简单介绍了ADS40机载三线阵传感器的成像原理及其数据预处理技术,深入分析了ADS40影像定位的数学模型,提出一种快速确定成像扫描行的搜索算法,以此为基础设计出直接从ADS40 Level 0产品生成正射影像的快速校正流程。实验结果表明,本文的正射校正方法快速、有效,能满足预定比例尺正射影像的几何精度要求。

In this paper, the imaging principle, sensor model and the data pre-processing procedure of the ADS40 three-line sensor are briefly addressed firstly. Then a comprehensive study is concentrated on the mathematic sensor model of the ADS40 images, in which an efficient iterative searching algorithm was developed to determinate the corresponding scan line given an object point. After that the paper describes an efficient ortho images generation procedure that can be applied directly to the ADS40 Level 0 products. Test results show that the proposed ortho-rectification procedure works well and effectively and also, the accuracy fulfills the requirements of the ortho image generation with corresponding map scale.