短波红外用于白天卫星探测的研究

从白天天空背景、卫星光学特性及红外波段在大气中的传输特性三方面分析了白天卫星探测的可行性。在此基础上,采用光谱滤波的方法,利用红外焦平面阵列(IRFPA),在短波红外波段进行了卫星跟踪与测量。理论分析和白天的测星实验表明,用短波红外波段能够实现白天卫星的跟踪与测量;通过与已知星等的G型光谱类型恒星测量值的比对得到了目标卫星的星等为6.34,给出了探测系统的跟踪误差。

Study on application of short wave infrared to detecting satellites in the daytime

From the factors of sky background in the daytime,optical specialities of satellites and transferring features of infrared through atmosphere,the feasibilities of detecting satellites in the daytime are analyzed.The satellites are tracked and measured by filtering spectrum and applying the method of infrared focal plane array(IRFPA).Both the theoretical analysis and daytime detecting tests demonstrate that satellites are able to be tracked and measured in the daytime by using short wave infrared(SWIR)spectra.Meanwhile,by comparing the measured values and that of the known magnitude's stars of G type spectrum,it is obtained that the object satellite's magnitude is 6.34,and the tracking error is also presented.