Phenological Characteristics of Cultivated Vegetation Covers in JERS-1 and ERS-1 Synthetic Aperture Radar Data : Preliminary Results 

作成者 Rosenqvist, Ake, Oguma, Hiroyuki
日本十進分類法 (NDC) 450
内容 研究概要:JERS-1 and ERS-1 SAR data have been used to investigate the usefulness of space borne synthetic aperture radar for monitoring of three different vegetation types and their subsequent growing stages. One study area is located on Peninsular Malaysia, where rice paddy, rubber and oil palm are the dominating crop types, and the other in Niigata, Japan, where rice paddy is being studied. Results show a clear (positive) correlation between the L-band backscatter and the different growing stages for all three vegetation types. For rubber and oil palm the correlation is most pronounced during their early growing stages after which the signals become saturated before the plants reach their fully grown stages. For paddy, the backscattered signal appears to be sensitive even for fully grown plants. The behavior of paddy in SAR data is however different when comparing the paddy sites in Malaysia and in Japan. This is a result of different geometrical properties of the paddy fields, which, in turn, are due to special growing practices in the both countries. For rice fields in Japan, preliminary results show a significant difference in backscatter response dependent on the planting direction of the rice. This feature is not apparent for rice paddy in Malaysia. C-band backscatter proved virtually insensitive for detecting different growing stages for rubber trees, but, surprisingly enough, showed a clear correlation for oil palms. This effect is due to the different architecture of the two tree types. Due to lack of multi-temporal ERS-1 data, rice paddy has not been investigated for C-band.
コンテンツの種類 研究報告書 Research Paper
DCMI資源タイプ text
掲載誌情報 Proceedings of the international symposium on Vegetation Monitoring page.194-198 (1995)
言語 英語

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