预计该系统将于2015年投入首次运行，届时将替代美国空军的现有太空监视系统或‘甚高频篱笆’——自从20世纪60年代初期就开始服役。
Expected to begin initial operation in 2015, the system will replace the existing Air Force Space Surveillance system, or VHF Fence, which has been in service since the early 1960s.
预计该系统将于2015年投入首次运行，届时将替代美国空军的现有太空监视系统或‘甚高频篱笆’——自从20世纪60年代初期就开始服役。
Expected to begin initial operation in 2015, the system will replace the existing Air Force Space Surveillance system, or VHF Fence, which has been in service since the early 1960s.
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