为了给在轨卫星红外地球敏感器性能评估提供更多参考依据,通过对某颗长期在轨正常运行卫星所配置的红外地球敏感器辐射强度数据进行统计分析,给出辐射强度短期、中期和长期的变化规律,并分析造成这种变化的内在机理.分析结果表明,辐射强度短期与星下点纬度相关且呈周期变化;中期与季节相关且呈周期变化;长期主要与红外地球敏感器自身特性相关呈逐渐衰减趋势.该结果可以作为在轨红外辐射强度判读的依据. In order to provide more references for the performance evaluation of orbiting satellites, this paper analyzes the radiation intensity data of infrared earth sensors configured by a long-term orbiting orbiting satellite and gives the radiation intensity in short, medium and long term And analyzes the internal mechanism of this change.The analysis results show that the radiation intensity is related to the subsatellite point latitude and changes periodically; the mid-term is related to the season and changes periodically; the long-term and infrared earth sensor itself The correlation shows a gradual decay trend.The results can be used as the basis for interpretation of the orbital infrared radiation intensity.