Ground settlement monitoring based on temporarily coherent points between two SAR acquisitions

ISPRS Journal of Photogrammetry and Remote Sensing
By: , and 

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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.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Ground settlement monitoring based on temporarily coherent points between two SAR acquisitions
Series title ISPRS Journal of Photogrammetry and Remote Sensing
DOI 10.1016/j.isprsjprs.2010.10.004
Volume 66
Issue 1
Year Published 2011
Language English
Publisher Elsevier
Contributing office(s) Earth Resources Observation and Science (EROS) Center
Description 7 p.
First page 146
Last page 152