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-InSAR
(a)Coherence
Figure 5 The interferogram generated using the two ASAR images.
In the differential interferogram (b), we can see the clear stripe
represents 28 mm displacement.
5. CONCLUSION
Differential SAR interferometry has shown a high performance
in mine subsidence monitoring in Tang Shan, with the aid of
GIS tools, mine subsidence regions and the magnitude of
subsidence has been extracted. In near future, the Permanent
Scatterers (PS) technique will be used to improve the accuracy
of InSAR and D-InSAR in monitoring the surface subsidence.
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(b) Differential interferogram
Only the urban areas and Guye district has high coherence (a),
in Guye district where mine was serious excavated; a cycle
Liu Guo-xiang, 2006. Monitoring of Ground Deformations
with Radar Interferometry. The Surveying and Mapping Press.
pp.9-10.
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Kampes, B., (1999) Delft Object-oriented Radar
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ACKNOWLEDGMENTS
The European Space Agency's (ESA) ERS-1, ERS-2 and
Envisat satellite(s) have been used to collect the interferometry
data. The data were obtained as a part of ESA Cat-1 Project
(No.4527). The interferometry processing in this project was
performed using the freely available Doris software, developed
by the Delft Institute for Earth-Oriented Space Research
(DEOS), Delft University of Technology.
(http://www.geo.tudelft.nl/doris.html).
Data integration is performed using ArcGIS supplied by
ESRI.
