InSAR for
Crustal Deformations
Summary
of Activities
Interferometric
Synthetic Aperture Radar (InSAR) is a satellite based radar remote sensing
technology that is capable to measure fine ground deformations (typically
at the level of millimeters to centimeters) with very high spatial resolution
(20-30 meters) and ground coverage.
The research in this area develops new methods for
processing Synthetic Aperture Radar (SAR) data, studies and enhances the
quality InSAR results, and applies the technology to study ground deformations
associated with earthquake or engineering activities.
The research group collaborates closely with a number
of international research groups and has carried out consultancy projects
in both Hong Kong and other countries.
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An
illustration of InSAR technology (image courtesy of JPL, NASA)
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SAR
interferometry showing co-seismic deformations associated
with the Chi-Chi earthquake of 1999 in Taiwan
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A
SAR amplitude image of Hong Kong and part of the neighboring
Shenzhen City, China Mainland
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The
atmospheric effects at two regions in Hong Kong
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Land
settlement of part of Hong Kong over a time period of nearly
3 years as observed with InSAR technology
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Representative
Projects
- Regional
Deformation Monitoring Using SAR Interferometry
- Enhanced
InSAR Technology for Monitoring Earth Surface Deformation
- Study
of Ground Subsidence in HK Based on InSAR Technology and Advanced
Numerical Method
- Atmospheric
Effects in Interferometric Synthetic Aperture Radar (InSAR) Measurements
in HK and Southern China
Major Facilities
- Software
for SAR image processing.
Selected
Research Output
- Liu,
G.X., Ding, X.L., Zheng, D.W., Li, Z.L. and Chen, Y.Q. (2000) A Potential
Technology for Spatial Observation of the Earth: Synthetic Aperture
Radar Interferometry, Advance in Earth Sciences, Vol. 15, No. 6, pp.
734-740. (in Chinese).
- Chen,
Y.Q., Zhang, G.B., Ding, X.L. and Li, Z.L. (2000) Monitoring Earth
Surface Deformations with InSAR Technology, J. of Geospatial Engineering,
Vol. 2, No. 1, pp. 3-21.
- Ding,
X.L., Chen, Y.Q., Li, Z.L., Liu, G.X. and Zhang, G.B. (2000) Synthetic
Aperture Radar Interferometry and Its Applications in Earth Deformation
Measurements, Publications of Purple Mountain Observatory, Vol. 19,
No. 2, pp. 158-167. (in Chinese).
- Zhu,
J.J., Ding, X.L. and Chen, Y.Q. (2000) Maximum likelihood ambiguity
resolution based on Bayesian principle, J. of Geodesy, Vol. 75, No.
4, pp. 175-187.
- Liu,
G.X., Ding, X.L., Li, Z.L., Chen, Y.Q., Liu, W.X. and Li, Z.W. (2000)
Assessment of the Quality of InSAR DEM, Remote Sensing Information,
Vol. 60, No. 4, pp. 7-10. (in Chinese)
- Liu,
G.X., Ding, X.L., Li, Z.L., Chen, Y.Q. and Zhang, G.B. (2001) Co-registration
of satellite SAR complex images, Acata Geodaetica et Cartographica
Sinica, Vol. 30, No. 1, pp. 60-66. (in Chinese)
- Liu,
G.X., Ding, X.L., Chen, Y.Q., Li, Z.L. and Li, Z.W. (2001) Monitoring
land subsidence at the Chek Lap Kok Airport Using InSAR Technology,
Chinese Science Bulletin. Vol. 46, No. 14, pp. 1224-1228.
- Liu,
G.X., Ding, X.L., Chen, Y.Q., Li, Z.L. and Li, Z.W. (2001) Monitoring
land subsidence at the Chek Lap Kok Airport Using InSAR Technology,
Chinese Science Bulletin. Vol. 46, No. 21, pp. 1778-1782. (English
Ed.)
- Liu,
G.X, Ding, X.L., Chen, Y.Q. Li, Z.L., Li, Z.W. (2002) The Pre- and
Co-Seismic Ground Displacements of the 1999 Chi-Chi Earthquake from
ERS-SAR Interferometry, Chinese Journal of Geophysics (in press).
- Liu,
G..X., Ding, X.L., Li, Z.L., Chen, Y.Q., Li, Z.W. Experimental Investigation
on DEM Generation through InSAR, ACTA Geodaetica et Cartographica
Sinica (in press).
- Zou,
W.B., Ren, S.C., Li, Z.L., Ding, X.L., Chen, Y.Q. (2001) Application
of SAR in airborne combined navigation systems, Remote Sensing Information,
Vol. 2001.3, pp. 11-18. (in Chinese)
Contact
Information of the Contact Person
Dr.
Xiaoli Ding, Associate Professor
Department of Land Surveying and Geo-Informatics
The Hong Kong Polytechnic University
Telephone: +852 2766 5965
Fax: +852 2330 2994
Email: lsxlding@polyu.edu.hk
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