Journal of the Korean Association of Geographic Information Studies (한국지리정보학회지)
- Volume 3 Issue 3
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- Pages.12-19
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- 2000
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- 1226-9719(pISSN)
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- 2287-6952(eISSN)
Analysis of Spectral Reflectance Characteristic Change during Growing Status of Rice Plants using Spectroradiometer
스펙트로레디오메터를 이용한 벼 생장시기의 분광반사 특성 변화 분석
- Jang, Se-Jin (Remote Sensing Lab. Meteorology Research Institute, METRI-KMA) ;
- Suh, Ae-Sook (Remote Sensing Lab. Meteorology Research Institute, METRI-KMA) ;
- Kim, Pan-Gi (National Instrumentation Center for Environmental Management, College of Agriculture and Life Sciences, Seoul National University) ;
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Yun, Jin-Il
(Department if Agronomy/Institute of Life Science and Natural Resource, Kyunghee University)
- 장세진 (기상청 기상연구소 원격탐사연구실) ;
- 서애숙 (기상청 기상연구소 원격탐사연구실) ;
- 김판기 (서울대학교 농업과학공동기기센타) ;
-
윤진일
(경희대학교 생명자원과학연구원/농학과)
- Received : 2000.09.08
- Published : 2000.11.30
Abstract
Knowledge for reflectance characteristic of interesting targets will provide us with actual application of remote sensing on agriculture. In this study, we have measured and analyzed reflectivity characteristics based on growing status from transplanting time to harvesting time. Rice paddies transplant into 3 fields at 20, May, 1999. Measurement of reflectivity characteristics were carried out with a portable spectroradiometer for frequencies from 300nm to 1100nm during the time period from 11:00 AM to 01:00 PM of clear sky and calm a day. The measurements for a day repeated 3 times(also, 3 times to each measurement)for reliable values. In result, we found that averaged reflectivity of visible range has about 2.34% - 2.55% in blue region(400nm-498nm), about 5.05% - 6.01% in green region(500nm-598nm) and about 4.21% - 5.24% in red region(600nm-698nm). It must be noted that the more rice canopy grows, the more spectral reflectivity decreases in visible region. Also, we separated infrared region into two cases - One case is increasing region with 700nm-780nm, the other is fixed region with 800nm-1100nm. Averaged reflectivity of these regions has about 22.3% - 23.0% in increasing region, about 29.4% - 33.1% in fixed region. It must be noted that more rice canopy grows, the more spectral reflectivity also increases up to 23, Aug. in infrared region. After 23, Aug, the reflectivity has a tendency toward decrease.
관심있는 농작물의 반사 특성에 대한 지식은 우리에게 농업 분야에서의 원격탐사 활용에 대한 가능성을 제공한다. 본 연구에서는 일품벼의 이앙기에서 수확기까지의 성장 단계에 따른 반사 특성을 측정 및 분석하였다. 벼는 1999년 5월 20일에 경기도 수원시 서둔동 수원기상대(