GMS卫星资料估算地表旬太阳辐射

GMS－5静止气象卫星较宽的可见光波段，为估算到达地表的太阳辐射提供了极好的信息源。利用GMS－5可见光通道资料，分析估计太阳辐射的可行性，并给出了相应的卫星资料处理方法。利用逐时观测资料和济南日射观测站太阳总辐射小时辐照总量实测资料，建立了可见光反照率与小时辐照总量的统计关系，探讨了旬太阳辐射的估算模型。估算结果与日射站实测结果比较，旬辐射估计量的均方误差为7．7MJ.m^-1，平均相对误差为3．4％。

Estimation of Dekad Solar Radiation with GMS-5 Data

The wider visible frequency range of GMS-5 satellite provides wonderful information for calculating solar radiation to reach the earth surface. First,the feasibility of estimating solar radiation using GMS-5 visible channel data is analysed,and the corresponding method of processing satellite data is given.Then,the statistical relation between the visible albedo and solar irradiance is established , and the estimating model of dekad solar radiation is also discussed. Through the comparison of dekad solar radiation estimating result with actual observation data ,the mean square error is 7.7MJ·m^-2,the mean relative error is 3.4%.