基于动态RCS模型的天波雷达发现概率计算方法

针对现有方法影响因素考虑不全导致计算结果与实际情况有较大偏差的问题,提出了一种改进的天波雷达飞机目标发现概率计算方法。归纳了不同电离层状态对天波雷达探测距离的影响。考虑目标在给定航路飞行过程中的雷达截面积随姿态变化,建立了目标动态雷达截面积计算模型。在此基础上,利用瞬时发现概率模型和综合发现概率模型求得天波雷达飞机目标发现概率。实例计算结果表明:电离层Es全遮蔽状态导致目标发现概率下降了0.273,不同航路和飞行姿态条件下目标发现概率差异较大,最大差值达0.253。

A Calculation Method of the Detection Probability for Sky-wave over the Horizon Radar Based on Dynamic RCS Model

In view of the problem that in the existing methods some effect factors are ill considered which lead up to the calculation results deviating from the fact, an improved calculation method of detection probability of aircraft for sky-wave radar is put forward, and the impact of different ionosphere states on detection distance of sky-wave radar is concluded. Taking the variety of target RCS with gesture during flight through given track into account, a calculation model of target dynamic RCS is established. On this basis, the detection probability of aircraft for sky-wave radar can be gotten by using the models of instantaneous detection probability and the comprehensive detection probability. The results show that ionosphere state of Es blanket leads to a decrease in target detection probability by 0.273. And the values of target detection probability are in great difference under the conditions of the different tracks and gestures, and the maximal different value reaches to 0.253. The feasibility and the validity of the method are verified by using living examples.