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Simultaneous Observation Data of GB-SAR/PiSAR to Detect Flooding in an Urban Area


We analyzed simultaneous observation data with ground-based synthetic aperture radar (GB-SAR) and airborne SAR (PiSAR) over a flood test site at which a simple house was constructed in a field. The PiSAR under flood condition was 0.9 to 3.4 dB higher than that under nonflood condition. GB-SAR gives high spatial resolution as we could identify a single scattering component and a double bounce component from the house. GB-SAR showed that the difference between the flooding and nonflooding conditions came from the double bounce scattering. We also confirm that the entropy is a sensitive parameter in the eigenvalue decomposition parameters, if the scattering process is dominated by the double bounce scattering. We conclude that and entropy are a good parameter to be used to detect flooding, not only in agricultural and forest regions, but also in urban areas. We also conclude that GB-SAR is a powerful tool to supplement satellite and airborne observation, which has a relatively low spatial resolution.

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Correspondence to Manabu Watanabe.

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Watanabe, M., Matsumoto, M., Shimada, M. et al. Simultaneous Observation Data of GB-SAR/PiSAR to Detect Flooding in an Urban Area. EURASIP J. Adv. Signal Process. 2010, 560512 (2009).

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