Abstract
通过对LEO-LEO掩星事件仿真，分析卫星轨道参数对掩星事件持续时间和卫星间相对角速度的影响.结果表明：对掩星事件持续时间影响较大的LEO-LEO卫星轨道参数依次为轨道倾角、升交点赤经、轨道高度，近地点角距对掩星事件持续时间影响不大；LEO-LEO卫星轨道倾角互补时，掩星事件持续时间最短，为98s；两颗LEO卫星轨道倾角之和或者升交点赤经之差在120°-240°范围内，掩星持续时间约100~150s；两颗LEO卫星轨道越高，掩星持续时间越短；掩星发生时，LEO卫星间水平方向相对角速度最大值约为0.14（°）·<sup>-1</sup>，俯仰方向相对角速度最大值约为0.078（°）·s<sup>-1</sup>.
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