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23 June 2017 Effect of external digital elevation model on monitoring of mine subsidence by two-pass differential interferometric synthetic aperture radar
Qiuxiang Tao, Tengfei Gao, Guolin Liu, Zhiwei Wang
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Journal of Applied Remote Sensing, Vol. 11, Issue 2, 026037 (June 2017). https://doi.org/10.1117/1.JRS.11.026037
Abstract
The external digital elevation model (DEM) error is one of the main factors that affect the accuracy of mine subsidence monitored by two-pass differential interferometric synthetic aperture radar (DInSAR), which has been widely used in monitoring mining-induced subsidence. The theoretical relationship between external DEM error and monitored deformation error is derived based on the principles of interferometric synthetic aperture radar (DInSAR) and two-pass DInSAR. Taking the Dongtan and Yangcun mine areas of Jining as test areas, the difference and accuracy of 1:50000, ASTER GDEM V2, and SRTM DEMs are compared and analyzed. Two interferometric pairs of Advanced Land Observing Satellite Phased Array L-band SAR covering the test areas are processed using two-pass DInSAR with three external DEMs to compare and analyze the effect of three external DEMs on monitored mine subsidence in high- and low-coherence subsidence regions. Moreover, the reliability and accuracy of the three DInSAR-monitored results are compared and verified with leveling-measured subsidence values. Results show that the effect of external DEM on mine subsidence monitored by two-pass DInSAR is not only related to radar look angle, perpendicular baseline, slant range, and external DEM error, but also to the ground resolution of DEM, the magnitude of subsidence, and the coherence of test areas.
CC BY: © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.
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Qiuxiang Tao, Tengfei Gao, Guolin Liu, and Zhiwei Wang "Effect of external digital elevation model on monitoring of mine subsidence by two-pass differential interferometric synthetic aperture radar," Journal of Applied Remote Sensing 11(2), 026037 (23 June 2017). https://doi.org/10.1117/1.JRS.11.026037
Received: 17 October 2016; Accepted: 6 June 2017; Published: 23 June 2017
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Cited by 14 scholarly publications.
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KEYWORDS
Mining
Interferometric synthetic aperture radar
Earth observing sensors
Interferometry
L band
Phased arrays
Radar
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