Nonlinear subsidence rate estimation using permanent scatterers in differential SAR interferometry

Discrete and temporarily stable natural reflectors or permanent scatterers (PS) can be identified from long temporal series of interferometric SAR images even with baselines larger than the so-called critical baseline. This subset of image pixels can be exploited successfully for high accuracy diffe...

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Bibliographic Details
Published in:IEEE transactions on geoscience and remote sensing 2000-09, Vol.38 (5), p.2202-2212
Main Authors: Ferretti, A., Prati, C., Rocca, F.
Format: Article
Language:English
Subjects:
Applied geophysics
Atmospheric measurements
Digital elevation models
Displacement
Earth sciences
Earth, ocean, space
Exact sciences and technology
Extraterrestrial measurements
Interferometry
Internal geophysics
Motion analysis
Motion estimation
Nonlinearity
Phase estimation
Phase measurement
Polystyrene resins
Radar scattering
Reflectors
Subsidence
Synthetic aperture radar
Temporal logic
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Summary:Discrete and temporarily stable natural reflectors or permanent scatterers (PS) can be identified from long temporal series of interferometric SAR images even with baselines larger than the so-called critical baseline. This subset of image pixels can be exploited successfully for high accuracy differential measurements. The authors discuss the use of PS in urban areas, like Pomona, CA, showing subsidence and absidence effects. A new approach to the estimation of the atmospheric phase contributions, and the local displacement field is proposed based on simple statistical assumptions. New solutions are presented in order to cope with nonlinear motion of the targets.
ISSN:0196-2892
1558-0644
DOI:10.1109/36.868878