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Open AccessArticle

Differential Ground-Based Radar Interferometry for Slope and Civil Structures Monitoring: Two Case Studies of Landslide and Bridge

by Jiyuan Hu 1,2,3, Jiming Guo 1,*, Yi Xu 1, Lv Zhou 1, Shuai Zhang 1 and Kunfei Fan 4
1
School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China
2
Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, 14473 Potsdam, Germany
3
Guangxi Key Laboratory of Spatial Information and Geomatics, Guilin University of Technology, Guilin 541004, China
4
Nanning Natural Resources Information Center, Nanning 530022, China
*
Author to whom correspondence should be addressed.
Remote Sens. 2019, 11(24), 2887; https://doi.org/10.3390/rs11242887
Received: 17 October 2019 / Revised: 26 November 2019 / Accepted: 2 December 2019 / Published: 4 December 2019
Ground-based radar interferometry, which can be specifically classified as ground-based synthetic aperture radar (GB-SAR) and ground-based real aperture radar (GB-RAR), was applied to monitor the Liusha Peninsula landslide and Baishazhou Yangtze River Bridge. The GB-SAR technique enabled us to obtain the daily displacement evolution of the landslide, with a maximum cumulative displacement of 20 mm in the 13-day observation period. The virtual reality-based panoramic technology (VRP) was introduced to illustrate the displacement evolutions intuitively and facilitate the following web-based panoramic image browsing. We applied GB-RAR to extract the operational modes of the large bridge and compared them with the global positioning system (GPS) measurement. Through full-scale test and time-frequency result analysis from two totally different monitoring methods, this paper emphasized the 3-D display potentiality by combining the GB-SAR results with VRP, and focused on the detection of multi-order resonance frequencies, as well as the configure improvement of ground-based radars in bridge health monitoring. View Full-Text
Keywords: GB-SAR; GB-RAR; VRP; displacement evolution; operational modes GB-SAR; GB-RAR; VRP; displacement evolution; operational modes
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Hu, J.; Guo, J.; Xu, Y.; Zhou, L.; Zhang, S.; Fan, K. Differential Ground-Based Radar Interferometry for Slope and Civil Structures Monitoring: Two Case Studies of Landslide and Bridge. Remote Sens. 2019, 11, 2887.

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