The analysis of the intercept window for ballistic missile midcourse defense is put forward based on the two-body theory, since the midcourse flight of a ballistic missile is nearly a two-body motion.

根据弹道导弹中段飞行近似为二体运动的特点，应用二体运动理论分析了弹道导弹中段防御的拦截窗口。

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The test, in which an Aegis ballistic missile cruiser shot down a target fired from Hawaii, was the first exo-atmospheric kinetic intercept of a ballistic missile in the ascent phase of flight, and the third intercept from an Aegis warship.

CENTERFORSECURITYPOLICY: Sea change in missile defense

Such defenses have the potential to intercept ballistic missiles early in their flight, i.e.

CENTERFORSECURITYPOLICY: Critics' Study Makes Case for 'Layered' Missile Defense