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Proceedings Paper

Effective monitoring for marine debris after the Great East Japan Earthquake by using spaceborne synthetic aperture radar
Author(s): Motofumi Arii; Yoshifumi Aoki; Masakazu Koiwa
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Paper Abstract

The Great East Japan Earthquake occurred at March 11, 2011 and caused massive tidal wave. The tsunami swept away a large quantity of rubble and vessels to the sea and they become so-called marine debris. To assess damage situation and protect marine environment, it is essentially required to investigate the status of those marine debris. The technique based on spaceborne synthetic aperture radar (SAR) can be a strong candidate to achieve this ultimate goal, because of its wide observation area and higher resolution with flexible operability: regardless of the day and night and regardless of the weather. We have monitored marine debris on huge amount of spaceborne SAR imagery right after the great disaster and investigated an effective observation of marine debris to predict future direction. In this paper, we firstly define three types of debris as large debris, small debris, and cluster by considering how marine debris looks like on the SAR imagery. Then, an automatic but accurate detection and classification of a large amount of debris on SAR imagery is proposed. Based on those results, resolution and swath width for efficient marine debris monitoring are obtained. Velocity of marine debris is additionally estimated from multi-temporal SAR images to derive optimum swath width.

Paper Details

Date Published: 21 November 2012
PDF: 9 pages
Proc. SPIE 8525, Remote Sensing of the Marine Environment II, 852503 (21 November 2012); doi: 10.1117/12.975938
Show Author Affiliations
Motofumi Arii, Mitsubishi Space Software Co., Ltd. (Japan)
Yoshifumi Aoki, Mitsubishi Space Software Co., Ltd. (Japan)
Masakazu Koiwa, Mitsubishi Space Software Co., Ltd. (Japan)

Published in SPIE Proceedings Vol. 8525:
Remote Sensing of the Marine Environment II
Robert J. Frouin; Naoto Ebuchi; Delu Pan; Toshiro Saino, Editor(s)

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