讨论了地形、大气以及地理位置对卫片像元上光辐射三分量（直射、散射、邻坡反射）的影响和这种影响所引起的卫星遥感数据变化。研究了地面光辐射、地形、大气和遥感数据之间的定量关系，并以此为基础，研究了卫星遥感数字图像地面辐射改正的原理和方法。经地面辐射改正后的卫星遥感数据能满足遥感应用基础研究和地面辐射状况研究的需要。 The effects of terrain, atmosphere and geographical location on the three components (direct, scattered, and adjacent reflection) of the light and the radiation on a patch image were discussed. The satellite remote sensing data changes caused by this effect were also discussed. The quantitative relationship between terrestrial light radiation, topography, atmosphere and remote sensing data was studied. Based on this, the principle and method of ground radiation correction for satellite remote sensing digital images were studied. The satellite remote sensing data corrected by the ground radiation can meet the needs of the basic research of remote sensing application and the research of the ground radiation status.