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Ultrashort-baseline Persistent Scatterer Radar Interferometry for Subsidence Detection : Volume I-7, Issue 1 (16/07/2012)

By Liu, G.

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Book Id: WPLBN0004013722
Format Type: PDF Article :
File Size: Pages 8
Reproduction Date: 2015

Title: Ultrashort-baseline Persistent Scatterer Radar Interferometry for Subsidence Detection : Volume I-7, Issue 1 (16/07/2012)  
Author: Liu, G.
Volume: Vol. I-7, Issue 1
Language: English
Subject: Science, Isprs, Annals
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2012
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Chen, Q., Jia, H., Liu, G., Li, Z., Cai, G., Luo, X., & Zhang, R. (2012). Ultrashort-baseline Persistent Scatterer Radar Interferometry for Subsidence Detection : Volume I-7, Issue 1 (16/07/2012). Retrieved from http://www.ebooklibrary.org/


Description
Description: Dept. of Remote Sensing and Geospatial Information Engineering, Southwest Jiaotong University, Chengdu, Sichuan, 610031, China. This paper presents an improved approach of multi-temporal interferometric synthetic aperture radar (InSAR) for detecting land subsidence phenomena by using time series of high resolution SAR images. Our algorithm extends the capability of the temporarily coherent point (TCP) InSAR technique proposed previously to detect subsidence even in the case of a small number of SAR images available for a study area. The approach proposed in this paper is implemented by using the interferograms with ultrashort spatial baselines (USB) through several procedures, including selection of USB interferometric pairs, TCP identification, TCP networking and modeling, as well as TCP solution. As the topographic effects are negligible in the USB interferograms, an external digital elevation model is no longer necessary for differential processing, thus simplifying both TCP modeling and parameter estimating. The algorithm has been tested with the high resolution TerraSAR-X (TSX) images acquired over Tianjin (China), and validated by using the ground-based leveling measurements. The testing results indicate that the density and coverage extent of TCPs can be increased dramatically, and the quality of subsidence measurements derived by the USB-based TCPInSAR can be raised.

Summary
ULTRASHORT-BASELINE PERSISTENT SCATTERER RADAR INTERFEROMETRY FOR SUBSIDENCE DETECTION

 

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