IEEE Geoscience and Remote Sensing Magazine - March 2020 - 43

YANPING WANG, WEN HONG, YUAN ZHANG, YUN LIN, YANG LI,
ZECHAO BAI, QIMING ZHANG, SEN LV, HANG LIU, AND YANG SONG

G

©ISTOCKPHOTO.COM/PAOLO_TOFFANIN

round-based differential interferometry synthetic aperture radar
(GB-DInSAR) is a promising deformation measurement technology developed in the last 20 years. The GBDInSAR system is capable of sensing
millimeter-scale deformations in the
range of tens of meters to several kilometers from the target area in a continuous, all-weather environment. This
article introduces in detail the basic
principles of GB-DInSAR imaging, conventional signal models, deformationinversion algorithms, system working
mode, existing typical systems, and
application examples of high-precision
deformation measurement in different
scenarios. Moreover, this article systematically summarizes the latest research
progress of GB-DInSAR technology and
its future direction of development.
BENEFITS OF SAR
SAR is an active radar remote sensing
technology widely used for high-resolution imaging of the Earth. It achieves
azimuth and range resolution using
synthetic aperture principles and pulsecompression technology, respectively.
The SAR image carries the phase of the
target, which indicates the range information from the target to the radar. GBDInSAR technology uses phases of the
SAR images to realize the noncontact
deformation inversion with submillimeter precision. Specifically, the GBDInSAR system platform is statically
placed on the ground, where the relative

Ground-Based Differential
Interferometry SAR
A Review
Digital Object Identifier 10.1109/MGRS.2019.2963169
Date of current version: 29 January 2020

MARCH 2020

IEEE GEOSCIENCE AND REMOTE SENSING MAGAZINE

	

0274-6638/20©2020IEEE

43



http://www.ISTOCKPHOTO.COM/PAOLO_TOFFANIN

IEEE Geoscience and Remote Sensing Magazine - March 2020

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