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空间目标的等效辐射温度、等效辐射面积是主要的红外辐射特征。通过测量空间目标温度并分析其变化规律,可以推断空间目标的性质,判断目标的在轨工作状态。基于比色测温原理建立了空间目标温度和等效辐射面积测量数学模型,结合系统特性、目标辐射特性和红外辐射大气传输特性优选系统的工作波长,采用简单实用的程序,实现了空间目标温度和等效辐射面积的地基测量。实验结果表明:在测温范围293～353 K内,当系统的工作波长为λ1=8.01μm,λ2=8.04μm,波段宽度取20 nm,波段间隔取30 nm较为合适。温度分辨力达到7 K,测量数据可用于地基空间目标分类与识别,为地基探测设备的研制和检测提供依据。
The equivalent target radiation temperature, the equivalent radiation area is the main infrared radiation characteristics. By measuring the temperature of the space target and analyzing its variation, we can infer the nature of the space target and judge the on-orbit working status of the target. Based on the principle of colorimetric temperature measurement, a mathematical model of space target temperature and equivalent radiation area measurement was established. Based on the system characteristics, target radiation characteristics and infrared radiation atmospheric transmission characteristics, the working wavelength of the system was optimized. A simple and practical program was used to achieve the spatial target temperature And the equivalent radiation area of the ground measurement. The experimental results show that it is suitable for the system to operate at a wavelength of λ1 = 8.01μm and λ2 = 8.04μm with a wavelength band of 20 nm and a band interval of 30 nm in the temperature range of 293 ~ 353 K. The temperature resolution reaches 7 K, and the measured data can be used for the classification and identification of the foundation space. It provides the basis for the research and testing of the foundation detection equipment.