不同气象条件下雷达能量覆盖范围研究

Study on radar energy coverage under different meteorological conditions

基于实际地形和气象条件,通过插值技术实现从三维数字地球生成地形路径上高精确度的高程数据,结合大气折射率模型和抛物方程模型,计算电磁波在地形剖面上的传播损耗。通过方位角扫描,计算出单站雷达在空间特定高度的能量覆盖范围。仿真结果表明,该方法可同时考虑气象和地理因素对雷达能量覆盖范围的影响,与人眼视觉范围对比更能体现电磁波的传播效应,为有效预测复杂气象地理环境下雷达能量覆盖范围提供了一种可靠的技术途径。

Based on the actual terrain and meteorological conditions, a method of extracting highprecision elevation data on an arbitrary terrain path from a three-dimensional digital earth is achieved by interpolation, and combining with atmospheric refractive index model and parabolic equation model,the propagation loss of electromagnetic waves in any terrain profile is calculated. The energy coverage of a monostatic radar at a certain altitude of space is computed. The simulation results show that the method proposed in this paper can deal with effects on radar energy coverage caused by both meteorological and georaphical factors, and better exemplifies the propagation effects of electromagnetic waves while comparing with human visual range. It provides a reliable technical approach for predicting radar energy coverage in complex meteorological and geographic environments effectively.