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Mapping Paddy Rice Varieties Using Multi-temporal RADARSAT SAR Images
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  • Mapping Paddy Rice Varieties Using Multi-temporal RADARSAT SAR Images
  • Mapping Paddy Rice Varieties Using Multi-temporal RADARSAT SAR Images
저자명
Jang. Min-Won,Kim. Yi-Hyun,Park. No-Wook,Hong. Suk-Young
간행물명
大韓遠隔探査學會誌
권/호정보
2012년|28권 6호|pp.653-660 (8 pages)
발행정보
대한원격탐사학회
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
서지반출

기타언어초록

This study classified paddy fields according to rice varieties and monitored temporal changes in rice growth using SAR backscatter coefficients (${sigma}^{circ}$). A growing period time-series of backscatter coefficients was set up for nine fine-beam mode RADARSAT-1 SAR images from April to October 2005. The images were compared with field-measured rice growth parameters such as leaf area index (LAI), plant height, fresh and dry biomass, and water content in grain and plants for 45 parcels in Dangjin-gun, Chungnam Province, South Korea. The average backscatter coefficients for early-maturing rice varieties (13 parcels) ranged from -18.17 dB to -6.06 dB and were lower than those for medium-late maturing rice varieties during most of the growing season. Both crops showed the highest backscatter coefficient values at the heading stage (late July) for early-maturing rice, and the difference was greatest before harvest for early-maturing rice. The temporal difference in backscatter coefficients between rice varieties may play a key role in identifying early-maturing rice fields. On the other hand, comparisons with field-measured parameters of rice growth showed that backscatter coefficients decreased or remained on a plateau after the heading stage, even though the growth of the rice canopy had advanced.