线阵CCD传感器成像误差模型分析

Analysis of linear CCD sensor calibration parameter model

在动态航天摄影测量条件下,受环境因素影响CCD传感器和相机镜头的各项参数均会发生变化,这对卫星图像定位精度将产生很大的影响。文章从CCD传感器的成像几何及物理意义出发,分析各种误差因素,建立传感器内方位误差模型,有效消除卫星平台和传感器系统的主要系统误差及部分偶然误差,为实现卫星影像的高精度定位提供保证。最后分析了内定标后的残差对定位精度的影响。

Under conditions of dynamic space photogrammetry, the CCD sensor and camera lens parameters will change,which will have a huge impact on the satellite image positioning accuracy. Based on the CCD sensor imaging Geometric characteristics and physical significance,this article analyses the factors which caused the deviation,constructs the appropriate inner orientation model.It can effectively eliminate both system error and random error caused by satellite platrorms and sensor systems,and therefore,provides great assurance to image positioning.The effect of Residuals on positioning accuracy is analysis at last.