Northrop Grumman Corporation has been awarded the first phase of a ＄30 million firm-fixed price U.S. Air Force contract to develop a global space surveillance ground radar system.

诺斯罗普·格鲁曼公司已经获得了美国空军第一阶段价值3000万美元的合同，以研发全球空间监视地面雷达系统。

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This proves that the one-dimensional trajectory amendments mode of ground radar surveillance and progroud fire-control center control is entirely feasible and can achieve low-cost and miniaturization.

由此可见，采用地面雷达导航、由地面火控中心发射指令的一维弹道修正方式完全可行，并可以做到低成本，小型化。

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That makes Raytheon, which produces missiles, defence electronics, radar and ground surveillance systems, especially attractive.

ECONOMIST: Transatlantic aerobatics