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测绘学报  2013 

资源三号测绘卫星三线阵影像高精度几何检校

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Keywords: 资源三号测绘卫星,严密几何成像模型,几何检校,相机畸变,立体平差

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Abstract:

高精度几何检校是测绘卫星能否实现立体测图的关键。本文提出了用于星载光学卫星在轨几何检校的严密成像几何模型,推导了多线阵CCD拼接的内方位元素模型,在此基础上构建了基于偏置矩阵及内方位元素模型的多检校场联合几何检校模型和几何检校方案。针对我国第一颗民用测绘卫星资源三号,利用华北多个地区12000的正射影像和数字高程模型对资源三号三线阵影像进行几何检校,利用河北安平靶标区域三线阵数据进行验证。结果表明,采用本文的方案,资源三号测绘卫星无控制点平面定位精度优于20m,利用靶标控制点的平面定位精度优于0.6m,高程精度优于0.5m,达到资源三号测绘卫星所能达到的理论极限精度;并验证了资源三号三线阵相机并不存在镜头光学畸变,只是存在主距变化、CCD排列旋转等引起的线性误差。

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