High Accuracy DEM Reconstruction Using SAR Clinometry and Interferometry Method
In this paper, a novel method is proposed by combining of radar clinometry and interferometry to improve the accuracy of digital elevation model (DEM) reconstruction. In synthetic aperture radar (SAR) signal processing, the interferometry method uses a couple of high-coherence SAR complex images and the clinometry method uses only one. On one hand, interferometry-derived DEM is much more accurate in regions of higher coherence than the clinometry one. However, in regions of lower coherence, some pronounced errors are produced with the interferometry method due to phase filtering and unwrapping problems. On the other hand, the clinometry method can produce a more robust DEM result by using the intensity of SAR image. Therefore the clinometry-and interferometry-derived DEM is fused by introducing a user-defined weighting factor, where in regions of higher coherence, the DEM results with the interferometry method are remained, and in regions of lower coherence, the interferometryderived DEM is updated with the clinometry-derived one. Finally, the experimental results with Envisat data show the effectiveness of our approach.
Digital elevation model (DEM) interferometric synthetic aperture radar (SAR) clinometry interferometry.
HOU Jian Guo CHU Yu XIANG Zheng
Heilongjiang Institute of Technology, Harbin Heilongjiang 150030 Heilongjiang Institute of Geological Survey, Harbin Heilongjiang 150030 Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240
国际会议
海口
英文
179-183
2011-02-22（万方平台首次上网日期，不代表论文的发表时间）