Space Fence space surveillance system

E77492

ground-based radar system space situational awareness asset space surveillance system

The Space Fence space surveillance system is a U.S. Air Force-operated, Lockheed Martin–built radar network designed to track and catalog objects in Earth orbit with unprecedented precision.

Try in SPARQL Jump to: Surface forms Disambiguation Statements Elicitation Referenced by

All labels observed (5)

Label	Occurrences
Air Force Space Surveillance System	1
Space Fence Program	1
Space Fence space surveillance system canonical	1
Space Sensing	1
U.S. Space Surveillance Network	1

How this entity was disambiguated

This entity first appeared as the object of triple T617429 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Space Fence space surveillance system
Context triple: [Lockheed Martin, notableProgram, Space Fence space surveillance system]

A. Space-Based Infrared System
The Space-Based Infrared System (SBIRS) is a U.S. military satellite constellation designed to provide global missile launch detection, missile defense support, and strategic infrared surveillance.
B. Starlink satellite constellation
The Starlink satellite constellation is a large network of low Earth orbit satellites developed by SpaceX to provide high-speed, low-latency global internet coverage.
C. Air Force Satellite Control Network
The Air Force Satellite Control Network is a global system of ground stations and facilities that provides command, control, and communications for U.S. military and national security satellites.
D. Joint Task Force–Space Defense
Joint Task Force–Space Defense is a U.S. military organization responsible for protecting and defending American and allied interests in space through space domain awareness and defensive space operations.
E. NASA field center network
The NASA field center network is a system of geographically distributed research and operational centers that carry out NASA’s missions in aeronautics, space exploration, and scientific discovery.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Space Fence space surveillance system
Target entity description: The Space Fence space surveillance system is a U.S. Air Force-operated, Lockheed Martin–built radar network designed to track and catalog objects in Earth orbit with unprecedented precision.

A. Space-Based Infrared System
The Space-Based Infrared System (SBIRS) is a U.S. military satellite constellation designed to provide global missile launch detection, missile defense support, and strategic infrared surveillance.
B. Starlink satellite constellation
The Starlink satellite constellation is a large network of low Earth orbit satellites developed by SpaceX to provide high-speed, low-latency global internet coverage.
C. Air Force Satellite Control Network
The Air Force Satellite Control Network is a global system of ground stations and facilities that provides command, control, and communications for U.S. military and national security satellites.
D. Joint Task Force–Space Defense
Joint Task Force–Space Defense is a U.S. military organization responsible for protecting and defending American and allied interests in space through space domain awareness and defensive space operations.
E. NASA field center network
The NASA field center network is a system of geographically distributed research and operational centers that carry out NASA’s missions in aeronautics, space exploration, and scientific discovery.
F. None of above. chosen

Statements (49)

Predicate	Object
instanceOf	ground-based radar system ⓘ space situational awareness asset ⓘ space surveillance system ⓘ
alsoKnownAs	AFSSS replacement ⓘ
capability	high-precision tracking of small orbital objects ⓘ high-rate surveillance of large volumes of space ⓘ
contractAwardedTo	Lockheed Martin in 2014 ⓘ
contractor	Lockheed Martin Space Systems ⓘ linked to: Lockheed Martin Space
country	United States ⓘ linked to: United States of America
customer	U.S. Department of Defense ⓘ linked to: Department of Defense
designedBy	Lockheed Martin engineers ⓘ linked to: Lockheed Martin
formerOperator	United States Air Force ⓘ
frequencyBand	S-band ⓘ
fundingAgency	U.S. Air Force Space Command ⓘ linked to: Air Force Space Command
initialOperationalCapability	March 2020 ⓘ
locatedIn	Kwajalein Atoll ⓘ Republic of the Marshall Islands ⓘ linked to: Marshall Islands
manufacturer	Lockheed Martin ⓘ
mission	improve accuracy of the space object catalog ⓘ provide uncued detection of space objects ⓘ
operator	United States Space Force ⓘ
orbitsCovered	geosynchronous orbit ⓘ low Earth orbit ⓘ medium Earth orbit ⓘ
partOf	U.S. Space Surveillance Network ⓘ linked to: Space Fence space surveillance system
primarySite	Kwajalein Atoll, Marshall Islands ⓘ linked to: Kwajalein Atoll
programOfRecord	Space Fence Program ⓘ linked to: Space Fence space surveillance system
purpose	cataloging objects in Earth orbit ⓘ space debris tracking ⓘ space object tracking ⓘ space situational awareness ⓘ
replaced	Air Force Space Surveillance System ⓘ linked to: Space Fence space surveillance system
resolution	can detect objects smaller than 10 centimeters in low Earth orbit ⓘ
site	U.S. Army Garrison–Kwajalein Atoll ⓘ linked to: U.S. Army Kwajalein Atoll (USAKA) missile range
status	operational ⓘ
supports	Combined Space Operations Center ⓘ linked to: Joint Space Operations Center Joint Space Operations Center ⓘ collision avoidance for satellites ⓘ conjunction assessment ⓘ space domain awareness ⓘ space traffic management ⓘ
technology	digital beamforming ⓘ phased-array radar ⓘ
tracks	artificial satellites ⓘ microsatellites ⓘ small orbital fragments ⓘ space debris ⓘ spent rocket bodies ⓘ
uses	S-band radar ⓘ