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- 2018
利用北斗系统构建LEO-R海洋遥感星座的理论研究
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Abstract:
北斗是中国独立研发的导航系统，其反射事件的数量和分布规律有特殊的优势，也是设计低轨道反射信号（low earth orbit-reflection，LEO-R）星座的重要指标。利用具有均匀性和稳定性优势的Walker架构，设计了LEO-R星座，实现基于北斗反射信号的全球海洋遥感探测。分析星座与北斗的几何关系，推导了北斗反射事件被覆盖的判断条件。提出了标记-遍历的镜点计算方法，定量分析星座参数对北斗反射事件数量和分布规律的影响，并模拟36 h的尼伯特台风场景作为探测对象。结果表明，星座的覆盖时间百分比为97.619 73%，最大重访时间为404.511 s，验证了该星座全球遥感探测的有效性
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