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清华大学学报(自然科学版)  2019, Vol. 59 Issue (9): 699-704    DOI: 10.16511/j.cnki.qhdxxb.2019.26.020
  航空航天与工程力学 本期目录 | 过刊浏览 | 高级检索 |
遥感卫星对区域目标可见性的快速计算方法
鄂智博, 李俊峰
清华大学 航天航空学院, 北京 100084
Fast simulation algorithm for area target visibility using remote sensing satellites
E Zhibo, LI Junfeng
School of Aerospace Engineering, Tsinghua University, Beijing 100084
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摘要 遥感卫星对区域目标可见时间窗口的快速计算,对卫星观测规划任务具有重要意义。该文提出了一种快速算法,首先根据卫星视场类型以及与地面点的几何关系,给出判断卫星对地面点可见性的方法;然后通过离散时间步长结合二分搜索的方法,精确计算卫星对单个离散点的可见时间窗口;最后根据所有离散边界点的可见窗口最终得到对区域目标的可见时间窗口。仿真结果表明:该算法具有很高的效率和精度,与STK(satellite tool kit)计算得到的结果偏差在0.01 s量级。
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鄂智博
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关键词 遥感卫星区域目标可见性快速计算方法    
Abstract:Fast calculations of area target visibility are important for satellite mission scheduling. This paper presents a fast simulation algorithm to compute the visibility of area targets by remote sensing satellites. A method was developed to judge the visibility of a ground point from a satellite based on the satellite's view field and the geometric relation between the satellite and the ground point. Then, the in-view period of a single point was obtained using large time step discretization and a binary search. The in-view period of all the discrete boundary points was then used to determine the visible time window for an area target. Numerical results show that the algorithm is efficient and accurate with the error between the algorithm and satellite tool kit (STK) predictions of aboutt 0.01 s.
Key wordsremote sensing satellites    area target    visibility    fast simulation algorithm
收稿日期: 2019-02-03      出版日期: 2019-08-27
基金资助:自然科学基金面上项目(11672146)
通讯作者: 李俊峰,教授,E-mail:lijunf@tsinghua.edu.cn     E-mail: lijunf@tsinghua.edu.cn
引用本文:   
鄂智博, 李俊峰. 遥感卫星对区域目标可见性的快速计算方法[J]. 清华大学学报(自然科学版), 2019, 59(9): 699-704.
E Zhibo, LI Junfeng. Fast simulation algorithm for area target visibility using remote sensing satellites. Journal of Tsinghua University(Science and Technology), 2019, 59(9): 699-704.
链接本文:  
http://jst.tsinghuajournals.com/CN/10.16511/j.cnki.qhdxxb.2019.26.020  或          http://jst.tsinghuajournals.com/CN/Y2019/V59/I9/699
  图1 卫星的可视范围
  图2 卫星与地球位置
  图3 卫星与地面点相对位置关系
  图4 圆锥视场
  图5 矩形视场
  表1 卫星轨道参数
  表2 区域目标顶点经纬度
  表3 可见性计算所需 CPU时间
  表4 可见时间窗口信息
  图6 计算结果与STK 结果偏差
  图7 矩形视场与区域目标位置关系
  图8 修正计算结果与STK 结果偏差
  图9 计算结果与STK 结果相对误差
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