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Proceedings Paper

A high resolution InSAR topographic reconstruction research in urban area based on TerraSAR-X data
Author(s): Feifei Qu; Zhang Qin; Chaoying Zhao; Wu Zhu
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Paper 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.

Paper Details

Date Published: 24 October 2011
PDF: 11 pages
Proc. SPIE 8286, International Symposium on Lidar and Radar Mapping 2011: Technologies and Applications, 82860I (24 October 2011); doi: 10.1117/12.912433
Show Author Affiliations
Feifei Qu, Chang'an Univ. (China)
Zhang Qin, Chang'an Univ. (China)
Key Lab. of Western China's Mineral Resources and Geological Engineering (China)
Chaoying Zhao, Chang'an Univ. (China)
Key Lab. of Western China's Mineral Resources and Geological Engineering (China)
Wu Zhu, Chang'an Univ. (China)


Published in SPIE Proceedings Vol. 8286:
International Symposium on Lidar and Radar Mapping 2011: Technologies and Applications
Jonathan Li, Editor(s)

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