基于几何拓扑学的高精度遥感卫星对地覆盖法

发布时间：2018-10-26 18:36

【摘要】：在遥感卫星对地覆盖方法中应用网格点法时,当目标分析区域大且精度要求高时存在时空复杂度高和计算效率低的问题。为此,基于几何拓扑学提出一种新的遥感卫星对地覆盖方法。将卫星每次过境轨迹和目标分析区域都理解为几何图形,对其做交集运算求得覆盖区域,并对每次过境区域图形做并集运算求得总覆盖区域,再分析其他覆盖特性。在运算过程中仅使用图形边点集合进行运算,只要保证幅宽两点的计算准确即可确保算法精度。实验结果表明,与基于网格的对地覆盖法相比,该方法可有效降低算法复杂度,使计算效率得到6倍以上的提升。
[Abstract]:When the grid method is applied in the remote sensing satellite coverage method, when the target analysis area is large and the precision is high, the problems of high space-time complexity and low computational efficiency exist. Therefore, a new method of remote sensing satellite coverage based on geometry topology is proposed. Every transit trajectory and target analysis area of satellite is understood as geometric figure, covering area is obtained by intersection operation, and total coverage area is obtained by combining each transit region figure, and other coverage characteristics are analyzed. In the course of operation, only the set of edge points of the graph is used for the operation, and the accuracy of the algorithm can be ensured only by ensuring the accuracy of the calculation of the two points in the width. Experimental results show that compared with the grid-based ground coverage method, the proposed method can effectively reduce the complexity of the algorithm and improve the computational efficiency by more than six times.
【作者单位】：河南大学数据与知识工程研究所;中国科学院遥感与数字地球研究所;
【基金】：国家“973”计划项目“多尺度气溶胶综合观测水时空分布规律研究”(Y070072070) 国家自然科学基金(61272545) 民用航天2011年新开专业技术预先研究项目(D040201) 国防科技工业局高分重大专项“地球表层系统科学研究应用示范系统”(Y4D00100GF) 河南省科技攻关计划项目(142102210390)
【分类号】：P237;O189

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