The AN/FPS-133 Air Force Space Surveillance System, colloquially known as the Space Fence, was a U.S. government multistatic radar system built to detect orbital objects passing over America.

The Air Force Space Surveillance System (AFSSS), also known as the "space fence", was a very high frequency radar network located at sites across the southern United States (from California to Georgia) with a centralized data processing site at the Naval Network and Space Operations Command in Dahlgren, Virginia.

2013年8月13日 · The AFSSS, which has been operational since 1961, is just one part of AFSPC’s global Space Surveillance Network. The system is designed to transmit a “fence” of radar energy vertically into space to detect all objects intersecting that fence.

-- The 21st Space Wing closed the Air Force Space Surveillance System due to resource constraints caused by sequestration, marking the end of its 52 years of service to the Space Situational Awareness mission, Oct. 1.

2013年8月13日 · AFSPC officials have devised modified operating modes for the Perimeter Acquisition Radar Characterization System at Cavalier Air Force Station, N.D., and for the space surveillance radar at Eglin...

The Space Fence will replace the Air Force Space Surveillance System, or AFSSS, which has been in service since 1961 and could track about 20,000 objects before being shut down last...

2013年8月13日 · The Air Force wants to replace AFSSS—often referred to as the “space fence”—with the new Space Fence system, but has been waiting on the Pentagon’s acquisition leadership to decide whether there’s the money, when …

Unlike the AFSSS, the new space fence will provide very precise positional data on orbiting objects and will be the most accurate radar in the Space Surveillance Network.

2016年8月19日 · AFSSs can react faster than human-in-the-loop systems due to human reaction time delays and the absence of communication. A faster response time allows destruct lines (DLs), designed to protect populations and resources, to be moved closer to protected/populated areas (impact limit lines, or ILLs).

The system is designed to transmit a “fence” of radar energy vertically into space to detect all objects intersecting that fence. The operational advantage of the AFSSS is its ability to detect objects in an un-cued fashion, rather than tracking objects based on previous information.