星载焦面视场拼接TDI CCD 相机成像质量及处理方法分析
摘要
This paper analyzes influences on ground imaging by a TDI CCD camera with a linear focal plane array. Various factors are taken into account: satellite yaw angle, camera integration time, stability of the platform, attitude and orbital errors, linear array precision, direction of change of dislocation (variation of point) and image distortion in the direction of the ground scan (variation of line). Using HR camera images recorded by the CBERS-02B satellite, we discuss a method for processing data su?ering from image dislocation due to yaw angle: image registration affine transformation based on a ground image. Employing ground registration tests of the CBERS-02B HR linear array, we analyze the satellites compensation accuracy and error of yaw angle, and the causes of image distortion.