Utilization of airborne multi-aspect InSAR data for the generation of urban ortho-images

This paper addresses the generation of “true” RADAR ortho-images from highest resolution multi-aspect InSAR data. Due to the side-looking SAR imaging geometry, the well-known layover and shadowing effects prevent the production of truly rectified ortho-imagery from one image alone. Here, an approach for the reconstruction of Digital Surface Models of densely built inner city areas is proposed. Since in SAR interferometry each dataset pixel contains not only the interferometric phase needed for 3D reconstruction but also the corresponding amplitude or intensity value, respectively, the procedure can also be seen in the context of true ortho-rectification.