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由于美国国防部打算在下个世纪之初，用先进的导弹预警系统来取代至少已服役了27年，并且已老化的“国防支援计划”（DSP）卫星系统。自1984年以来，美空军一直在探索、论证、发展和研究这种新系统。经多年努力，现已确定了下一代的先进导弹预警系统将采用称为“天基红外系统”
As the U.S. Department of Defense plans to replace the advanced Defense Early Warning Satellite (DSP) system that has been in existence for at least the past 27 years with an advanced missile warning system by the turn of the century. The U.S. Air Force has been exploring, demonstrating, developing and researching this new system since 1984. After years of hard work, the next generation of advanced missile warning systems has now been identified as “space-based infrared systems”