蒸发波导条件下雷达超视距探测频段利用率

Research on the Band's Utilizing Probability of Radar OTH Detection in condition of Evaporation

针对蒸发波导条件下雷达超视距探测波段的利用率问题,首先介绍最低陷获频率计算方法,随后仿真计算最低陷获频率随蒸发波导高度和理查森的变化特性,并结合某海区历史气象水文数据,计算最低陷获频率的分布概率,最后在此基础上得到雷达S、C和X波段对蒸发波导的利用率,该结论对于合理评估海上雷达在蒸发波导条件下的性能具有一定的参考价值。

For the band's utilizating probability of Radar OTH Detection in conditon of evaporation,firstly,the method of calculation of cut-off frequency is introduced. then the characteristic of cut-off frequency with the change of evaporation duct and Richard number is described,and the cut-off frequency's distribution based on the history hydrology records of some sea areas is calculated ,at last,the probability of utilization of evaporation duct for radar band of S,C and X is present,the conclustion is a refrence to the assessment of radar performance in condition of evaporation.