DETECTION ACCURACY OF WATERLOGGED PADDY FIELDS USING WIDE FINE MODE OF RADARSAT-2

摘要

RADARSAT-2 starts Wide Fine mode observation in 2011. Wide Fine mode of RADARSAT-2 can observe 150km by 170km with highly spatial resolution (spatial resolution 15.2-8.2m by 7.7m). Moreover this mode has high cost performance; cost per area is about one fifth of Fine mode. I tried to detect waterlogged paddy fields using the Wide Fine observation mode, and evaluate accuracy. As a result lowest detection overall accuracy was 68.2% in Fukushima prefecture. Against highest detection accuracy was 80.4% in Ibaraki prefecture. Detection accuracy of Wide Fine mode is somewhat lower than Fine mode. It is a natural result. However, in 2011, transplanting activity was unusual because influence of huge earthquake, tsunami and Fukushima Daiichi nuclear disaster. Therefore this lower accuracy influenced not only spatial resolution but also these disasters. It is consider that Wide Fine mode of RADARSAT-2 is useful for detection of waterlogged paddy fields.