侧扫雷达安装在河岸上测量河流表面流速,是近年来出现的雷达新应用方向。雷达的探测距离与入射角、河流表面的波浪高度等有关。文中推导了P 波段侧扫雷达距离方程,分别采用经验模型和实际电磁计算的方式,采用分形理论构建水面散射特征实体模型,利用物理光学法与物理绕射理论相结合的方法,计算归一化散射系数。基于布设于宜昌某水文站内的侧扫雷达,文中将实测数据的回波信号转换成与入射角相对应的散射特征趋势描述性数据。通过实测数据与理论电磁计算结果相比较可知,采用水面散射特征计算方法得到的实际结果,与实测数据在趋势上能够吻合,具有较高的相似度和参考价值。

Side scan radar is installed on the river bank to measure the river surface velocity, which is a new application direction of radar in recent years. The detection range of radar is related to the incident angle and the wave height on the river surface. In this paper, the range equation of P-band side scan radar is derived. The empirical model and actual electromagnetic calculation are used respectively, the water surface scattering characteristic solid model is constructed by fractal theory, and the normalized scattering coefficient is calculated by the combination of physical optics and physical diffraction theory. Based on the side scan radar deployed in a hydrological station in Yichang, the echo signal of the measured data is converted into the scattering characteristic trend descriptive data corresponding to the incident angle. By comparing the measured data with the theoretical electromagnetic calculation results, it can be seen that the actual results calculated by the water surface scattering characteristic calculation method can be consistent with the measured data in trend, with high similarity and high reference value.

TB937