Study on Geometric Rectification for FY-2 S-VISSR Data

This Paper proposed a simple and effective geometric rectification approach for FY-2 S-VISSR data.In this Method,FY-2 normalized projective latitude and longitude comparison Table is used as the reference image,while FY-2 S-VISSR data is used as the input image.Firstly,the tie points between the two images are found by the simplified mapping grid data of S-VISSR data;Secondly,the geometric transformation model between the two images is estimated by using the tie points;Finally,the input image is rectified by the fixed geometric transformation.The experiments demonstrated that FY-2 S-VISSR data could be rectified effectively by using the proposed approach,and the accuracy of rectification achieved one pixel or so.