期刊
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
卷 60, 期 -, 页码 -出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TGRS.2021.3055648
关键词
Synthetic aperture radar; Strain; Refractive index; Monitoring; Instruments; Indexes; Decorrelation; Atmospheric phase screen (APS); ground-based systems; synthetic aperture radar (SAR); SAR interferometry
类别
资金
- National Operational Programme for Research and Competitiveness 2007-2013 through the Infrastructure of High Technology for Environmental and Climate Monitoring [PONa3_00363]
- Italian Ministry of Education, University and Research [D.D. 2261]
This work proposes a method for estimating and compensating the atmospheric phase screen in ground-based synthetic aperture radar (GB-SAR) interferograms, and its validity is confirmed through experiments, especially in areas with medium-to-high topographic slopes.
This work proposes a method for estimating and compensating the atmospheric phase screen (APS) in sets of synthetic aperture radar (SAR) interferograms generated with a ground-based SAR (GB-SAR) instrument. We address the presented approachx2019;s physical, statistical, and mathematical framework by discussing its potential and limitations. In contrast with other existing algorithms that estimate the APS from the unwrapped phase signals, our methodology is based on the straightforward analysis of the wrapped phases, directly. Therefore, the method is not affected by any potential phase unwrapping mistake, and it is suitable for multitemporal interferometric SAR (InSAR) applications. The effects of the local topography, the decorrelation noise, and the ground deformation on the APS estimates are deeply studied. Experiments performed on simulated and real GB-SAR InSAR data corroborate the validity of the theory. In particular, the simulated results show that the method is beneficial in zones with medium-to-high topographic slopes (e.g., for Alpine and mountainous regions).
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