【摘要】 地形因素,包括地面起伏和地球曲率,是造成航空数字遥感影像变形的主要原因之一。本文以中国科学院遥感所自行研发的多模态航空CCD相机系统为对象,结合其成像模式和几何形态,分析了地形因素给影像带来的变形,推导出航空面阵CCD影像变形的一般公式,并通过概算进行了定量评价,得出了对于航空面阵CCD影像,要想得到高精度的几何处理,必须改正地球曲率影响的结论。更多还原

【Abstract】 Topographic factors such as hypsography and earth curvature are greatly responsible for remote sensing image distortion.Nevertheless,the earth curvature is often neglected by traditional aerial photogrammetry in processing the films.With the Multi-mode Aerial Digital Camera system(MADC) developed and produced by IRSA as the object,this paper analyzed the topographic influences on aerial array CCD imaging.On the basis of the imaging model and geometric configuration of MADC,the distortion models of hypsography and earth curvature were derived respectively for estimating topographic influences by simulating data.It is concluded that the earth curvature distortion must be rectified in precise processing of aerial array CCD images.更多还原