辐射校正与几何校正是遥感信息定量化应用的重要步骤，对真实反映目标和背景特征以及实际地理位置是至关重要的。提出了LANDSAT 5 TM数据的辐射校正方法与使用精确星历参数进行数据处理后的几何定位精度，并以实际数据检验了修正后的中国遥感卫星地面站的LANDSAT 5卫星数据产品的辐射精度与几何定位精度，检验结果表明，中国遥感卫星地面站对LANDSAT 5卫星数据的系统处理方法有效地消除了成像过程中的系统性误差。

Radiometric correction and geospatial correction , which are two key steps for quantitative remote sensing information, are crucial to reveal the target and background character and the actual geographical position. In this paper, a method of radiometric correction and the geospatial positioning accuracy of Landsat 5 TM data processed with precise ephemeris parameters is introduced. Test with the Landsat 5 TM data verified that the method used in China Remote Sensing Satellite Ground Station is effective to eliminate the system errors produced during the imaging process.