LMCCD相机影像摄影测量首次实践

摘要

LMCCD相机作为天绘一号卫星的有效载荷,是保证其实现无地面控制点摄影测量精度的关键。本文分别利用LMCCD影像和三线阵CCD影像对天绘一号卫星的相机参数进行在轨标定计算,并利用各组在轨标定结果对定位精度(重点对高程误差)进行统计分析。试验结果表明：与单纯的三线阵CCD影像相比,LMCCD影像在相机参数在轨标定中能有效抵御因卫星姿态变化率导致的光束法平差航线系统变形问题,在天绘一号现有姿态变化率的水平条件下,利用LMCCD影像进行相机参数在轨标定可保证天绘一号01星实现无地面控制点摄影测量精度要求。%The LMCCD camera is one of the payload in TH-1 satellite,which is the key step to ensure photogrammetry accuracy without ground control point.The camera parameters of TH-1 is calibrated on-orbit using LMCCD imagery and three-line-array CCD imagery,and the position accuracy are statisticed using different on-orbit calibration results especially the elevation error. The experimental results shows:The adjustment strip system deformation caused by satellite attitude change rate can be resisted in camera on-orbit calibration using LMCCD imagery compared with the single three-line-array CCD imagery.Under condition of the satellite attitude change rate in TH-1,it can be ensure 01 star of TH-1 photogrammetry accuracy without ground control point with camera parameters on-orbit calibration using LMCCD imagery.