静止轨道卫星姿态偏置对天线方向图影响的分析

静止轨道卫星姿态偏置对天线方向图影响的分析

内容简介：地球静止轨道（GEO）卫星通常具备滚动、俯仰姿态偏置能力,即卫星滚动或俯仰姿态控制目标角度不是0°,而是某一设定角度,以便卫星定点位置改变时也能确保天线方向图覆盖满足要求。文章对某GEO卫星姿态偏置后对天线方向图及卫星其它性能的影响进行了分析,给出了卫星姿态偏置情况下天线覆盖区域的计算方法,在计算时考虑了卫星轨道倾角的影响。分析结果表明：由于卫星天线方向图设计时均有一定的设计裕度,卫星定点位置发生变化时,通过进行姿态偏置,可使其天线方向图满足用户使用要求,卫星在轨测试及运行结果也验证了这一结论。

Abstract：Antenna pattern is an important target of the antenna＇s performance. The GEO satellite usually has capability of attitude offset. It means that target angle of roll attitude or pitch attitude of satellite may not be zero,but keeping a certain degree in order that the antenna pattern can meet the requirement during some condition changes. An analysis of effect of GEO satellite＇ s attitude offset on antenna pattern and satellite＇s performance is made in this paper. The calculating method of antenna pattern is given in the condition of attitude offset. The influence of orbital inclination is considered. The conclusion is that when the position of the satellite changes, antenna pattern can meet the requirement by using attitude offset. The in-orbit testing result of the satellite verifies this conclusion.

作者：袁莉芳, 杨慧, 罗耀辉, 定宇,

关键词：地球静止轨道卫星, 姿态偏置, 天线方向图, 性能, 轨道倾角,