Title: Study for Terrain effects correction using a SAR Interferometry Author(s): Boyeol Yoon, Younsoo Kim
SAR Interferometry(InSAR) is a process of using interference effects to determine lengths or changes in lengths very accurately. This technique has some similarities to stereo-optical imaging in that two images of the same area, viewed from different angles, are appropriately combined to extract the topographical information. Applications of InSAR are corrected for all geometry and brightness errors, and changes in elevation including sensitive change detection. The Radarsat SAR images to be InSAR processed into a corrected terrain effects were acquired on May 1, 1998 and May 25, 1998. In this research, to compute the interferogram, which is a map of the phase difference between the two images, they are coregisterd to accuracy accurately. After the interferogram has been generated, unwrap interferogram phase, and generate DEM from phase. This method has corrected terrain effects(layover, shadow, …) in effectively.
