Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/10069
Title: Ground settlement monitoring based on temporarily coherent points between two SAR acquisitions
Authors: Zhang, L 
Ding, X 
Lu, Z
Issue Date: 2011
Source: ISPRS Journal of Photogrammetry and Remote Sensing, 2011, v. 66, no. 1, p. 146-152
Abstract: An InSAR analysis approach for identifying and extracting the temporarily coherent points (TCP) that exist between two SAR acquisitions and for determining motions of the TCP is presented for applications such as ground settlement monitoring. TCP are identified based on the spatial characteristics of the range and azimuth offsets of coherent radar scatterers. A method for coregistering TCP based on the offsets of TCP is given to reduce the coregistration errors at TCP. An improved phase unwrapping method based on the minimum cost flow (MCF) algorithm and local Delaunay triangulation is also proposed for sparse TCP data. The proposed algorithms are validated using a test site in Hong Kong. The test results show that the algorithms work satisfactorily for various ground features.
Keywords: Change detection
Comparison
Monitoring
SAR
Statistics
Journal: ISPRS Journal of Photogrammetry and Remote Sensing 
ISSN: 0924-2716
DOI: 10.1016/j.isprsjprs.2010.10.004
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