表面波导对雷达低空探测误差影响的研究

Research of Radar Detection Errors of Low Altitude Targets Influenced by Surface Wave-guide

电磁波在海洋大气环境中传播,受表面波导这种异常现象的影响常常呈现出复杂的折射特征,这对雷达定位的精确性具有重要影响,针对这一问题,文中建立了表面波导环境下电磁波传播真实轨迹的精确算法,利用仿真手段研究了表面波导对雷达低空探测(仰角<5°)误差的影响,仿真结果表明,表面波导环境下电磁波出现“陷获”传播时,射线的真实轨迹明显偏离视在轨迹,形成了雷达低空探测时极明显的异常高度误差和仰角误差。

Propagating in surface wave-guide, an abnormal refraction phenomenon in marine atmospheric environment, electromagnetic wave often demonstrates complicated refraction characteristics, which has important influence on accuracy of radar detection. An accurate algorithm of electromagnetic wave actual ray trace in the condition of surface waveguide is established, and radar detection errors （elevation angle less than 5°） affected by it are investigated in this paper. The simulation results show that the actual ray trace is obviously different from apparent ray trace when the electromagnetic wave is trapped in surface wave-guide, which causes significant anomalous height error, angle error of radar detection.