针对LEO(Low Earth Orbit,近地轨道)卫星的太阳电池阵输出功率衰减问题,在分析卫星轨道半长轴、太阳入射角、日地距离等参数变化与影响的基础上,提出按照轨道衰减快慢来区分太阳活动高年与低年,进而通过区分高年与低年,再根据不同季节分别进行太阳电池阵输出功率的衰减估计,而无须做功率归一化。同时,重点关注了夏至前后的最低输出功率的衰减情况,以此作为在轨卫星长期管理中的能源参考,建立平均电流和功率衰减因子估计模型,并结合实际工程数据进行了衰减估计。结果表明,太阳电池阵输出功率的年衰减因子约为-0.012,年衰减率约为1.2%。该结果可应用于在轨卫星长期管理的遥测诊断辅助。 Based on the analysis of the variation and influence of parameters such as the semi-major axis of the satellite orbit, the solar incident angle, the distance between the sun and the earth and so on, aiming at the attenuation of the output power of the solar array in LEO (Low Earth Orbit) satellite, To distinguish the high and low solar activity, and then through the distinction between high and low years, and then according to different seasons solar cell array output power attenuation estimates, without the need to do power normalization. At the same time, the focus is on the attenuation of the minimum output power before and after the summer solstice, which is used as an energy reference in the long-term management of orbiting satellites. The average current and power attenuation factor estimation model is established, and the attenuation estimation is made based on the actual engineering data. The results show that the annual attenuation factor of solar array output power is about -0.012, and the annual attenuation rate is about 1.2%. This result can be applied to the long-term management of on-orbit satellite telemetry diagnostic aids.