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空间飞行器穿过电离层时,其远尾区与等离子体发生的非稳态相互作用可以通过一组高频场和密度扰动的非线性耦合方程来描述.从该组方程出发,通过线性分析得到扰动的色散方程.理论分析和数值计算表明,飞行器远尾区诱发场是调制不稳定的,它将会坍塌成小尺度的局域结构,并形成密度空穴,这为隐形飞行器的探测提供理论依据;诱发场的特征尺度与最大增长率不仅依赖于泵波振幅与扰动波矢量之间的夹角,同时也受到泵波能量密度的影响.
When a spacecraft crosses the ionosphere, its unsteady interaction with the plasma at the far tail zone can be described by a set of nonlinear coupling equations perturbed by high-frequency fields and densities. From this set of equations, it is obtained by linear analysis Perturbation dispersion equation.Theoretical analysis and numerical calculation show that the inducing field in the far tail zone of the aircraft is unstable in modulation and it will collapse into small-scale local structures and form density holes, which provides theory for the detection of stealth vehicles Based on this, the characteristic scale and the maximum growth rate of induced field depend not only on the angle between the amplitude of the pump wave and the disturbance wave vector, but also on the energy density of the pump wave.