红外预警卫星探测波段地球背景辐射仿真研究

针对红外预警卫星探测波段遥感数据难以获取的问题，研究了基于地表温度反演的红外预警卫星探测波段地球背景辐射仿真方法。采用了通用型单通道算法对FY-3/MERSI数据集进行地表温度反演，得到了全球地表温度分布图。在此基础上，构建了地表红外辐射模型，充分考虑了海拔、大气模式、地表类型等因素对地表辐射的影响，利用MATLAB与MODTRAN进行联合编程完成每个像元对应的地表辐射计算，实现了红外预警卫星探测波段地球背景辐射场景的图像生成。仿真结果表明:仿真图像分辨率高，能够准确反映红外预警卫星探测波段的地球背景辐射特性，可为研究红外预警卫星作战效能评估和目标识别技术提供场景数据支撑。

Research on simulation of earth background radiation in infrared early warning satellite detection waveband

Aiming at the problem that remote sensing data of detection band of infrared early warning satellite(IEWS) is difficult to obtain, the earth background radiation simulation method of IEWS detection waveband based on retrieving earth surface temperature was studied. The earth surface temperature distribution maps were generated by using a generalized single-channel algorithm for retrieving earth surface temperature of the FY-3/MERSI datasets. On this basis, the earth infrared radiation model was constructed, which fully considered the influence of altitude, atmospheric model, surface type and other factors on earth surface radiation. The joint programming of MATLAB and MODTRAN was used to calculate the surface radiation corresponding to each pixel, and realize the generation of earth background radiation image of IEWS detection band. The simulation results show that the simulated images have high resolution, and can accurately reflect the earth background radiation characteristics of IEWS detection waveband. The research result provides scene data support for studying IEWS operational effectiveness evaluation and target recognition technology.