空间目标监视雷达电波折射修正方法

The radio wave refraction correction method of space target surveillance radar

电波环境造成的电波折射对空间目标监视雷达的探测精度影响非常大。论文对对流层和电离层进行数学建模;提出采用数据驱动模型的方法更新模型,以此提高模型精度;推导了目标位于大气层内和电离层内的电波折射修正公式;采用气象实测数据和电离层探测数据分别驱动对流层和电离层模型,并开展了2种模型精度分析验证。最后对空间目标监视雷达开展了电波环境折射修正仿真验证,实验结果表明:雷达斜距测量误差减小了36.9%,仰角测量误差减小了24.3%。论文提出的方法已在某型雷达进行了工程应用,与原系统经验公式修正相比,修正效果明显。

Radio wave refraction caused in a radio wave environment has a great influence on the detection accuracy for space target surveillance radar.The troposphere and ionosphere are modeled mathematically in this paper.In order to improve the precision of the model,a data-driven model updating method is firstly proposed.The correction formulas of radio wave refraction for targets in the atmosphere and ionosphere are derived.Then,the tropospheric and ionospheric models are driven by meteorological data and ionosphere probing data respectively,and the precision of the two models is verified.Finally,radio wave environment refraction correction simulation verification is carried out for the space target surveillance radar.The experimental results show that the measurement error of the radar slant distance reduces by 36.9%,and the elevation measurement error reduces by 24.3%.The method presented in this paper has been applied to a certain type of radar in engineering.Compared with the modification of the empirical formulas in the original system,the correction effect is remarkable.