微波辐射率仪和地物微波辐射率
MICROWAVE EMISSIVITY MEASURING METER AND MICROWAVE EMISSIVITY OF THE SUBSTANCE COMPOSED EARTH SURFACE
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摘要: 根据微波辐射传输的特性,研制了微波辐射率仪,它可以隔离外界的干扰,用以研究不同因子对于地物微波辐射率的作用。微波辐射率仪由微波辐射计、辐射室和样品箱三部分组成。本文介绍了它的测量原理;在实验中对于微波辐射率仪的可靠性、稳定性及其精度进行了检验,结果证明其性能是好的,可在地物微波辐射率测量中使用。在实验中,进行了8.5mm和3.2cm波段地物(水、土壤)微波辐射率的测量,并分析其结果。Abstract: By the characteristics of microwave radiation transfer, a microwave emissivity measuring meter is constructed. This equipment may be used to study the factors which have influence on microwave emissivity of the substance composed earth surface in an isolation condition. The microwave emissivity measuring meter consists of three parts radiometer, radiation chamber and sample box. In this paper, the principle of measurement, the reliability and accuracy of experiment and the stability of instrument were studied in lab. The results show that the characteristics of microwave emissivity measuring meter were satisfied. It is suitable for measuring the microwave emissivity of the substance composed earth surface. In this paper, the experimental results of microwave(λ=8.5 mm and λ=3.2 cm) emissivity of water and sand were shown and discussed.
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