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

Lei Zhang; Xiaoli Ding; Zhong Lu

doi:10.1016/j.isprsjprs.2010.10.004

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

Lei Zhang, Xiaoli Ding, Zhong Lu

Research output: Journal article publication › Journal article › Academic research › peer-review

119 Citations (Scopus)

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. (ISPRS).

Original language	English
Pages (from-to)	146-152
Number of pages	7
Journal	ISPRS Journal of Photogrammetry and Remote Sensing
Volume	66
Issue number	1
DOIs	https://doi.org/10.1016/j.isprsjprs.2010.10.004
Publication status	Published - 1 Jan 2011

Keywords

Change detection
Comparison
Monitoring
SAR
Statistics

ASJC Scopus subject areas

Geography, Planning and Development
Atomic and Molecular Physics, and Optics
Engineering (miscellaneous)
Computer Science Applications
Computers in Earth Sciences

More information

10.1016/j.isprsjprs.2010.10.004

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AU - Ding, Xiaoli

AU - Lu, Zhong

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KW - Comparison

KW - Monitoring

KW - SAR

KW - Statistics

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

Abstract

Keywords

ASJC Scopus subject areas

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