetic storm increases, the region will expand in the east-west direction at 21 o’clock in the event of a large magnetic storm To 4 am in the area. In the distribution of the time when the magnetic storm occurred, the surface charge of the satellite under the weak magnetic storm mainly occurred at the time of 3h and 2h after the Dst * lowest point. The strong magnetic storm mainly occurred at the moment of the lowest point of Dst * Mainly in the recovery phase, the duration of up to ten hours. The distribution of surface potential is consistent with that of hot electron temperature. The areas with negative surface potential over 100V are mainly concentrated in the areas where the temperature of hot electrons is more than 2keV, while the areas with negative surface potential most likely to exceed 800V are mainly concentrated in hot electron temperature Greater than 2.5keV area. Through statistical analysis, it is found that there is no obvious correlation between the surface potential distribution of satellite and the intensity of magnetic storms in those situations where high negative charge (> 8kV) is very likely. However, it is found that in the case of weak magnetic storms, Side area.