The ground - based midcourse defense system , as it is called , will start off with no more than 10 “ hit - to - kill ” interceptors designed to collide directly with incoming missiles in space 在初期,陆基中层防御系统只有10枚以下的击杀拦截载具,设计用来在太空直接撞击并摧毁来袭飞弹。
Removing the pilot from the cockpit means the uav has to be wirelessly connected to its controllers by vulnerable data links , whether via satellites or ground - based receivers 让飞行员离开驾驶舱意味着无人机要通过安全欠佳的数据通信与它的操控者进行无线连接,不论是通过卫星还是地面接收器。
Over the last year three teams , one using instruments on the mars express orbiter and two using ground - based telescopes , say they have detected methane in the martian atmosphere 去年,一组使用“火星特快”探测器,及另外两个通过地面望远镜进行观测的团队,都表示他们在火星大气中发现了甲烷。
According to a spokesman for the national security council , the ground - based , medium - range ballistic missile knocked an old chinese weather satellite from its orbit about 537 miles above earth 据(美国)国家安全理事会发言人说,该地基中程弹道导弹击中了距地球537英里外的一颗中国的旧气象卫星。
Previous maps of the earth ' s gravity relied on the tracking of dozens of individual satellites , launched into orbit for other purposes , and on ground - based sensors at a handful of locations 过去所得的地球重力图,仅能仰赖数十个因其他目的而个别发射的人造卫星,以及仅限于少数几个地点的地面测定仪。