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.