复杂地表背景下动目标天基红外探测图像仿真

Simulation of Space-based Infrared Detection Images for Moving Targets in Complex Earth Surface Background

面向天基红外探测图像仿真需求,基于导弹内外流场的流动控制方程和辐射计算方程构建弹道导弹辐射仿真模型,基于全球地表类型数据库(GlobCover)和随机分形算法构建复杂地表背景辐射仿真模型,基于严密成像几何模型提出星载相机入瞳处场景耦合辐射仿真方法。进一步叠加探测系统成像链路中的光学系统、探测器和信号处理模型,提出一种复杂地表背景下运动目标天基红外探测图像仿真方法。仿真结果表明,利用卫星轨道参数和导弹目标弹道数据,采用该方法可以实现卫星对弹道导弹主动段的连续成像仿真。

For the simulation requirements of space-based infrared detection images,a missile radiation simulation model was developed based on the governing equations of missile internal and external flow field and the radiation calculation equation.An earth surface background radiation simulation model was developed based on the GlobCover and the random fractal algorithm.A coupling simulation method of entrance pupil radiaiton in satelite camera was proposed based on rigorous imaging geometric model.In addition,a simulation method of space-based infrared detection images for moving targets in complex earth surface background was proposed,coupling the models of optical system,detector and signal processing in the imaging link of detection system.The simulation results reveal that based on the data of satelite orbit and missile trajectory,the proposed method can be applied to achieve the continuous imaging simulation of the missile in the boosting phase.