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Analysis of urban areas affected by the 2011 off the Pacific coast of Tohoku earthquake and tsunami with L-Band SAR full-polarimetric mode
https://nied-repo.bosai.go.jp/records/6107
https://nied-repo.bosai.go.jp/records/6107efcd4e01-bf51-426f-acbd-7af0c6d88d28
| Item type | researchmap(1) | |||||||||||||||
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| 公開日 | 2023-04-27 | |||||||||||||||
| タイトル | ||||||||||||||||
| 言語 | en | |||||||||||||||
| タイトル | Analysis of urban areas affected by the 2011 off the Pacific coast of Tohoku earthquake and tsunami with L-Band SAR full-polarimetric mode | |||||||||||||||
| 言語 | ||||||||||||||||
| 言語 | eng | |||||||||||||||
| 著者 |
Manabu Watanabe
× Manabu Watanabe
× Takeshi Motohka
× Yousuke Miyagi
× Chinatsu Yonezawa
× Masanobu Shimada
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| 抄録 | ||||||||||||||||
| 内容記述タイプ | Other | |||||||||||||||
| 内容記述 | The 2011 off the Pacific coast of Tohoku earthquake was observed using phased array type L-band synthetic aperture radar (PALSAR) and polarimetric and interferometric airborne synthetic aperture radar (PiSAR) full-polarimetric data. Representative polarimetric parameters were calculated from full-polarimetric data for urban areas, where most of the buildings were destroyed by the subsequent tsunami, in order to identify the radar scattering mechanism in these areas. These parameters were compared with the ones observed before the disaster. The full-polarimetric data analysis shows that the affected areas were represented by surface scattering with high entropy, indicating that a complex scattering mechanism with nonreflection symmetry is involved. The coherence between HH and VV and that between RR and LL are the most important factors in distinguishing the disaster areas from the data. Alpha angle and anisotropy are also important factors in this respect however, anisotropy derived from PiSAR data does not show the difference between areas with collapsed and still-standing buildings. This may be because the azimuth slope angle for the target urban area is different before and after the disaster for both PALSAR and PiSAR data. Owing to the double-bounce scattering from azimuthally rotated targets in the urban areas, the power estimated from the four-component decomposition model is distributed within a wide range not only for double-bounce scattering but also for volume and surface scatterings. Additionally, the model does not show a systematic change between before and after the disaster, and σ 0 for four polarizations with 30-m resolution does not show a systematic difference. © 2012 IEEE. |
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| 言語 | en | |||||||||||||||
| 書誌情報 |
en : IEEE Geoscience and Remote Sensing Letters 巻 9, 号 3, p. 472-476, 発行日 2012 |
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| 収録物識別子タイプ | ISSN | |||||||||||||||
| 収録物識別子 | 1545-598X | |||||||||||||||
| DOI | ||||||||||||||||
| 関連識別子 | 10.1109/LGRS.2011.2182030 | |||||||||||||||
