【摘要】 由于航天遥感相机在敏捷成像过程中姿态和成像方位的变化,以及地球曲率的影响,会导致像面空间几何映射形状发生不同程度的形变。文章分析了遥感相机的敏捷成像模式及特点;根据时间延迟积分(TDICCD)遥感相机的成像特点,建立了基于共线方程的几何配准模型,通过追迹地面点精确地描述任意姿态下的空间成像几何数学关系;通过样例计算各种工况下的整个视场对应的像元地面分辨率,分析了在各种敏捷成像状态下的几何形变情况。以在轨实际图像进行数据比对,结果表明平均误差小于0.009m。该方法同样可应用于其它类型航天遥感相机在不同姿态下的几何形变分析。更多还原

【Abstract】 The attitude variation and image orientation change of aerospace remote sensing camera in agile imaging mode and the curvature of the earth cause the mapping shape of space geometry on focal plane to be distorted in different degree. Firstly, the mode and characteristics of agile imaging are analysed. Then, according to the imaging characteristics of TDICCD remote sensing camera, a geometric registration model based on collinearity equation is established. The space imaging geometrical mathematics in any attitude is described accurately through tracking ground points. The ground resolution corresponding to pixels of the whole field of view is calculated in various kinds of working situations. The geometric distortion is analysed in differents status of agile imaging. Finally, the result shows everage error is less than 0.009 m in comparison with actual image. The method can also be applied to geometric distortion analysis for any other kinds of aerospace remote sensing camera in different attitudes.更多还原