一种遥感卫星连续过境区域快速判定方法

A Rapid Method for Determining Continuous Transit Area of Remote Sensing Satellite

精确判定遥感卫星相机指向点过境行政区划,在对地观测覆盖分析和任务规划中有重大意义。提出一种遥感卫星连续过境区域快速判定方法,借鉴LOD思想构建待分析区域金字塔模型,建立上下层和同层邻域索引;采用纵向搜索由模糊到精确,逐层向下缩小判定区域;考虑运动连续性和空间相关关系,结合横向邻域搜索与逆向父层搜索,快速锁定相邻点的过境顶层区域。开展资源三号02星县级行政区划过境分析实验。结果表明,相较于传统方法和单纵向搜索法,该方法在保证准确性的同时,能够大幅提高过境判定的时间效率,单次平均耗时稳定在5.4 ms左右,能够满足高动态遥感卫星的实时过境区域判定要求。

It is of great significance to accurately determine the administrative transit area of remote sensing satellite camera pointing in earth observation coverage analysis and mission planning. A rapid method for determining continuous transit area of remote sensing satellite was proposed. A pyramid model for the analyzed area was constructed using LOD and the index of the upper-lower and the index of adjacent areas of the same layer were built. Then,vertical search was used to reduce the area range gradually from vague to precise. Considering motion continuity and spatial correlation,horizontal neighborhood search and reverse parent-layer search were adopted to lock the top crossing area of adjacent points quickly. Analysis for county-level transit area of ZY-3 02 satellite was carried out.The results indicate that the proposed method can greatly improve the decision time efficiency on the basis of ensuring accuracy compared with the traditional and the pure vertical search method. The single-average time consumption is about 5.4 ms,which is enough to meet the need for the real-time transit area determination analysis of high dynamic remote sensing satellites.