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基于地形对被动微波辐射的影响机理研究,利用AIEM模型模拟微波辐射的地形效应,建立实验地貌微缩景观,由车载微波辐射计进行观测,探索影响被动微波辐射特征的地形因子。地基实验表明,在低频波段本地入射角对山地倾斜表面的微波辐射有10K—15K的影响,小于10GHz的观测频率可以消除地形高度对微波辐射的影响。同时,实验验证微波极化受地表形态属性——山体坡向和山体形状的影响显著,地形坡度对极化信息影响不明显。
Based on the study of the mechanism of influence of topography on passive microwave radiation, AIEM model was used to simulate the topography effect of microwave radiation. Microlyscopic landscape of experimental landscape was established and observed by vehicle microwave radiometer to explore the topographic factors that affect the characteristics of passive microwave radiation. The ground-based experiments show that the local incident angle has a 10K-15K influence on the microwave radiation of the mountain inclined surface in the low frequency band, and the observation frequency less than 10GHz can eliminate the impact of the terrain height on the microwave radiation. At the same time, it is verified experimentally that the microwave polarization is affected by the morphology of the earth’s surface - the impact of the mountain slope and the shape of the mountain is significant, and the slope of the terrain has no obvious influence on the polarization information.