America already has the world's most developed space monitoring system with a network of radars and telescopes. But its surveillance is patchy.
美国一直都拥有全球最发达的由雷达和望远镜网络组成的太空监测系统，但其侦察零散不全。
The Space Fence program is a multi-phase acquisition leading to the delivery of up to three globally positioned S-band radars capable of interoperation with the Space Surveillance Network.
太空护栏计划是一个多阶段的采购项目，交付3个全球定位S波段雷达系统，能够完成空间监测网互操作。
Space Fence is envisioned as a network of ground-based S-band radars that will detect, track, measure and catalog thousands of objects in low-Earth orbit.
设想中的‘太空篱笆’为地基s波段雷达网络，将可探测、跟踪、测量和分类近地轨道成千上万的太空物体。
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