这些 陆基系统不会对空间飞行器造成持久性的伤害并且不会在轨道上生成碎片。

They would inflict no lasting damage to spacecraft and create no debris in orbit.

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雷神公司和拉菲尔公司还合作研制了“大卫投石索”武器系统，该产品是机动陆基导弹防御项目以及“蓝麻雀”导弹防御目标项目的一部分。

Raytheon and Rafael are also teaming on the David Sling Weapon System, which is a mobile, land-based missile defense program, and the Blue Sparrow missile defense targets program.

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陆基中程防御系统（GMD）于2004年9月开始酝酿实施，成为美国首个投入运行可覆盖50州的导弹防御工程。

TheGround-based Midcourse Defense (GMD) system, scheduled for deploymentin September 2004, will be the United States’ first operational missiledefense program capable of protecting all 50 states.

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