FLR-9 antenna array

E515296

Cold War military installation circular antenna array high-frequency direction-finding system signals intelligence collection system

The FLR-9 antenna array is a large, circular high-frequency direction-finding system used during the Cold War for long-range signals intelligence and communications interception.

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All labels observed (7)

Label	Occurrences
Chicksands Circularly Disposed Antenna Array	1
FLR-9 antenna array canonical	1
High Frequency Direction Finding	1
High-Frequency Direction Finding	1
Wullenweber antenna array	1
Wullenweber antenna array at RAF Chicksands	1
Wullenweber direction-finding principle	1

How this entity was disambiguated

This entity first appeared as the object of triple T5374347 — 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: FLR-9 antenna array
Context triple: [RAF Chicksands, hasFacility, FLR-9 antenna array]

A. APY-10 multi-mission surface search radar
The APY-10 multi-mission surface search radar is an advanced maritime surveillance and targeting radar system used on platforms like the Boeing P-8 Poseidon for detecting, tracking, and classifying surface and subsurface contacts in all weather conditions.
B. Erieye radar
The Erieye radar is a Swedish airborne early warning and control (AEW&C) radar system known for its active electronically scanned array (AESA) technology and long-range surveillance capabilities.
C. ALTAIR radar
ALTAIR radar is a powerful tracking and surveillance radar system located on Kwajalein Atoll, used primarily for space object tracking and missile defense research.
D. J/APG-1 AESA radar
The J/APG-1 is an advanced Japanese active electronically scanned array (AESA) fire-control radar developed for modern fighter aircraft, offering high-resolution tracking, multi-target engagement, and improved resistance to jamming.
E. Allen Telescope Array
The Allen Telescope Array is a large, multi-dish radio telescope facility in California designed primarily for simultaneous radio astronomy and the search for extraterrestrial intelligence.
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: FLR-9 antenna array
Target entity description: The FLR-9 antenna array is a large, circular high-frequency direction-finding system used during the Cold War for long-range signals intelligence and communications interception.

A. APY-10 multi-mission surface search radar
The APY-10 multi-mission surface search radar is an advanced maritime surveillance and targeting radar system used on platforms like the Boeing P-8 Poseidon for detecting, tracking, and classifying surface and subsurface contacts in all weather conditions.
B. Erieye radar
The Erieye radar is a Swedish airborne early warning and control (AEW&C) radar system known for its active electronically scanned array (AESA) technology and long-range surveillance capabilities.
C. ALTAIR radar
ALTAIR radar is a powerful tracking and surveillance radar system located on Kwajalein Atoll, used primarily for space object tracking and missile defense research.
D. J/APG-1 AESA radar
The J/APG-1 is an advanced Japanese active electronically scanned array (AESA) fire-control radar developed for modern fighter aircraft, offering high-resolution tracking, multi-target engagement, and improved resistance to jamming.
E. Allen Telescope Array
The Allen Telescope Array is a large, multi-dish radio telescope facility in California designed primarily for simultaneous radio astronomy and the search for extraterrestrial intelligence.
F. None of above. chosen

Statements (53)

Predicate	Object
instanceOf	Cold War military installation ⓘ circular antenna array ⓘ high-frequency direction-finding system ⓘ signals intelligence collection system ⓘ
alsoKnownAs	Elephant Cage ⓘ Wullenweber antenna array ⓘ linked to: FLR-9 antenna array
capableOf	determining bearing of HF radio transmitters ⓘ intercepting over-the-horizon HF communications ⓘ
controlledBy	Electronic Security Command ⓘ United States Air Force Security Service ⓘ linked to: United States Air Force Security Service network
countryOfDeployment	Germany ⓘ Italy ⓘ Japan ⓘ Philippines ⓘ Turkey ⓘ United Kingdom ⓘ United States ⓘ linked to: United States of America
designedFor	360-degree azimuth coverage ⓘ long-range HF signal coverage ⓘ
developedBy	United States defense contractors ⓘ
hasComponent	central operations building ⓘ concentric rings of vertical antenna elements ⓘ receiver and processing equipment ⓘ underground or buried cabling network ⓘ
locatedAt	Augsburg Gablingen ⓘ linked to: Schwabmünchen Clark Air Base ⓘ Elmendorf Air Force Base ⓘ linked to: Joint Base Elmendorf–Richardson Karamürsel Air Station ⓘ Misawa Air Base ⓘ RAF Chicksands ⓘ San Vito dei Normanni Air Station ⓘ
operatedBy	United States Air Force ⓘ United States military ⓘ linked to: United States Armed Forces
operationalPeriod	1960s ⓘ 1970s ⓘ 1980s ⓘ early 1990s ⓘ
partOf	United States signals intelligence network ⓘ global HF direction-finding network ⓘ
purpose	monitoring military and diplomatic communications ⓘ strategic and tactical intelligence collection ⓘ
relatedTo	AN/FLR-9 ⓘ HF/DF (high-frequency direction finding) ⓘ
shape	circular ⓘ
technologyType	high-frequency radio system ⓘ
typicalDiameter	several hundred meters ⓘ
usedBy	North Atlantic Treaty Organization ⓘ linked to: NATO allied intelligence services ⓘ
usedDuring	Cold War ⓘ
usedFor	high-frequency direction finding ⓘ long-range communications interception ⓘ radio direction finding ⓘ signals intelligence ⓘ

How these facts were elicited