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Proceedings Paper

Can ALOS-3/HISUI detect seaweed beds more precisely than ALOS/AVNIR-2?
Author(s): Tatsuyuki Sagawa; Tomohiro Watanabe; Akira Watanuki; Tetsu Koike; Haruchika Kamimura; Teruhisa Komatsu
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Paper Abstract

Hyperspectral Imager Suite (HISUI) is a Japanese future spaceborne hyperspectral sensor system. It will be launched in 2015 or later as one of mission instruments onboard JAXA's Advanced Land Observation Satellite 3 (ALOS-3). HISUI will consist of a hyperspectral imager and a multispectral imager with 30 m and 5 m spatial resolution and 30 km and 90 km swath, respectively. In order to characterize capability to detect seaweed beds of HISUI multispectral data with 5 m spatial resoution, we comprared classification results between ALOS/AVNIR-2 with spatial resolution of 10 m and simulation data of HISUI produced from WorldView-2. Study site was seletced in Oita Prefecture in Kyushu Island, Japan, where seaweed beds were broadly distributed along the coast. We used AVNIR-2 data taken on 20 February 2007 and simulation data produced from WorldView-2 taken on 18 April 2010. Supervised and unsupervised classifications were applied to these data sets. Miss-classification of analysis using AVNIR-2 was identified in deep waters in offshore waters. Since radiometric resolution of AVNIR-2 is 8 bits, it is considered that low radiometric resolution causes missclassification. Spatial resolution of HISUI multiband data with 5 m permits to detect seaweed beds clearer. Precision of classification using HISUI simulation data was about 90% and 10% higher than that using AVNIR-2. Thus HISUI multiband data are suitable for mapping seaweed beds in coastal waters.

Paper Details

Date Published: 11 December 2012
PDF: 9 pages
Proc. SPIE 8525, Remote Sensing of the Marine Environment II, 85250Y (11 December 2012); doi: 10.1117/12.999309
Show Author Affiliations
Tatsuyuki Sagawa, Remote Sensing Technology Ctr. of Japan (Japan)
Tomohiro Watanabe, Remote Sensing Technology Ctr. of Japan (Japan)
Akira Watanuki, Alpha Hydraulic Engineering Consultants Co., Ltd. (Japan)
Tetsu Koike, Alpha Hydraulic Engineering Consultants Co., Ltd. (Japan)
Haruchika Kamimura, Japan Aerospace Exploration Agency (Japan)
Teruhisa Komatsu, The Univ. of Tokyo (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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