摘要
高精度几何检校是测绘卫星实现立体测图的关键。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1∶2000的数字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20 m,利用靶标控制点的平面定位精度优于0.6 m,高程精度优于0.5 m,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。
High accuracy geometric calibration isa key technology of stereo mapping. The sensor model for calibrtion is proposed, as well as the interior orientation model is established considering the characteristic of multiple linearCCD sensors parallel imaging. On this basis, the geometric model of the method that combines several images of some test fields to perform the calibration is established using the offset matrix and the interior orienttion model. In the experiment, sevreal 1： 2000 DOM and DEM of different test fields of North China are taken as control data to calibrate theZY-3 three-line cameras. After applying the proposed method, the positioning accuracy without GCPs of ZY-3 three-line images is better than 20 while the plane positioning accuracy is better than O. 6 m and the height accuracy is better than 0.5m with GCPs. The interior calibration result demonstrates that the ZY-3 three-line cameras do not have lens distortion, but have some linear error caused by the variation of focal length and linear CCD chips arrangement.
出处
《测绘学报》
EI
CSCD
北大核心
2013年第4期523-529,553,共8页
Acta Geodaetica et Cartographica Sinica
基金
国家科技支撑计划(2011BAB01B01
2012BAH28B04)
