A high resolution InSAR topographic reconstruction research in urban area based on TerraSAR-X data

Feifei Qu; Zhang Qin; Chaoying Zhao; Wu Zhu

doi:10.1117/12.912433

24 October 2011 A high resolution InSAR topographic reconstruction research in urban area based on TerraSAR-X data

Feifei Qu, Zhang Qin, Chaoying Zhao, Wu Zhu

Proceedings Volume 8286, International Symposium on Lidar and Radar Mapping 2011: Technologies and Applications; 82860I (2011) https://doi.org/10.1117/12.912433
Event: International Symposium on Lidar and Radar Mapping Technologies, 2011, Nanjing, China

Abstract

Aiming at the problems of difficult unwrapping and phase noise in InSAR DEM reconstruction, especially for the high-resolution TerraSAR-X data, this paper improved the height reconstruction algorithm in view of "remove-restore" based on external coarse DEM and multi-interferogram processing, proposed a height calibration method based on CR+GPS data. Several measures have been taken for urban high resolution DEM reconstruction with TerraSAR data. The SAR interferometric pairs with long spatial and short temporal baselines are served for the DEM. The external low resolution and low accuracy DEM is applied for the "remove-restore" concept to ease the phase unwrapping. The stochastic errors including atmospheric effects and phase noise are suppressed by weighted averaging of DEM phases. Six TerraSAR-X data are applied to create the twelve-meter's resolution DEM over Xian, China with the newly-proposed method. The heights in discrete GPS benchmarks are used to calibrate the result, and the RMS of 3.29 meter is achieved by comparing with 1:50000 DEM.

Citation Download Citation

Feifei Qu, Zhang Qin, Chaoying Zhao, and Wu Zhu "A high resolution InSAR topographic reconstruction research in urban area based on TerraSAR-X data", Proc. SPIE 8286, International Symposium on Lidar and Radar Mapping 2011: Technologies and Applications, 82860I (24 October 2011); https://doi.org/10.1117/12.912433

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