鉴于肩扛式导弹对民用飞机的威胁与日俱增,而在民用飞机上安装定向红外对抗系统的成本又太高,美国国土安全局开始寻求一种高空长航时无人机的方案,它可以在机场上空保护民用飞机在起飞着陆时免受导弹袭击。 In view of the increased threat of shoulder-fired missiles to civilian aircraft and the cost of installing IR-confrontational systems on civilian aircraft is too high, the United States Department of Homeland Security began to seek a solution to the UAV’s long-haul UAV, Protection of civil aircraft from missiles during takeoff and landing.