| Synthetic Aperture Radar (SAR) can observe the earth surface in any weather conditions. SAR sensor observes the roughness on the ground surface mainly. The planting conditions in paddy fields are detected by backscattering difference of SAR data. These images below show the planting condition of the paddy fields in Higashi-Hiroshima City using ERS-1 and RADARSAT. (Processed : HIT, ERS-1/SAR image : (C)ESA/ERS1993, RADARSAT image :NASDA/(C)CSA/RSI1999)
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| Paddy fields detection by ERS-1/SAR in 1993 |
Composite of ERS-1/SAR images between before and after planting. |
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| Paddy fields detection by RADARSAT/SAR in 1999 |