摘要
简单回顾了“定向片法”和“EFP法”计算外方位元素的原理 ,指出仅仅利用三线阵CCD影像及地面控制点的空中三角测量 ,不能实现单航线角隅各一个控制点的平差计算模型与实地的相似性 (不计像点观测误差 )。利用EFP法空中三角测量的原理 ,进一步分析了其原因 ,提出了在相邻EFP像片之间增设连接点 ,同时要求在航线首末基线范围内的连接点带地面坐标或连接点在其左、右EFP像片上的坐标之一是其真中心投影坐标。在其控制下 ,平差结果实现了包括基线数B =2在内的单航线平差计算的模型基本与实地相似 ,并列出了在多种情况下利用计算机模拟数据进行平差精度统计的结果。最后就解决连接点真中心投影坐标获取问题 ,对三线阵CCD相机提出了附加要求 ,即在正视CCD线阵右侧附加两个 1 5 0 0像元× 1 5 0 0像元 (或更小 )
The fundamentals of exterior orientation elements calculation by orientation images method and EFP (equivalent frame photo) method are reviewed briefly. And so far, none of aerial triangulation with three-line array CCD image and ground control points can pass through the similarity (no count of image observational error) between real model and the model estimated by single strip adjustment computed with the help of four control points at the corners of the strip is indicated. Based on the aerial triangulation by EFP method, the reason of the presented problem is studied deeply. The addition of connected point(s) between neighbor EFP is proposed, and meanwhile, the ground coordinates of connected points located in the first and last baselengths of the strip are given or either of connected point coordinates in the left or right EFP is true. With the alternative control, the adjustment results can almost make the model calculated by single strip adjustment similar with real model. And several final statistical results of adjustment using computer simulated data are listed.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2003年第4期379-385,共7页
Geomatics and Information Science of Wuhan University
