Two-Dimensional Deformation Measurement Based on Multiple Aperture Interferometry in GB-SAR

Ground-based synthetic aperture radar (GB-SAR) technique has been widely applied for the deformation monitoring and measurement of the natural and engineered slopes. To extend the 2-D deformation measurement from the conventional 1-D measurement along the radar-target line of sight (LOS), multiple aperture interferometry (MAI) techniques based on phase differences between interferograms of the forward-looking and backward-looking subapertures are tackled in this letter. The optimal subaperture selection is analyzed considering the typical signal-to-noise ratios and correlations in GB-SAR applications. Simulations prove that the coherent integration (CIM) can be utilized to improve the measurement accuracy of the MAI method. Besides, GB-SAR experiments are carried out to validate the feasibility and effectiveness of the 2-D deformation measurement method based on MAI. Accuracy comparison of deformation measurement with the MAI and cross correlation methods is also taken. Experimental results show that the accuracy of deformation measurement along the perpendicular direction to LOS based on MAI and CIM can reach millimeter level for displaceable corner reflector.

[1]  Fuk K. Li,et al.  Synthetic aperture radar interferometry , 2000, Proceedings of the IEEE.

[2]  M. Seymour,et al.  Maximum likelihood estimation for SAR interferometry , 1994, Proceedings of IGARSS '94 - 1994 IEEE International Geoscience and Remote Sensing Symposium.

[3]  Andreas Wiesmann,et al.  A review of terrestrial radar interferometry for measuring surface change in the geosciences , 2015 .

[4]  Peng Junhuan,et al.  Mapping Three-Dimensional Co-Seismic Deformations Fields by Combining Multiple-Aperture Interferometry and Differential Interferometric Synthetic Aperture Radar Techniques , 2016 .

[5]  R. Bamler,et al.  Interferometric stereo radargrammetry: absolute height determination from ERS-ENVISAT interferograms , 2000, IGARSS 2000. IEEE 2000 International Geoscience and Remote Sensing Symposium. Taking the Pulse of the Planet: The Role of Remote Sensing in Managing the Environment. Proceedings (Cat. No.00CH37120).

[6]  R. Bamler,et al.  Synthetic aperture radar interferometry , 1998 .

[7]  Joong-Sun Won,et al.  An Improvement of the Performance of Multiple-Aperture SAR Interferometry (MAI) , 2009, IEEE Transactions on Geoscience and Remote Sensing.

[8]  Núria Devanthéry,et al.  Ieee Geoscience and Remote Sensing Letters 1 a Noninterferometric Procedure for Deformation Measurement Using Gb-sar Imagery , 2022 .

[9]  Robert N. McDonough,et al.  Detection of signals in noise , 1971 .

[10]  M. G. Angeli,et al.  A critical review of landslide monitoring experiences , 2000 .

[11]  N. Bechor,et al.  Extending interferometric synthetic aperture radar measurements from one to two dimensions , 2006 .

[12]  Erik Eberhardt,et al.  Development and application of a pseudo-3D pit slope displacement map derived from ground-based radar , 2014 .

[13]  H. Zebker,et al.  Measuring two‐dimensional movements using a single InSAR pair , 2006 .

[14]  Jun-huan Peng,et al.  Mapping Three-Dimensional Co-Seismic Deformations Fields by Combining Multiple-Aperture Interferometry and Differential Interferometric Synthetic Aperture Radar Techniques , 2015, Journal of the Indian Society of Remote Sensing.