论文部分内容阅读
通过分析卫星轨道末期星载TDI CCD相机成像面临的数据读出频率过大、像移失配严重等瓶颈问题,提出了轨道末期卫星侧摆成像匹配方案.依据轨道衰减高度,设计侧摆成像匹配模型,计算出轨道高度与匹配成像侧摆角度之间的变化关系,对侧摆成像时的像移速度矢量、偏流角度、成像畸变等进行了定量的可行性分析,并利用蒙特卡洛方法分析了满足侧摆成像的卫星姿态指向精度和稳定度.利用基于小型三轴气浮台的小卫星姿态控制系统和TDI CCD相机成像系统进行仿真试验,结果表明,仿真图像的MTF函数和互相关相似性测度均在0.85以上,侧摆成像匹配方案能较好地满足轨道末期成像需求.
By analyzing the bottleneck problem of data readout, such as excessive data mismatch, such as severe mismatch, the satellite orbit imaging scheme of late-stage orbit satellites imaging is proposed.According to the orbital attenuation altitude, Model, the relationship between the orbital height and the angle of the side-to-side imaging is calculated, and the feasibility of the quantitative analysis of the image shift velocity vector, the drift angle and the imaging distortion in the side-to-side imaging is quantitatively analyzed and analyzed by the Monte Carlo method The attitude accuracy and the stability of the satellite are satisfied by the side-to-side imaging.The simulation experiments using the small satellite attitude control system and the TDI CCD camera imaging system based on a small three-axis air-floating platform show that the MTF function of the simulation image is similar to the cross-correlation The sexual measures are all above 0.85, and the side-to-side imaging matching scheme can better meet the needs of the end-orbit imaging.