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Proceedings Paper

Monitoring urban subsidence with coherent target analysis method
Author(s): Xin Tian; Lijun Lu; Mingsheng Liao; Deren Li; Zheng Fang; Hanmei Wang
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Paper Abstract

Coherent Target Analysis (CTA) method derived for the (Interferometric SAR) InSAR data processing has developed as one of the critical techniques in the field of surveying subtle land deformation. This paper discusses the principles and characteristics of CTA procedure, which can remove the errors caused by temporal and spatial decorrelation and atmospheric effects. The paper presents the validation of characteristics of CTA applied in city subsidence in Shanghai test site, where has been affected by subsidence for more than eighty years. The 32 scenes from the ERS-1/2 satellites covering the test area between 1992 and 2000 were chosen and processed. Based on the theory of CTA, we can get the map of land subsidence of Shanghai. Quality assessment between the velocity fields derived of CTA and that of leveling data observed on benchmarks within the same periods is then discussed. The comparison with ground leveling data shows the derived result from CTA approach is consistent with leveling data. The further investigation of CTA approach in Shanghai will be continued to improve the accuracy and robustness.

Paper Details

Date Published: 15 November 2007
PDF: 8 pages
Proc. SPIE 6787, MIPPR 2007: Multispectral Image Processing, 67871A (15 November 2007); doi: 10.1117/12.749343
Show Author Affiliations
Xin Tian, Wuhan Univ. (China)
Lijun Lu, Wuhan Univ. (China)
Mingsheng Liao, Wuhan Univ. (China)
Deren Li, Wuhan Univ. (China)
Zheng Fang, Shanghai Institute of Geological Survey (China)
Hanmei Wang, Shanghai Institute of Geological Survey (China)

Published in SPIE Proceedings Vol. 6787:
MIPPR 2007: Multispectral Image Processing
Henri Maître; Hong Sun; Jianguo Liu; Enmin Song, Editor(s)

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