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Estimation of Soil Moisture Content from Backscattering Coefficients Using a Radar Scatterometer
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 Title & Authors
Estimation of Soil Moisture Content from Backscattering Coefficients Using a Radar Scatterometer
Kim, Yi-Hyun; Hong, Suk-Young; Lee, Jae-Eun;
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Microwave remote sensing can help monitor the land surface water cycle, crop growth and soil moisture. A ground-based polarimetric scatterometer has an advantage for continuous crop using multi-polarization and multi-frequencies and various incident angles have been used extensively in a frequency range expanding from L-band to Ka-band. In this study, we analyzed the relationships between L-, C- and X-band signatures and soil moisture content over the whole soybean growth period. Polarimetric backscatter data at L-, C- and X-bands were acquired every 10 minutes. L-band backscattering coefficients were higher than those observed using C- or X-band over the period. Backscattering coefficients for all frequencies and polarizations increased until Day Of Year (DOY) 271 and then decreased until harvesting stage (DOY 294). Time serious of soil moisture content was not a corresponding with backscattering over the whole growth stage, although it increased relatively until early August (R2, DOY 224). We conducted the relationship between the backscattering coefficients of each band and soil moisture content. Backscattering coefficients for all frequencies were not correlated with soil moisture content when considered over the entire stage (). However, we found that L-band HH polarization was correlated with soil moisture content (r
Microwave remote sensing;Scatterometer;Backscattering coefficients;Soil moisture content;Retrieval equations;
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COSMO-SkyMed SAR 영상을 이용한 밀 생육 모니터링,김이현;홍석영;이경도;장소영;이훈열;오이석;

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