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Subsidence monitoring using SAR interferometry: Reduction of the atmospheric effects using stochastic filtering
Author(s) -
Crosetto Michele,
Tscherning Carl Christian,
Crippa Bruno,
Castillo Manuel
Publication year - 2002
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2001gl013544
Subject(s) - interferometry , subsidence , remote sensing , geology , geodesy , ground subsidence , interferometric synthetic aperture radar , scale (ratio) , geodetic datum , environmental science , synthetic aperture radar , geomorphology , geography , optics , cartography , geotechnical engineering , physics , structural basin
The atmospheric effects represent one of the major limits of SAR interferometry as a quantitative technique to monitor subsidences. In this work, which focuses on subsidences of small spatial extent, a procedure to reduce these effects is described. The atmospheric component of the interferometric phase is estimated adopting a filtering and prediction procedure, which exploits the phase over stable areas identified in the vicinity of the analysed subsidence area. The procedure was validated on a suitable test site located in North‐eastern Spain. Furthermore, it was employed in the study of a small‐scale subsidence, where the interferometric results were validated using precise geodetic observations.