By using the line of sight (LOS) measurements from space based infrared sensors, free flight phase trajectory estimation problem of ballistic missile is studied.

主要研究空间预警系统利用星载红外传感器的视线测量估计弹道导弹自由飞行段弹道的问题。

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Then, the storage phase, standby phase, captive flight phase and free flight phase of the typical life profile of air-to-air missile are emphatically expounded.

之后对空空导弹典型寿命剖面中的贮存阶段、待命阶段、挂飞阶段、自主飞行阶段进行了重点阐述。

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Based on the rotor free-wake model and the rotor trim model, an analytical method is developed for the prediction of helicopter rotor induced velocities on missile trajectory.

应用自由尾迹方法和旋翼配平模型，建立了一个悬停和前飞状态旋翼在导弹发射线上的诱导速度计算模型。

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Kerry clarified a statement he made Saturday in Beijing, when he told reporters the U.S. could scale back its missile-defense posture in the region if North Korea goes nuclear-free.

NPR: As US Talks Up Diplomacy, NKorea Takes Hard Line

Yet, a Kremlin spokesman has already served notice that Moscow will feel free to abrogate the START follow-on treaty if it believes that U.S. missile defenses in Europe are a threat to its deterrent.

CENTERFORSECURITYPOLICY: False START

While some of these weapon and sensor systems like the Electromagnetic Railgun or the Free Electron Laser are at least a decade away, the Laser Weapon System and Air and Missile Defense Radar systems are almost ready for prime time deployment today.

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