空间目标探测与识别的波段选择

Waveband Selection for Space Target Detection and Identification

介绍了根据目标的反射率实验测量和大气光谱特征对大气层外目标进行探测的波段选择方法。测量出样品及标准板的反射光强度，计算出样品的光谱反射率，在考虑空间目标自身的辐射强度、光谱反射率、背景大气的辐射亮度、目标-背景对比度、不同波段斜程透过率等诸多因素后进行波段选择。利用MODTRAN大气传输模型计算了目标亮度、背景大气的辐射亮度、对比度以及不同波段斜程透过率的典型光谱特征、并进行光谱特征分析，综合考虑目标的视亮度以及对比度，结果表明0．76～0．90μm是包覆黄色镀铝聚酯薄膜的目标最佳探测波段，0．52～0．60μm是包覆银色镀铝聚酯薄膜的目标最佳探测波段。

Based on the measured spectral reflectivity and the spectral signature of atmosphere radiation, a waveband selection method is given to detect target outside atmosphere. The reflection spectra of the samples and standard board are measured, and the spectral reflectivity of the samples is obtained. In order to improve the target identification, waveband selection is proceeded after considering the target radiation, the spectral reflectivity, the background radiation, the target-background contrast, the transmittance of slanting path and so on. The typical spectral characteristics of the above considerations are calculated by the atmospheric transmission model software MODTRAN and analyzed. The results show that 0.76-0.90 μm is the optimal detection waveband for target with yellow aluminium-coated polyester thin-film, and 0.52 -0.60μm for target with silver aluminium-coated polyester thin-film.