A New Method of SAR Images Geometric Rectification Under Undulate Areas Based on the Application of Navigation
The guidance precision can be improved greatly when the synthetic aperture radar (SAR) is used in the navigation system of aircraft or missile.However,the inherent geometric distortion of SAR images under undulate areas makes the matching navigation error to be increased.So,it is necessary to research geometric rectification methods for SAR images under undulate areas. A new method of SAR image geometric correction under undulate areas based on the application of navigation is presented in the paper.Firstly,it rectifies the range position error caused by elevation in the slant range plane.Secondly,it corrects the position error caused by the scale difference between slant range and ground range in the ground plane.Lastly,it transforms the reference frame of the real-time image to the map according to the course angle.In the end,a simulation using the DEM data of GUIZHOU of China is given,which gets perfect results,to testify the val idity and accuracy of the method.
synthetic aperture radar SAR image geometric rectification matching navigation
Sanhai Ren Wenge Chang
School of Electronic Science and Engineering,National University of Defence Technology Changsha,410073,P.R.China
国际会议
2009 2nd Asian-Pacific Conference on Synthetic Aperture Radar(第二届亚太合成孔径雷达会议)
西安
英文
836-839
2009-10-26（万方平台首次上网日期，不代表论文的发表时间）