On the Bragg Scattering Observed in L-Band Synthetic Aperture Radar Images of Flooded Rice Fields(Sensing)
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概要
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This article presents the analysis of the Bragg scattering phenomenon which has been observed in the images of machine-planted rice paddies acquired by the JERS-1 L-band synthetic aperture radar (SAR). The simultaneous measurements of rice plants were made at the SAR data acquisition times. Large differences of 20-25dB in image intensity between the transplanting and ripening stages are found to be dependent on the planting direction and bunch separation. This selective image enhancement is a result of the Bragg resonance backscatter due to the double-bounce of incident L-band microwave between the flooded water surface and periodically planted bunches of rice plants. Support for the idea of double-bounce scattering is provided by the decomposition analysis of L-band and X-band polarimetric Pi-SAR data; and a simple numerical simulation based on the physical optics model shows fairly good agreement with the JERS-1 SAR data. The results presented in this paper is mainly of academic interest, but a suggestion can be made on the selection of suitable microwave band for monitoring rice fields.
- 社団法人電子情報通信学会の論文
- 2006-08-01
著者
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Ouchi Kazuo
Kochi University Of Technology
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Ouchi Kazuo
National Defense Acad. Yokosuka‐shi Jpn
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WANG Haipeng
Kochi University of Technology
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OUCHI Kazuo
Faculty of Engineering, Kochi University of Technology
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WANG Haipeng
Faculty of Engineering, Kochi University of Technology
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ISHITSUKA Naoki
Department of Global Resources, National Institute for Agro-Environmental Sciences
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SAITO Genya
Field Science Center, Graduate School of Agricultural Science, Tohoku University
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MOHRI Kentaro
Faculty of Agriculture, Okayama University
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ISHITSUKA Naoki
NIAES
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MOHRI Kentaro
Okayama Univ.
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Ouchi Kazuo
Department Of Information Science National Defense Academy
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Wang Haipeng
Fudan Univ. Shanghai Chn
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Mohri Kentaro
Faculty Of Agriculture Okayama University
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