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마이크로파 산란계와 유전 알고리즘을 이용한 호수 얼음의 물성 모델링 Modeling of physical properties of lake ice by using microwave scatterometer and genetic algorithm. 강원대학교 지구물리학과 원격탐사연구실 한향선 , 이훈열. 발표 순서. 서론 얼음에서의 후방산란 현장 실험 및 결과 마이크로파 산란 모델링 및 결과 결론. 서론. 연구배경 하천 / 호수 얼음의 물리적 특성 - PowerPoint PPT Presentation
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Modeling of physical properties of lake ice by using microwave scatterometer and genetic algorithm
,
/
(Microwave Scatterometer) , , /
/ , , air bubble
air bubble ,
/ volume inhomogeneity
Microwave ScatterometerHH Polarization Square Horn AntennaCenter frequency: 5.3 GHz (C-band)Band width: 600 MHzSpatial resolution: 25 cmnotebookVNAGPIB-USBice surfaceincidence angle (45)standmicrowave cablesbeam width (15)
2006 2 2 ( )
: 2 m : 45: 40 cm
Calibration kit VNA Trihedral corner reflector
Calibration kit VNA Trihedral corner reflector
First returnSecondreturn
First return
surface water SecondreturnFirst return
surface water
First return
Scatterometer Measurement Model
Surface scattering Integral Equation Model (IEM)
Volume scattering , , Ice/water interface scattering/ ,
Inversion Modeling ,
(Genetic Algorithm)
: RMSE : RMSE = 0
Ice model
(1)First return Second return / RMSE = 0.0055 magnitudeNRMSE = 5.12%
(2)First return Second return RMSE = 0.0009 magnitudeNRMSE = 0.93 %
(2) -
(2) -
Surface water -
/ Second return / First return second return - , air bubble
/ SAR /
.
1.7, 0.13 mm