Sent_en: 2zh Development on this $350 million system by Northrop Grumman Corporation was begun in March of 2004 with basic operation achieved in just 4 months.
Sent_yy: 诺斯罗普·格鲁曼公司于2004年3月开始开发这个价值3.5亿美元的系统，仅用了4个月便实现了基本操作。