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本文从电磁波在分层介质中的传播理论出发,导出了适合我国北部海区一年生海冰的微波辐射遥感三层介质模式。与实测数据对比表明,当微波波长为10cm时,相干模式在海冰厚度小于20 cm范围内、非相干模式在20～40 cm范围内分别给出较好的拟合结果。以这些理论模式为依据可建立海冰厚度的微波遥感反演软件。文中给出了利用这些理论模式和实测数据推算出的辽东湾不同类型海冰的相对复介电常数,其数值范围为(0.5～4.0)—j(0.07～0.19)。
Based on the propagation theory of electromagnetic waves in stratified medium, this paper deduces the three-layer medium model of microwave radiation remote sensing that is suitable for annual sea ice in northern China. The results show that when the microwave wavelength is 10cm, the coherence mode is in the range of sea ice thickness less than 20 cm, and the non-coherent mode is better in 20-40 cm range respectively. Based on these theoretical models, a microwave remote sensing inversion software for sea ice thickness can be established. The relative complex permittivity of different types of sea ice in Liaodong Bay calculated by these theoretical models and measured data are given in the paper. The values range from (0.5 ~ 4.0) -j (0.07 ~ 0.19).