Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/16997
Title: Six years of land subsidence in shanghai revealed by JERS-1 SAR data
Authors: Damoah-Afari, P
Ding, XL 
Li, Z
Lu, Z
Omura, M
Keywords: Coherence analysis
Differential interferometry
DInSAR
JERS-1
Land subsidence
Issue Date: 2007
Source: International Geoscience and Remote Sensing Symposium (IGARSS), 2007, 4423246, p. 2093-2097 (CD) How to cite?
Abstract: Differential interferometric synthetic aperture radar (SAR) (DInSAR) has proven to be very useful in mapping and monitoring land subsidence in many regions of the world. Shanghai, China's largest city, is one of such areas suffering from land subsidence as a result of severe withdrawal of groundwater for different usages. DInSAR application in Shanghai with the C-band European Remote Sensing 1 & 2 (ERS-1/2) SAR data has been difficult mainly due to the problem of decorrelation of InSAR pairs with temporal baselines larger than 10 months. To overcome the coherence loss of C-band InSAR data, we used eight L-band Japanese Earth Resource Satellite (JERS-1) SAR data acquired during 2 October 1992 to 15 July 1998 to study land subsidence phenomenon in Shanghai. Three of the images were used to produce two separate digital elevation models (DEMs) of the study area to remove topographic fringes from the interferograms used for subsidence mapping. Six interferograms were used to generate 2 different time series of deformation maps over Shanghai. The cumulative subsidence map generated from each of the time series is in agreement with the land subsidence measurements of Shanghai city from 1990-1998, produced from other survey methods.
Description: 2007 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2007, Barcelona, 23-28 June 2007
URI: http://hdl.handle.net/10397/16997
ISBN: 1424412129
9781424412129
DOI: 10.1109/IGARSS.2007.4423246
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