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“智能卵石”(也称“宝石”、“斑斓砾石”)是美国加利福尼亚州劳伦斯-利弗莫尔研究所著名物理学家劳韦尔·伍德经过3年的潜心研究,于1988年提出的一种成本较低,在2000年以前部署的新型天基防御系统。其部署方式是用一次性使用的运载火箭将多达5000个拦截器部署在距地球462.5公里的空间轨道上。每个“智能卵石”拦截器直径0.3米、长0.9米,结构重量45.4公斤,加上推进剂的发射全重约40～45公斤。
“Smart Pebble” (also known as “gem”, “gorgeous gravel”) is the result of three years of painstaking research conducted by Laver Wood, a famous physicist at the Lawrence-Livermore Institute in California. The new cost-effective space-based defense system deployed by the year 2000. Deployed as a single-use launch vehicle, up to 5,000 interceptors were deployed on a 462.5 km orbit of space from Earth. Each “smart pebble” interceptor diameter of 0.3 meters, 0.9 meters long, the weight of 45.4 kg structure, together with the propellant emission full weight about 40 to 45 kg.