Preprocess Order of HJ Satellite Data

In the processing of mass remote sensing products production,the influence resul-ted from different radiometric and geometric correction orders has not been analyzed overall.So it is highly meaningful to quantitative analyze of the images discrepancy caused by differ-ent radiometric and geometric correction orders.It will help to clear the influences caused bythe changing correction orders,and also play a significant role on improving the accuracy ofquantitative products.We used HJ-1Bsatellite CCD data as fundamental datum and pro-cessed them.Firstly,integrating data characteristics,we determined methods of radiometricand geometric correction.Secondly,technology roadmap was designed by changing the radi-ation and geometric correction order.Finally,the results obtained by different orders of ra-diometric calibration and geometric correction were quantitative analyzed from two aspects ofstatistical characteristics and texture features of images.The experimental results showedthat in the statistical and texture indexes of results,most of them had little difference.Theexperimental results can prove a fact that different correction orders have a little influence onthe pretreatment results.