按照弹道导弹防御局的计划，NMD将进行5次大气层外的飞行试验，试验费用约5亿美元。而在外层空间识别真假弹头，是NMD的关键技术之一。 1997年以来，NMD系统进行了一系列试验。拦截弹上的动能杀伤飞行器（EKV）的关键设备红外探测器已成功进行了2次验证飞行试验，演示了其对模 According to the Ballistic Missile Defense Agency’s plan, the NMD will carry out five extraterrestrial flight tests at a cost of about 500 million U.S. dollars. Identifying authentic warheads in outer space is one of the key technologies of the NMD. Since 1997, the NMD system has conducted a series of experiments. The key equipment for KETs that intercept the EKV The infrared detector has been successfully tested in 2 flight simulations, demonstrating that its modulo