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《Journal of University of Science and Technology of China》 2013-02
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Accuracy assessment of TH-1 satellite image geometric correction using rational function model and polynomial model

ZHU Qian1,LI Xia1,LI Shaofeng2(1.College of Earth Science and Resources,Chang'an University,Xi'an 710054,China; 2.Geodetic First Team,National Administration of Surveying,Mapping and Geoinformation,Xi'an 710054,China)  
Based on RFM(rational function model) and the polynomial model,the geometric correction precision of TH-1 satellite images was studied on different landforms,and the relationship between the number of GCPs(ground control points) and geometric correction precision was also studied.Experimental results show that TH-1 images have a magnitude distortion caused by optical projection;RFM can obviously improve TH-1 geometric correction precision with only a few GCPs;in the polynomial model,more GCPs can achieve higher correction precision,and 2 order can get the highest correction precision;without a parameter model,high order RFM is the best choice for TH-1 image geometric correction.
【Fund】: 国家自然科学基金(41101445)资助
【CateGory Index】: TP751;P237
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