地形条件对空间目标细致光谱辐射特性的影响

随着多光谱、高光谱和超光谱探测技术的发展，探测识别目标发出的细致光谱辐射特性技术日益成熟。建立了一种空间目标细致光谱有效辐射的计算模型，考虑了地形条件和大气环境对目标的光谱有效辐射影响，分别计算了传统方法和两种设置的典型地形条件下空间目标各表面的温度和细致光谱有效辐射，分析了3~5 m和8~14 m波段下导致目标有效辐射强度随波长变化的主要影响因素，最后分析了在不同地形条件下空间目标在8.69~9.00 m探测波段内的辐射特性。结果表明，地形条件对空间目标的温度和有效辐射有较大影响，尤其是地表反照率对地球反射太阳辐射的影响较大，特别是空间目标朝向地球的面，在两种典型条件下的最大温差可以达到69.2 K，光谱有效辐射出射度偏差达到7.002 W/（m2m）。

Effects of terrain conditions on the detailed spectral radiation characteristics of the space target

With the development of multispectral, hyperspectral and hyperspectral detection technology, the technology of detecting and recognizing the detailed spectral radiation characteristics emitted by the space target became increasingly mature. A model for calculating the fine spectral effective radiation of the space target was established. Considering the influence of terrain and atmospheric environment on the spectral effective radiation of the space target, the temperature and fine spectral effective radiation of each surface of the space target under the traditional method and two typical terrain conditions were calculated respectively. The effective radiation intensity of the space target at 3-5 m and 8-14 m bands was analyzed with respect to wavelength. Finally, the radiation characteristics of space target at 8.69-9.00 m detection band under different terrain conditions were analyzed. The results show that the terrain conditions had a great influence on the temperature and effective radiation of the space target, especially the surface albedo had a great influence on the solar radiation reflected by the earth. For the surface of the space target facing the earth, the maximum temperature difference could reach 69.2 K under the two typical conditions, and the deviation of spectral effective radiation emittance reached 7.002 W/(m2m).