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为提高红外高光谱目标特性仿真的逼真度,提出了一种辐射影响计算模型,用于计算目标周围的建筑物对目标的最终辐射特性的影响.建立了一个虚拟实验场景,设定场景的大气环境为1976年的美国标准大气.在建立的虚拟场景上在中波红外3.0～5.0 μm范围内以0.01 μm为步长对目标所受的辐射影响进行了仿真计算,并将辐射影响与太阳辐射、目标自身辐射进行了比较.实验结果显示在中波红外的某些波段范围内,相邻建筑单位面积的辐射影响亮度要高于太阳辐射亮度和目标自身辐射亮度.这表明在图像立方体的某些图像中,辐射影响是成像的最主要的辐射源,证明了多光谱/高光谱仿真情况下该模型的必要性和重要性.通过对仿真结果的分析,确定了建筑表面温度、大气透过率和有效辐射面积是辐射影响因素中的三个关键因素.“,”In order to improve the fidelity of the IR hyperspectral target characteristic simulation,an influence model was presented in this paper to calculate the influence of the nearby building on the target final radiation at certain wavelength.A virtual experiment scene was constructed with 1976 U.S.standard atmosphere.Simulation experiments were done based on the constructed virtual scene in 3.0-5.0 μm at intervals of 0.01 μm,and the calculation results were compared with the target reflected solar radiation and the target self-radiation.Experiments results show that the radiation influence from the building are higher than the target reflected solar radiation or the target self-radiation at some waveband ranges,which means the radiation influence is the most critical radiation in some images of the image cube.It proves the influence model presented in this paper is necessary and important in hyperspectral simulation.Through the analysis of simulation results,the building surface temperature,atmosphere transmittance and the valid radiation area are determined to be the 3 key factors to affect the influence radiation of nearby building.