近地卫星地球反照系数的一种估计方法  

Earth Albedo Coefficient Estimation to LEO Satellite

作　　者：李强[1] 孙先伟[1] 林乐天 高超[1] 王巧[1] 胡兴[1] 

机构地区：[1]西安卫星测控中心,西安710043

出　　处：《航天器工程》2015年第3期17-21,共5页Spacecraft Engineering

摘　　要：针对地球反照对近地卫星太阳电池阵的影响,分析卫星轨道与星下点的受照射情况,进而建立太阳电池阵输出电流模型,利用太阳电池阵电流的遥测数据,根据最小二乘法给出地球反照下的输出电流模型参数,然后利用延时遥测数据与拟合数据计算地球反照系数,同时分析地球反照对于太阳电池阵输出电流的影响,最后结合某低轨卫星的实际在轨测控数据进行验证.结果表明,对于630 km高度的近地卫星,地球反照系数在5％～8％之间;且随季节变化明显,从春至秋逐渐减小,从秋至春又逐渐增大;可为测控中的遥测诊断提供参考.With respect to the earth alb by considering model of solar mean square th the solar angle different edo effect to LEO satellite solar array output current, and from that in solar array driving mode, an output current array has presented to estimate amplitude, phase and direct current with least at is used in the measured data processing. The earth albedo coefficient has been calculated in two different ways, one with original data of delayed telemetry and the other with fitting data of current estimation. Validated by LEO satellite engineering management in TTC, the final result has shown that the earth albedo coefficient is between 5% and 8%, descending from spring to fall and ascending from fall to spring and is a numerical reference to telemetry diagnose in TT＆C.

关 键 词：卫星 地球反照系数 太阳电池阵 电流 遥测 

分 类 号：V442[航空宇航科学与技术—飞行器设计]