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清华大学学报(自然科学版)  2022, Vol. 62 Issue (3): 573-580    DOI: 10.16511/j.cnki.qhdxxb.2021.26.020
  专题:吸气式发动机及空天动力技术 本期目录 | 过刊浏览 | 高级检索 |
遥感卫星对区域目标可见窗口的半解析快速算法
张众1, 鄂智博1, 黄丽霞2, 李俊峰1
1. 清华大学 航天航空学院, 北京 100084;
2. 中国航天科技集团 第五研究院, 北京 100084
Semi-analytical algorithm for computing satellite-area target visibility
ZHANG Zhong1, E Zhibo1, HUANG Lixia2, LI Junfeng1
1. School of Aerospace Engineering, Tsinghua University, Beijing 100084, China;
2. China Aerospace Science and Technology Corporation, Beijing 100084, China
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摘要 遥感卫星对区域目标的可见窗口计算是卫星观测任务的重要基础,高精度、高效率的求解算法对卫星观测任务规划具有重要意义。该文提出了一种针对区域目标快速计算可见窗口的半解析方法。该方法利用空间几何关系,将所有卫星视场投影与区域目标的边界描述为大圆弧或普通圆弧,得到区域边界相交判定方法;针对圆锥和矩形视场,得出解析判断可见性的条件;利用该解析判断条件,可快速判断卫星在每个离散时间步长下对区域目标的可见性;最后利用二分搜索快速计算精确的区域目标可见窗口。数值算例表明:该算法具有高精度与高效率,相较于商用软件STK,可见窗口持续时间相对误差在0.1%量级;在计算速度上,较传统传播算法提升105倍,较现有快速算法平均速度提升近1 000倍。
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张众
鄂智博
黄丽霞
李俊峰
关键词 遥感卫星可见性区域目标圆锥视场矩形视场    
Abstract:Computing the visibility of remote sensing satellites on an area target is an important basic satellite observation mission. The calculational accuracy and efficiency are then very important for satellite imaging scheduling. This paper presents a fast, semi-analytical algorithm for predicting satellite-area target visibility. First, geometric relations are used to define the boundaries of all the area targets described by ordinary arcs with the algorithm then determining the intersections. Then, the cone characteristics and the rectangular field of view of the satellite are used with a fast judgement condition for the visibility. The visibility at each discrete time step is determined analytically with a binary search which is then used to quickly predict the time for the visible window. Numerical examples show that this method is accurate and efficient. The relative error in the visibility duration is 0.1% relative to the predictions of the commercial software STK while the calculational speed is 105 times faster than the brute force method and almost 1 000 times faster than the average speed of the existing fast calculation algorithms.
Key wordsremote sensing satellites    visibility    area target    cone field    rectangular field
收稿日期: 2021-01-04      出版日期: 2022-03-10
基金资助:李俊峰,教授,E-mail:lijunf@tsinghua.edu.cn
引用本文:   
张众, 鄂智博, 黄丽霞, 李俊峰. 遥感卫星对区域目标可见窗口的半解析快速算法[J]. 清华大学学报(自然科学版), 2022, 62(3): 573-580.
ZHANG Zhong, E Zhibo, HUANG Lixia, LI Junfeng. Semi-analytical algorithm for computing satellite-area target visibility. Journal of Tsinghua University(Science and Technology), 2022, 62(3): 573-580.
链接本文:  
http://jst.tsinghuajournals.com/CN/10.16511/j.cnki.qhdxxb.2021.26.020  或          http://jst.tsinghuajournals.com/CN/Y2022/V62/I3/573
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
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[1] 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.
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