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Airborne Radio Relay
Airborne radio relay is a technique employing aircraft fitted with radio relay stations for the purpose of increasing the range, flexibility, or physical security of communications systems. The aircraft may be manned or unmanned aerial vehicles. Use in Vietnam One of the first uses of airborne radio relay was by the United States Army's 1st Cavalry Division in the Battle of Ia Drang during the Vietnam War, which employed the technique to improve communications with commanders at headquarters. The action of war had shifted to the borders of Laos and Cambodia, where the hilly terrain made the monetary and human cost of seizing and holding high ground, and airlifting and installing radio relay equipment prohibitive. In 1968, the Department of the Army provided four specially-equipped relay aircraft to the Division, which proved invaluable throughout the country, in particular, during the 1st Cavalry Division's relief of Khe Sanh in 1968. The use of airborne radio relay was a great su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radio Relay
Radio stations that cannot communicate directly due to distance, terrain or other difficulties sometimes use an intermediate radio relay station to relay the signals. A radio relay receives weak signals and retransmits them, often in a different direction, as a stronger signal. Examples include airborne radio relay, microwave radio relay, and communications satellite. The American Radio Relay League was founded for this purpose but did not change its name when this became a less important part of its work. See also *Repeater *Transponder *Broadcast relay station A broadcast relay station, also known as a satellite station, relay transmitter, broadcast translator (U.S.), re-broadcaster (Canada), repeater ( two-way radio) or complementary station (Mexico), is a broadcast transmitter which repeats (or tr ... Radio communications {{radio-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Department Of The Army
The United States Department of the Army (DA) is one of the three military departments within the United States Department of Defense, Department of Defense of the U.S. The Department of the Army is the Federal government of the United States, federal government agency within which the United States Army (U.S.) is organized, and it is led by the United States Secretary of the Army, secretary of the Army, who has statutory authority under 10 United States Code § 7013 to conduct its affairs and to prescribe regulations for its government, subject to the limits of the law, and the directions of the United States Secretary of Defense, secretary of defense and the President of the United States, president. The secretary of the army is a civilian official appointed by the president and confirmed by the United States Senate, Senate. The highest-ranking military officer in the department is the Chief of Staff of the United States Army, chief of staff of the Army, who is also a member ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Battlefield Airborne Communications Node
The Battlefield Airborne Communications Node (BACN) is a United States Air Force (USAF) airborne communications Repeater, relay and Gateway (telecommunications), gateway system carried by the unmanned Northrop Grumman RQ-4 Global Hawk, EQ-4B and the manned Bombardier Global 6000, Bombardier E-11A aircraft. BACN enables Real-time computing, real-time information flow across the battlespace between similar and dissimilar Tactical Data Links, tactical data link and voice systems through relay, bridging, and data translation in Line-of-sight propagation, line-of-sight and Non-line-of-sight propagation, beyond-line-of-sight situations. Its ability to translate between dissimilar communications systems allows them to interoperability, interoperate without modification. Because of its flexible Military deployment, deployment options and ability to operate at high altitudes, BACN can enable air and surface forces to overcome communications difficulties caused by mountains, other rough t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electromagnetic Interference
Electromagnetic interference (EMI), also called radio-frequency interference (RFI) when in the radio frequency spectrum, is a disturbance generated by an external source that affects an electrical circuit by electromagnetic induction, electrostatic coupling, or conduction. The disturbance may degrade the performance of the circuit or even stop it from functioning. In the case of a data path, these effects can range from an increase in error rate to a total loss of the data. Both man-made and natural sources generate changing electrical currents and voltages that can cause EMI: ignition systems, cellular network of mobile phones, lightning, solar flares, and auroras (northern/southern lights). EMI frequently affects AM radios. It can also affect mobile phones, FM radios, and televisions, as well as observations for radio astronomy and atmospheric science. EMI can be used intentionally for radio jamming, as in electronic warfare. History Since the earliest days of ra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beechcraft King Air
The Beechcraft King Air is a line of American utility aircraft produced by Beechcraft. The King Air line comprises a number of twin-turboprop models that have been divided into two families. The Model 90 and 100 series developed in the 1960s are known as King Airs, while the later T-tail Model 200 and 300 series were originally marketed as Super King Airs, with the name "Super" being dropped by Beechcraft in 1996 (although it is still often used to differentiate the 200 and 300 series King Airs from their smaller stablemates). The King Air was the first aircraft in its class and was produced continuously from 1964 to 2021. It outsold all of its turboprop competitors combined. It has recently faced competition from jet aircraft such as the Embraer Phenom 100, Honda HA-420 HondaJet and Cessna Citation Mustang; as well as from newer turboprop aircraft including the Piaggio P180 Avanti, and single-engine Piper Malibu Meridian, Pilatus PC-12, and Socata TBM. Development Mod ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1st Signal Brigade (United States)
First or 1st is the ordinal form of the number one (#1). First or 1st may also refer to: *World record, specifically the first instance of a particular achievement Arts and media Music * 1$T, American rapper, singer-songwriter, DJ, and record producer Albums * ''1st'' (album), a 1983 album by Streets * ''1st'' (Rasmus EP), a 1995 EP by The Rasmus, frequently identified as a single * '' 1ST'', a 2021 album by SixTones * ''First'' (Baroness EP), an EP by Baroness * ''First'' (Ferlyn G EP), an EP by Ferlyn G * ''First'' (David Gates album), an album by David Gates * ''First'' (O'Bryan album), an album by O'Bryan * ''First'' (Raymond Lam album), an album by Raymond Lam * ''First'', an album by Denise Ho Songs * "First" (Cold War Kids song), a song by Cold War Kids * "First" (Lindsay Lohan song), a song by Lindsay Lohan * "First", a song by Everglow from ''Last Melody'' * "First", a song by Lauren Daigle * "First", a song by Niki & Gabi * "First", a song by Jonas Brot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
De Havilland Canada DHC-3 Otter
The de Havilland Canada DHC-3 Otter is a single-engined, high-wing, propeller-driven, short take-off and landing ( STOL) aircraft developed by de Havilland Canada. It was conceived to be capable of performing the same roles as the earlier and highly successful Beaver, including as a bush plane, but is overall a larger aircraft. Design and development The rugged single-engined, high-wing, propeller-driven DHC-3 Otter was conceived in January 1951 by de Havilland Canada as a larger, more powerful version of its highly successful DHC2 Beaver STOL utility transport. Dubbed the "King Beaver" during design, it would be the veritable "one-ton truck" to the Beaver's "half-ton" role. The Otter received Canadian certification in November 1952 and entered production shortly thereafter. Using the same overall configuration as the Beaver, the new, much heavier design incorporated a longer fuselage, greater-span wing, and cruciform tail. Seating in the main cabin expanded from six to 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Air Force
The United States Air Force (USAF) is the air service branch of the United States Armed Forces, and is one of the eight uniformed services of the United States. Originally created on 1 August 1907, as a part of the United States Army Signal Corps, the USAF was established as a separate branch of the United States Armed Forces in 1947 with the enactment of the National Security Act of 1947. It is the second youngest branch of the United States Armed Forces and the fourth in order of precedence. The United States Air Force articulates its core missions as air supremacy, global integrated intelligence, surveillance and reconnaissance, rapid global mobility, global strike, and command and control. The United States Air Force is a military service branch organized within the Department of the Air Force, one of the three military departments of the Department of Defense. The Air Force through the Department of the Air Force is headed by the civilian Secretary of the Air Force ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
De Havilland Canada DHC-4 Caribou
The de Havilland Canada DHC-4 Caribou (designated by the United States military as the CV-2 and later C-7 Caribou) is a Canadian specialized cargo aircraft with short takeoff and landing (STOL) capability. The Caribou was first flown in 1958 and although mainly retired from military operations, is still in use in small numbers as a rugged "bush" aircraft. The design was further developed as the de Havilland Canada DHC-5 Buffalo, adding turboprop engines and other changes that further improved its short-field performance to the point where it competes with light aircraft even with a full load. Design and development The de Havilland Canada company's third STOL design was a big increase in size compared to its earlier DHC Beaver and DHC Otter, and was the first DHC design powered by two engines. The Caribou was similar in concept in that it was designed as a rugged STOL utility aircraft. The Caribou was primarily a military tactical transport that in commercial service foun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Khe Sanh
Khe Sanh is the district capital of Hướng Hoá District, Quảng Trị Province, Vietnam, located 63 km west of Đông Hà. During the Vietnam War, the Khe Sanh Combat Base was located to the north of the city. The Battle of Khe Sanh The Battle of Khe Sanh (21 January – 9 July 1968) was conducted in the Khe Sanh area of northwestern Quảng Trị Province, Republic of Vietnam (South Vietnam), during the Vietnam War. The main US forces defending Khe Sanh Combat Base (KSCB) ... took place there. The Khe Sanh Combat Base is a museum where relics of the war are exhibited. Most of the former base is now overgrown by wilderness or coffee and banana plants. References Communes of Quảng Trị province District capitals in Vietnam Townships in Vietnam {{QuangTri-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cambodia
Cambodia (; also Kampuchea ; km, កម្ពុជា, UNGEGN: ), officially the Kingdom of Cambodia, is a country located in the southern portion of the Indochinese Peninsula in Southeast Asia, spanning an area of , bordered by Thailand to the northwest, Laos to the north, Vietnam to the east, and the Gulf of Thailand to the southwest. The capital and largest city is Phnom Penh. The sovereign state of Cambodia has a population of over 17 million. Buddhism is enshrined in the constitution as the official state religion, and is practised by more than 97% of the population. Cambodia's minority groups include Vietnamese, Chinese, Chams and 30 hill tribes. Cambodia has a tropical monsoon climate of two seasons, and the country is made up of a central floodplain around the Tonlé Sap lake and Mekong Delta, surrounded by mountainous regions. The capital and largest city is Phnom Penh, the political, economic and cultural centre of Cambodia. The kingdom is an elective co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
