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2 October 2008 Rice crop monitoring using X, C and L band SAR data
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Rice crop is one of the most important agricultural products in Asia. It is necessary to monitor rice in wide area for the food control and the adjustment of food. This study focuses on the validation for monitoring of rice crop growth and extraction of rice-planted area using the German TerraSAR-X (X-band), ENVISAT-1/ASAR (C-band) and ALOS/PALSAR (L-band). TerraSAR-X is an advanced satellite which is able to observe 1m resolution with single polarization (HH or VV) or 2m resolution with dual polarization (HH/VV) in SpotLight mode. Also ASAR and PALSAR have single and dual polarization mode. Multi-temporal SAR data of each satellite are processed and analyzed to investigate temporal change of SAR backscattering coefficient of rice-planted area during the rice growing cycle with different wavelength, polarization and resolution in the test site of Hiroshima, Japan. Ground truth data are measured simultaneously with satellite observation such as height of plant, vegetation cover and Leaf Area Index (LAI) corresponding to SAR observation, and also the correlation between SAR backscattering coefficient and those parameters of rice crop growing were analyzed. SAR backscatter shows the significant change in early stage of rice growing cycle. Therefore, rice-planted area extraction is conducted with multi-temporal SAR data based on a classification technique using maximum likelihood method (MLC). In conclusion, rice crop growth and rice-planted area extraction can be successfully monitored using multi-temporal and multi-wavelength SAR data.
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Yuzo Suga and Tomohisa Konishi "Rice crop monitoring using X, C and L band SAR data", Proc. SPIE 7104, Remote Sensing for Agriculture, Ecosystems, and Hydrology X, 710410 (2 October 2008);

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