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以卫星观测资料为基础,应用动力论方程,采用理论模型和数值分析方法,研究了不同地磁活动条件下同步高度区O+离子的分布,提出了O+离子密度和通量密度在同步高度区沿经度变化的半经验模型.主要结果为:在同步高度区（1）向阳侧O+离子密度和通量密度较大,背阳侧较小.（2）地磁活动指数Kp越小,O+离子密度和通量密度水平及其沿经度的变化越小,Kp越大时水平及其变化越大;Kp≥6时O+离子密度和通量密度较 Kp=0时大一个量级.（3）当 Kp=0或 Kp≥6时,O+离子密度在经度120°附近和240°附近最大,在磁尾最小;当地磁活动指数Kp=3～5时,O+离子密度在经度 0°处最大,在磁尾最小;无论Kp如何,O+离子通量密度部在经度120°附近和240°附近最大,在磁尾最小.
Based on the satellite observation data, the dynamic theory equations are used to study the distribution of O + ions in the synchronous altitude zone under different geomagnetic activities using theoretical models and numerical analysis methods. It is proposed that the O + ion density and flux density increase along the longitude (2) The smaller the geomagnetic activity index Kp, the smaller the O + ion density and the larger the O + ion density and flux density The change of the level of density and its longitude is smaller when the Kp is bigger, and the level of Kp is larger when the Kp is bigger than that of Kp = 0 when Kp≥6. (3) When Kp = 0 or Kp≥6, the density of O + ions is the largest near the longitude 120 ° and near 240 °, and the lowest at the magnetic tail. When the magnetic activity index Kp = 3-5, the density of O + ions is the largest at longitude 0 °, Minimum; regardless of Kp, O + ion flux density in the vicinity of longitude 120 ° and 240 ° near the maximum, the smallest tail in the magnet.