强度最大处位于飞机正下方，随着离飞行路线的横向距离的增大强度不断减小，直到因为冲击波在地面的折射而消失。
Maximum intensity is directly beneath the aircraft, and decreases as the lateral distance from the flight path increases until it ceases to exist because the shock waves refract away from the ground.
目前渐变折射率透镜的应用，通常都采用其主轴就是光线传播的光轴（横向应用）的形式，未见主轴垂直光轴应用的纵向应用分析说明。
The application of GRIN rod lens is usually used with its core as optical axis, this is transverse application, and any analyze for vertical application is not seen.
严格的数值计算结果表明：两类透镜的纵、横向球差都随折射率梯度的增强而减小。
The accurate expressions to calculate the aberration for two sorts of lens decrease on the increase of gradient index.
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