Can ALOS-3/HISUI detect seaweed beds more precisely than ALOS/AVNIR-2?

Tatsuyuki Sagawa; Tomohiro Watanabe; Akira Watanuki; Tetsu Koike; Haruchika Kamimura; Teruhisa Komatsu

doi:10.1117/12.999309

11 December 2012 Can ALOS-3/HISUI detect seaweed beds more precisely than ALOS/AVNIR-2?

Tatsuyuki Sagawa, Tomohiro Watanabe, Akira Watanuki, Tetsu Koike, Haruchika Kamimura, Teruhisa Komatsu

Proceedings Volume 8525, Remote Sensing of the Marine Environment II; 85250Y (2012) https://doi.org/10.1117/12.999309
Event: SPIE Asia-Pacific Remote Sensing, 2012, Kyoto, Japan

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.

Citation Download Citation

Tatsuyuki Sagawa, Tomohiro Watanabe, Akira Watanuki, Tetsu Koike, Haruchika Kamimura, and Teruhisa Komatsu "Can ALOS-3/HISUI detect seaweed beds more precisely than ALOS/AVNIR-2?", Proc. SPIE 8525, Remote Sensing of the Marine Environment II, 85250Y (11 December 2012); https://doi.org/10.1117/12.999309

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