Subsidence monitoring using SAR interferometry: Reduction of the atmospheric effects using stochastic filtering

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 p...

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Bibliographic Details
Published in:Geophysical research letters 2002-05, Vol.29 (9), p.26-1-26-4
Main Authors: Crosetto, Michele, Tscherning, Carl Christian, Crippa, Bruno, Castillo, Manuel
Format: Article
Language:English
Subjects:
Atmospheric effects
Filtering
Filtration
Interferometry
Monitoring
Monitors
Subsidence
Synthetic aperture radar
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Summary: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.
ISSN:0094-8276
1944-8007
DOI:10.1029/2001GL013544