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http://dx.doi.org/10.7780/kjrs.2011.27.2.181

High Resolution InSAR Phase Simulation using DSM in Urban Areas  

Yoon, Geun-Won (The third R&D Institute, Agency for Defense Development)
Kim, Sang-Wan (Department of Geoinformation Engineering, Sejong University)
Lee, Yong-Woong (The third R&D Institute, Agency for Defense Development)
Lee, Dong-Cheon (Department of Geoinformation Engineering, Sejong University)
Won, Joong-Sun (Department of Earth System sciences, Yonsei University)
Publication Information
Korean Journal of Remote Sensing / v.27, no.2, 2011 , pp. 181-190 More about this Journal
Abstract
Since the radar satellite missions such as TerraSAR-X and COSMO-SkyMed were launched in 2007, the spatial resolution of spaceborne SAR(Synthetic Aperture Radar) images reaches about 1 meter at spotlight mode. In 2011, the first Korean SAR satellite, KOMPSAT-5, will be launched, operating at X-band with the highest spatial resolution of 1 m as well. The improved spatial resolution of state-of-the-art SAR sensor suggests expanding InSAR(Interferometric SAR) analysis in urban monitoring. By the way, the shadow and layover phenomena are more prominent in urban areas due to building structure because of inherent side-looking geometry of SAR system. Up to date the most conventional algorithms do not consider the return signals at the frontage of building during InSAR phase and SAR intensity simulation. In this study the new algorithm introducing multi-scattering in layover region is proposed for phase and intensity simulation, which is utilized a precise LIDAR DSM(Digital Surface Model) in urban areas. The InSAR phases simulated by the proposed method are compared with TerraSAR-X spotlight data. As a result, both InSAR phases are well matched, even in layover areas. This study will be applied to urban monitoring using high resolution SAR data, in terms of change detection and displacement monitoring at the scale of building unit.
Keywords
SAR; Interferometry; High resolution; Phase simulation; Urban area; LIDAR DSM;
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