강원대학교 지구물리학과 원격탐사연구실 한향선 , 이훈열
description
Transcript of 강원대학교 지구물리학과 원격탐사연구실 한향선 , 이훈열
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Modeling of physical properties of lake ice by using microwave scatterometer and genetic algorithm
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(Microwave Scatterometer) , , /
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/ , , air bubble
air bubble ,
/ volume inhomogeneity
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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)
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2006 2 2 ( )
: 2 m : 45: 40 cm
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Calibration kit VNA Trihedral corner reflector
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Calibration kit VNA Trihedral corner reflector
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First returnSecondreturn
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First return
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surface water SecondreturnFirst return
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surface water
First return
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Scatterometer Measurement Model
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Surface scattering Integral Equation Model (IEM)
Volume scattering , , Ice/water interface scattering/ ,
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Inversion Modeling ,
(Genetic Algorithm)
: RMSE : RMSE = 0
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Ice model
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(1)First return Second return / RMSE = 0.0055 magnitudeNRMSE = 5.12%
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(2)First return Second return RMSE = 0.0009 magnitudeNRMSE = 0.93 %
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(2) -
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(2) -
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Surface water -
/ Second return / First return second return - , air bubble
/ SAR /
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1.7, 0.13 mm