红外预警卫星空间虚警源辐射特性分析

针对红外预警卫星的虚警问题，研究了地球同步轨道红外预警卫星的空间辐射环境。在计算卫星探测谱段内的地球背景辐射特性并将其作为衡量基准的基础上，分析了空间环境中可能造成红外预警卫星虚警的辐射源，并对各种空间辐射源在红外预警卫星短波探测谱段2.63~2.83 m和中波探测谱段4.18~4.50 m的辐射特性进行了数值计算。结果表明:太阳直接辐射对卫星探测器的辐照度远大于卫星的背景辐射强度，应采取规避措施；红外预警卫星的主要虚警源为月球辐射和近地轨道航天器辐射；月球辐射的影响主要来自镜头的聚焦作用；近地轨道航天器辐射的影响发生在红外预警卫星的中波探测谱段，研究结果可为研究相应的背景抑制及虚警源识别技术提供参考。

Radiation characteristics analysis of space false alarm sources for infrared early warning satellite

According to the false alarm problem in infrared early warning satellite, the space radiation environment of the geosynchronous orbit infrared early warning satellite was studied. Based on the analysis of satellite's background radiation characteristics in the detection spectrum and as a benchmark, the radiation sources in space environment that may cause false alarms of infrared early warning satellite were analyzed. The radiation characteristics of various sources in the 2.63-2.83 m short-wave detection spectrum and the 4.18-4.50 m medium-wave detection spectrum of infrared early warning satellite were discussed and calculated individually. The results show that the irradiance of direct solar radiation on the satellite detector is much larger than the background radiation intensity of the satellite, so evasive measures should be taken. The main false alarm sources of infrared early warning satellite are lunar radiation and low-Earth orbit spacecraft radiation. The influence of lunar radiation is mainly due to the focusing factor of lens. The influence of near-Earth orbit spacecraft radiation occurs in the mid-wave detection spectrum of infrared early warning satellite. The research results can provide reference for the study of corresponding background suppression and false alarm sources identification technology.