Integrated Ground-Based SAR Interferometry, Terrestrial Laser Scanner, and Corner Reflector Deformation Experiments

Zheng, Xiangtian; Yang, Xiaolin; Ma, Haitao; Ren, Guiwen; Zhang, Keli; Yang, Feng; Li, Ce

doi:10.3390/s18124401

Open AccessArticle

Integrated Ground-Based SAR Interferometry, Terrestrial Laser Scanner, and Corner Reflector Deformation Experiments

by

Xiangtian Zheng

^1,2,

Xiaolin Yang

^2,*,

Haitao Ma

²,

Guiwen Ren

²,

Keli Zhang

¹,

Feng Yang

¹ and

Ce Li

¹

School of Mechanical Electronic & Information Engineering, China University of Mining and Technology (Beijing), No. Ding-11, College Road, Haidian District, Beijing 100083, China

²

China Academy of Safety Science and Technology, No. 32, Beiyuan Road, Chaoyang District, Beijing 100012, China

^*

Author to whom correspondence should be addressed.

Sensors 2018, 18(12), 4401; https://doi.org/10.3390/s18124401

Submission received: 15 October 2018 / Revised: 19 November 2018 / Accepted: 5 December 2018 / Published: 12 December 2018

(This article belongs to the Section Remote Sensors)

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Abstract

An integrated sensor system comprised of a terrestrial laser scanner (TLS), corner reflectors (CRs), and high precision linear rail is utilized to validate ground-based synthetic aperture radar (GB-SAR) interferometric micro-displacement measurements. A rail with positioning accuracy of 0.1 mm is deployed to ensure accurate and controllable deformation. The rail is equipped with a CR on a sliding platform for mobility. Three smaller CRs are installed nearby, each with a reflective sticker attached to the CR’s vertex; the CRs present as high-amplitude points both in the GB-SAR images and the TLS point cloud to allow for accurate data matching. We analyze the GB-SAR zero-baseline repeated rail differential interferometry signal model to obtain 2D interferograms of the test site in time series, and then use TLS to obtain a 3D surface model. The model is matched with interferograms to produce more intuitive 3D products. The CR displacements can also be extracted via surface reconstruction algorithm. Finally, we compared the rail sensor measurement and TLS results to optimize coherent scatterer selection and filter the data. The proposed method yields accurate target displacement results via quantitative analysis of GB-SAR interferometry.

Keywords: ground-based synthetic radar (GB-SAR); terrestrial laser scanner (TLS); corner reflector (CR), deformation experiment; geometric mapping

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MDPI and ACS Style

Zheng, X.; Yang, X.; Ma, H.; Ren, G.; Zhang, K.; Yang, F.; Li, C. Integrated Ground-Based SAR Interferometry, Terrestrial Laser Scanner, and Corner Reflector Deformation Experiments. Sensors 2018, 18, 4401. https://doi.org/10.3390/s18124401

AMA Style

Zheng X, Yang X, Ma H, Ren G, Zhang K, Yang F, Li C. Integrated Ground-Based SAR Interferometry, Terrestrial Laser Scanner, and Corner Reflector Deformation Experiments. Sensors. 2018; 18(12):4401. https://doi.org/10.3390/s18124401

Chicago/Turabian Style

Zheng, Xiangtian, Xiaolin Yang, Haitao Ma, Guiwen Ren, Keli Zhang, Feng Yang, and Ce Li. 2018. "Integrated Ground-Based SAR Interferometry, Terrestrial Laser Scanner, and Corner Reflector Deformation Experiments" Sensors 18, no. 12: 4401. https://doi.org/10.3390/s18124401

APA Style

Zheng, X., Yang, X., Ma, H., Ren, G., Zhang, K., Yang, F., & Li, C. (2018). Integrated Ground-Based SAR Interferometry, Terrestrial Laser Scanner, and Corner Reflector Deformation Experiments. Sensors, 18(12), 4401. https://doi.org/10.3390/s18124401

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Integrated Ground-Based SAR Interferometry, Terrestrial Laser Scanner, and Corner Reflector Deformation Experiments

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