基于毫米波辐射特性的水面植被检测方法

Detective Method for Aquatic Vegetation Based on Millimeter Wave Radiant Characteristics

摘要:

针对采用3 mm波段辐射计对水面植被辐射特性进行检测的问题,在研究分析了水面的亮度温度和水面植被的介电特性的基础上,采用相干法建立了水面植被辐射特性的多层介质模型,与3层介质模型相比,仿真结果与实验数据更加吻合,表明多层介质模型能更精确地模拟水面植被的辐射特性；通过实验得出,在不同的入射角下,水面植被亮温相比水面亮温均有上升,说明水面相比植被具有亮温低、冷目标的毫米波辐射特征,可利用毫米波辐射特性监测区域内水面植被。

Abstract:

Aim at the measurement of radiant characteristics of aquatic vegetation which use a 3mm radiometer, base on the study of water’s brightness temperatures and aquatic vegetation’s radiant characteristics. The establishment of multilayer dielectric model about aquatic vegetation is based on coherent method. Compared to 3 layer dielectric model, this model’s result is in better accordance with the experimental data. this shows that the multilayer dielectric model can model aquatic vegetation’s radiant characteristics more precisely. The experiment shows that the aquatic vegetation’s brightness temperature is higher than water's in different incident angles. This result shows that water has millimeter wave radiant characteristics of low brightness temperature、cold target compared to aquatic vegetation, so the radiant characteristics can be used to monitor aquatic vegetation .