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FLR-9
The AN/FLR-9 is a type of very large circular "Wullenweber" antenna array, built at eight locations during the cold war for HF/DF direction finding of high priority targets. The worldwide network, known collectively as "Iron Horse", could locate HF communications almost anywhere on Earth. Because of the exceptionally large size of its outer reflecting screen (1056 vertical steel wires supported by 96 towers), the FLR-9 was commonly referred to by the nickname "Elephant Cage." Constructed in the early to mid 1960s, in May 2016 the last operational FLR-9 at Joint Base Elmendorf-Richardson in Alaska was decommissioned. It can be confused with the US Navy's AN/FRD-10, which also used a Wullenweber antenna. Description The ''AN/FLR-9 Operation and Service Manual'' describes the array as follows: The antenna array is composed of three concentric rings of antenna elements. Each ring of elements receives RF signals for an assigned portion of the 1.5 to 30-MHz radio spectrum. The ou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wullenweber
The Wullenweber (the original name introduced by Dr. Hans Rindfleisch was Wullenwever) is a type of Circularly Disposed Antenna Array (CDAA) sometimes referred to as a Circularly Disposed Dipole Array (CDDA). It is a large circular antenna array used for radio direction finding. It was used by the military to triangulate radio signals for radio navigation, intelligence gathering and search and rescue. Because its huge circular reflecting screen looks like a circular fence, the antenna has been colloquially referred to as the ''elephant cage.'' The term ''wullenwever'' was the World War II German cover term used to identify their secret CDAA research and development program; its name is unrelated to any person involved in the program. History Origin in World War II Germany Wullenweber technology was developed by the German navy communication research command, Nachrichtenmittelversuchskommando (NVK) and Telefunken during the early years of World War II. The inventor was NVK group ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AN/FRD-10
The AN/FRD-10 Circularly Disposed Antenna Array (CDAA) is a United States Navy circular "Wullenweber" antenna array, built at a number of locations during the cold war for high frequency radio direction finding (HF/DF) and signals intelligence. In the Joint Electronics Type Designation System, FRD stands for ''fixed ground, radio, direction'' finding. 14 sites were originally constructed as a part of the "Classic Bullseye" program. Two AN/FRD-10 systems were later installed in Canada. AN/FRD-10 systems were originally constructed in the early 1960s, but after the dissolution of the Soviet Union, the systems began to be shut down and demolished. The Naval Security Group operated and maintained the U.S. Navy AN/FRD-10 systems. The system had several nicknames including ''Fred-10'' and ''Elephant'' or ''Dinosaur cages''. As of 2015, none of the US Navy AN/FRD-10 sites are extant, but the two Canadian sites remain in service. The AN/FLR-9 was a system with a similar design and functi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
San Vito Dei Normanni Air Station
San Vito dei Normanni Air Station was a United States Air Force facility located west of Brindisi, Apulia, between the port of Brindisi and the town of San Vito dei Normanni, Italy. 1960 - Base activated Staffed by the 7275th Air Base Group, San Vito AB began as an off-base installation of Aviano Air Base with support personnel and equipment furnished by the 6900th Security Wing in 1960. It became a primary installation on 1 March 1961. operated since its activation by the United States Air Force Security Service (USAFSS). 1964 - High frequency monitoring array In 1964, a HF monitoring/receiving system of a large circular antenna array for COMINT purposes was installed. This AN/FLR-9 receiving system was operational until October 1994. 1979 - 6917th Electronic Security Group On 1 October 1979, the base reverted to HQ Sixteenth AF (USAFE), hosting the 6917th Electronic Security Group and other assigned U.S. and Allied units and organizations. 1990 - Air Force Space Command es ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Misawa AB
is an air base of the Japan Air Self-Defense Force (JASDF), the United States Air Force, and the United States Navy located in Misawa, Aomori, in the northern part of the island of Honshū of Japan. It is located northeast of Misawa railway station, west of the Pacific Ocean, northeast of Towada, northwest of Hachinohe, and north of Tokyo at the "Tip of the Spear". It is a Pacific Air Forces (PACAF) facility with the 35th Fighter Wing (35 FW, about 48 F-16 aircraft split among the 13th and 14th Fighter Squadrons) as its host wing. It hosts both Japanese and American troops. History Origins What is now called Misawa Air Base has been used by the military since the Meiji period, when it was used as a cavalry training center for the Imperial Army. In 1870, the Emperor Meiji established a stud farm for the household cavalry in the area that later became Misawa AB, and kept his own (Tenno Heika) cavalry there until 1931, when the Sino-Japanese conflict required th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Direction Finding
Direction finding (DF), or radio direction finding (RDF), isin accordance with International Telecommunication Union (ITU)defined as radio location that uses the reception of radio waves to determine the direction in which a radio station or an object is located. This can refer to radio or other forms of wireless communication, including radar signals detection and monitoring (ELINT/ESM). By combining the direction information from two or more suitably spaced receivers (or a single mobile receiver), the source of a transmission may be located via triangulation. Radio direction finding is used in the navigation of ships and aircraft, to locate emergency transmitters for search and rescue, for tracking wildlife, and to locate illegal or interfering transmitters. RDF was important in combating German threats during both the World War II Battle of Britain and the long running Battle of the Atlantic. In the former, the Air Ministry also used RDF to locate its own fighter gr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RAF Chicksands
Ministry of Defence Chicksands or more simply MoD Chicksands is a UK Ministry of Defence station located 7.7 miles (12.4 km) south east of Bedford, Bedfordshire and 11.6 miles (18.7 km) north east of Luton, Bedfordshire. Now the location of the Defence Intelligence and Security Centre (DISC), it was previously named RAF Chicksands. It closed in 1997 when responsibility for the camp was taken over by the British Army Intelligence Corps. Near the town of Shefford it is named after Chicksands Priory, a 12th-century Gilbertine monastery located within the perimeter of the camp. Site history The Crown Commissioners bought the Chicksands estate on 15 April 1936, later renting it to Gerald Bagshawe, who lived there until it was requisitioned by the Royal Navy. After nine months the RAF took over operations and established a signal intelligence collection (SIGINT) unit there, known as a Y Station. The site operated as a SIGINT collection site throughout the Second World War, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
USASA Field Station Augsburg
United States Army Security Agency (USASA) Field Station Augsburg was the site of a Wullenweber AN/FLR-9 (V8) radio direction finder, established during the Cold War. Field Station Augsburg was located on Gablingen Kaserne, near the village of Gablingen just north of Augsburg in Bavaria, West Germany. It was one of nearly 20 field stations positioned strategically around the world by the U.S. Armed Forces during the Cold War. Field Station Augsburg opened in 1970 and closed in 1998, at which time it was turned over to the German government. The Station was owned and managed by the National Security Agency and staffed by the U.S. Army Security Agency (USASA), which later became U.S. Army Intelligence and Security Command (INSCOM), in conjunction with other branches of the U.S. Military and various allied forces. Personnel assigned to Field Station Augsburg were composed[ of individuals who scored high enough on the Army entrance exams to be classified as "ST" or a skilled technic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thailand
Thailand ( ), historically known as Siam () and officially the Kingdom of Thailand, is a country in Southeast Asia, located at the centre of the Indochinese Peninsula, spanning , with a population of almost 70 million. The country is bordered to the north by Myanmar and Laos, to the east by Laos and Cambodia, to the south by the Gulf of Thailand and Malaysia, and to the west by the Andaman Sea and the extremity of Myanmar. Thailand also shares maritime borders with Vietnam to the southeast, and Indonesia and India to the southwest. Bangkok is the nation's capital and largest city. Tai peoples migrated from southwestern China to mainland Southeast Asia from the 11th century. Indianised kingdoms such as the Mon, Khmer Empire and Malay states ruled the region, competing with Thai states such as the Kingdoms of Ngoenyang, Sukhothai, Lan Na and Ayutthaya, which also rivalled each other. European contact began in 1511 with a Portuguese diplomatic mission to Ayutthaya, w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japan
Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north toward the East China Sea, Philippine Sea, and Taiwan in the south. Japan is a part of the Ring of Fire, and spans Japanese archipelago, an archipelago of List of islands of Japan, 6852 islands covering ; the five main islands are Hokkaido, Honshu (the "mainland"), Shikoku, Kyushu, and Okinawa Island, Okinawa. Tokyo is the Capital of Japan, nation's capital and largest city, followed by Yokohama, Osaka, Nagoya, Sapporo, Fukuoka, Kobe, and Kyoto. Japan is the List of countries and dependencies by population, eleventh most populous country in the world, as well as one of the List of countries and dependencies by population density, most densely populated and Urbanization by country, urbanized. About three-fourths of Geography of Japan, the c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CDAA Elmendorf AFB - a large circular antenna used by the military
{{disambig ...
CDAA may refer to: * Cave Divers Association of Australia Inc. - an association that represents Australian recreational cave divers. * Circularly Disposed Antenna Array The Wullenweber (the original name introduced by Dr. Hans Rindfleisch was Wullenwever) is a type of Circularly Disposed Antenna Array (CDAA) sometimes referred to as a Circularly Disposed Dipole Array (CDDA). It is a large circular antenna arra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Turkey
Turkey ( tr, Türkiye ), officially the Republic of Türkiye ( tr, Türkiye Cumhuriyeti, links=no ), is a list of transcontinental countries, transcontinental country located mainly on the Anatolia, Anatolian Peninsula in Western Asia, with a East Thrace, small portion on the Balkans, Balkan Peninsula in Southeast Europe. It shares borders with the Black Sea to the north; Georgia (country), Georgia to the northeast; Armenia, Azerbaijan, and Iran to the east; Iraq to the southeast; Syria and the Mediterranean Sea to the south; the Aegean Sea to the west; and Greece and Bulgaria to the northwest. Cyprus is located off the south coast. Turkish people, Turks form the vast majority of the nation's population and Kurds are the largest minority. Ankara is Turkey's capital, while Istanbul is its list of largest cities and towns in Turkey, largest city and financial centre. One of the world's earliest permanently Settler, settled regions, present-day Turkey was home to important Neol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Italy
Italy ( it, Italia ), officially the Italian Republic, ) or the Republic of Italy, is a country in Southern Europe. It is located in the middle of the Mediterranean Sea, and its territory largely coincides with the homonymous geographical region. Italy is also considered part of Western Europe, and shares land borders with France, Switzerland, Austria, Slovenia and the enclaved microstates of Vatican City and San Marino. It has a territorial exclave in Switzerland, Campione. Italy covers an area of , with a population of over 60 million. It is the third-most populous member state of the European Union, the sixth-most populous country in Europe, and the tenth-largest country in the continent by land area. Italy's capital and largest city is Rome. Italy was the native place of many civilizations such as the Italic peoples and the Etruscans, while due to its central geographic location in Southern Europe and the Mediterranean, the country has also historically been home ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
