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High‐resolution 3D displacement field and stories behind: Studies in earthquake, volcano and underground nuclear test
Author(s) -
Wang Teng
Publication year - 2019
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/1755-6724.14009
Subject(s) - observatory , volcano , beijing , geology , seismology , history , computer science , library science , physics , china , astrophysics , archaeology
Synthetic aperture radar (SAR) imagery is a powerful remote sensing technology that allows for mapping the surface displacement with the resolution of a few meters. Although Interferometric SAR (InSAR) has been widely used in earth science studies, applications often suffer from decorrelation in the area of large displacement gradients, causing a data gap near the ruptured crust. Pixel offsets between SAR amplitude images can provide unambiguous ground displacement measurements in both the radar line-of-sight (range) direction and the along-track (azimuth) flight direction, allowing for deriving complete (3D) displacement in the near field. Here we will present how SAR amplitude images can help us to better understand geodynamic processes via three independent cases: