八十年代中期,美空军将部署一种新的十分先进的电子系统,以便从很远的地方探测、摧毁战斗地域前沿附近的敌方重要目标。该系统叫做精确定位攻击系统(Precision Location/strike System),它是一种全天候昼夜工作的系统,1977年9月,美国防部批准了与洛克希德公司签订的1亿2千零30万美元、为期54个月的合同以后,进入了全面发展阶段。 In the mid-1980s, the U.S. Air Force will deploy a new and very advanced electronic system to detect from far away and destroy the enemy’s important targets near the frontiers of combat zones. The system, called the Precision Location / Strike System, is a system that works round-the-clock, day and night. In September 1977, the U.S. Department of Defense approved a $ 102.0 million contract with Lockheed After a 54-month contract, it entered an all-round development stage.