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8112北京师范大学学报(自然科学版)第59卷Radiometric correction of BNU-1 wide-swath imageryZHANG ZhuoyuZHANG Ying( State Key Laboratory of Remote Sensing Science,College of Global Change and Earth System Science,Beijing Normal University,100875,Beijing,China)AbstractBNU-1,the first civil polar optical micro-sat developed by Chinese scientists,is equipped with amedium and high-resolution multi-spectral wide-swath camera,and takes into account both revisit cycle andresolution. BNU-1 is of great significance for the study of climate and environment change and monitoring in polarregions,at high coverage and medium resolution. However,the band noise of level 0 data masks the ground feature ofimage and does not reflect the real radiation characteristics of ground features,seriously affecting data application.Therefore,in this paper a method is proposed to remove the strip based on statistical principle for wide-swath image.The algorithm uses the dark noise extraction method corresponding to the image of 0° solar altitude angle and theuniform scene mask method to extract offset and gain values of each detector respectively,and realizes the stripremoval. Experimental data indicate that compared to original data,this algorithm robustly removes band noise,restores real surface radiation information,and gives full play to the application value of multispectral data of BNU-1.KeywordsBNU-1;the Antarctic;strip noise;radiometric correction【责任编辑:刘先勤】