BACKSCATTERING CHARACTERISTICS OF BRIDGES FROM HIGH-RESOLUTION X-BAND SAR IMAGERY

摘要

As the advances in the sensor technology, high-resolution SAR imagery data have been available to distinguish man-made objects in urban areas. Bridges are important elements of the traffic network. In this study, the fundamental investigation was carried out to clarify backscattering characteristics of bridges over water in TerraSAR-X satellite images and Pi-SAR2 aerial images. Sixteen bridges around Tokyo, Japan, were selected as the targets. The relationship between those phenomena and the acquisition conditions was discussed by comparing several SAR images. By grasping the backscatter characteristics of the bridges, the possibility of detecting bridge damages from SAR images was indicated.