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首页> 美国政府科技报告 >Caracterizacao Radiometrica de Seis Solos NA Faixa-X de Microondas, Atraves de Medicoes DA Permitividade Complexa (Characterization of 6 Soils in the X-Band, Through Measurements of Complex Permittivity)
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Caracterizacao Radiometrica de Seis Solos NA Faixa-X de Microondas, Atraves de Medicoes DA Permitividade Complexa (Characterization of 6 Soils in the X-Band, Through Measurements of Complex Permittivity)

机译：Caracterizacao Radiometrica de seis solos Na Faixa-X de microondas，atraves de medicoes Da permitividade Complexa（通过测量复介电常数测量X波段6种土壤的特征）

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Estimating and monitoring up-to-date soil moisture conditions over extensive areas through passive (or active) microwave remote sensing techniques requires knowledge of the complex relative permittivity (epsilon sub r) in function of soil moisture. X-band measurements of epsilon sub r for different moisture conditions were made in laboratory for soil samples of six important soils. Using a theoretical model and computational programs, these measurements allowed estimates of the emissive characteristics of the soils that would be expected with the X-band microwave radiometer built at INPE. The results for soils from tropical regions showed that only the physical characteristics and properties of the soils are not sufficient to explain the behavior of epsilon sub r in function of soil moisture, indicating that the chemical and/or mineralogical properties of the soils do have an important contribution. The results also showed that epsilon sub r in function of soil moisture depends on soil class.

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