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http://dx.doi.org/10.7780/kjrs.2010.26.2.123

Detection of Artificial Displacement of a Reflector by using GB-SAR Interferometry and Atmospheric Humidity Correction  

Lee, Jae-Hee (Department of Geophysics, Kangwon National University)
Lee, Hoon-Yol (Department of Geophysics, Kangwon National University)
Cho, Seong-Jun (Mineral Resources Research Division, Korea Institute of Geoscience and Mineral Resources)
Sung, Nak-Hun (Mineral Resources Research Division, Korea Institute of Geoscience and Mineral Resources)
Kim, Jung-Ho (Mineral Resources Research Division, Korea Institute of Geoscience and Mineral Resources)
Publication Information
Korean Journal of Remote Sensing / v.26, no.2, 2010 , pp. 123-131 More about this Journal
Abstract
In this paper we applied Ground-Based Synthetic Aperture Radar(GB-SAR) interferometry to detect artificial displacement of a reflector and performed an atmospheric humidity correction to improve the accuracy. A series of GB-SAR images were obtained using a center frequency of 5.3 GHz with a range resolution of 25 cm and a azimuth resolution of $0.324^{\circ}$, all in full-polarization (HH, VV, VH, HV) modes. A triangular trihedral corner reflector was located 160 m away from the system, and the artificial displacements of 0-40 mm was implemented during the GB-SAR image acquisition. The result showed that the RMS error between the actual and measured displacements, averaged in all polarization data, was 1.22 mm, while the maximum error in case of the 40 mm displacement was 2.72 mm at HH-polarization. After the atmospheric correction with respect to the humidity, the RMS error was reduced to 0.52 mm. We conclude that a GB-SAR system can be used to monitor the possible displacement of artificial/natural scatterers and the stability assessment with sub-millimeter accuracy.
Keywords
GB-SAR; interferometry; displacement; atmospheric humidity correction;
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Times Cited By KSCI : 3  (Citation Analysis)
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