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SCR-270
The SCR-270 (Set Complete Radio model 270) was one of the first operational early-warning radars. It was the U.S. Army's primary long-distance radar throughout World War II and was deployed around the world. It is also known as the Pearl Harbor Radar, since it was an SCR-270 set that detected the incoming raid about 45 minutes before the December 7, 1941, attack on Pearl Harbor commenced. Two versions were produced, the mobile SCR-270, and the fixed SCR-271 which used the same electronics but used an antenna with somewhat greater resolution. An upgraded version, the SCR-289 radar, SCR-289, was also produced, but saw little use. The -270 versions were eventually replaced by newer microwave units based on cavity magnetron that was introduced to the US during the Tizard Mission. The only early warning system of the sort to see action in World War II was the AN/CPS-1, which was available in mid-1944, in time for D-day. Building of the radar The Signal Corps (United States Army), S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Early-warning Radar
An early-warning radar is any radar system used primarily for the long-range detection of its targets, i.e., allowing defences to be alerted as ''early'' as possible before the intruder reaches its target, giving the air defences the maximum time in which to operate. This contrasts with systems used primarily for tracking or gun laying, which tend to offer shorter ranges but offer much higher accuracy. EW radars tend to share a number of design features that improve their performance in the role. For instance, EW radar typically operates at lower frequencies, and thus longer wavelengths, than other types. This greatly reduces their interaction with rain and snow in the air, and therefore improves their performance in the long-range role where their coverage area will often include precipitation. This also has the side-effect of lowering their optical resolution, but this is not important in this role. Likewise, EW radars often use much lower pulse repetition frequency to maximi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Signal Corps (United States Army)
) , colors = Orange and white , colors_label = Corps colors , march = , mascot = , equipment = , equipment_label = , battles = , anniversaries = 21 June 1860 , decorations = , battle_honours = , notable_commanders = BG Albert J. Myer BG Adolphus Greely , identification_symbol = , identification_symbol_label = Branch insignia , identification_symbol_2 = , identification_symbol_2_label = Regimental insignia , current_commander = , current_commander_label = , ceremonial_chief = Colonel Paul D. Howard , ceremonial_chief_label = Chief of Signal , command_sergeant_major = CSM Darien D. Lawshea , command_sergeant_major_label = Sergeant Major of the Regiment The United States Army Signal Corps (U ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chief Signal Officer
The United States Army Signal Corps (USASC) is a branch of the United States Army that creates and manages communications and information systems for the command and control of combined arms forces. It was established in 1860, the brainchild of Major (United States)#American Civil War, Major Albert J. Myer, and had an important role in the American Civil War. Over its history, it had the initial responsibility for portfolios and new technologies that were eventually transferred to other U.S. government entities. Such responsibilities included Defense Intelligence Agency, military intelligence, National Weather Service#History, weather forecasting, and Aeronautical Division, U.S. Signal Corps, aviation. Mission statement Support for the command and control of combined arms forces. Signal support includes network operations (information assurance, information dissemination management, and network management) and management of the electromagnetic spectrum. Signal support encompasses a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Attack On Pearl Harbor
The attack on Pearl HarborAlso known as the Battle of Pearl Harbor was a surprise military strike by the Imperial Japanese Navy Air Service upon the United States against the naval base at Pearl Harbor in Honolulu, Territory of Hawaii, just before 8:00a.m. (local time) on Sunday, December 7, 1941. The United States was a neutral country at the time; the attack led to its formal entry into World War II the next day. The Japanese military leadership referred to the attack as the Hawaii Operation and Operation AI, and as Operation Z during its planning. Japan intended the attack as a preventive action. Its aim was to prevent the United States Pacific Fleet from interfering with its planned military actions in Southeast Asia against overseas territories of the United Kingdom, the Netherlands, and those of the United States. Over the course of seven hours there were coordinated Japanese attacks on the US-held Philippines, Guam, and Wake Island and on the British ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fort Sherman
Fort Sherman is a former United States Army base in Panama, located on Toro Point at the Caribbean (northern) end of the Panama Canal, on the western bank of the Canal directly opposite Colón, Panama, Colón (which is on the eastern bank). It was the primary defensive base for the Caribbean sector of the Canal, and was also the center for US jungle warfare training for some time. Its Pacific-side partner was Fort Amador. Both bases were turned over to Panama in 1999. History Concurrent with the Canal construction a number of defensive locations were developed to protect it, both with coastal defense guns, as well as military bases to defend against a direct infantry assault. Fort Sherman was the primary Caribbean-side infantry base, while Fort Amador protected the Pacific side. Construction of Fort Sherman began in January 1912 as a phase of the original 1910 defensive plans. Fort Sherman was named by War Department General Order No. 153 dated November 24, 1911, in honor of Gen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CXAM Radar
The CXAM radar system was the first production radar system deployed on United States Navy ships, operating in the mid-high VHF frequency band of 200 MHz. It followed several earlier prototype systems, such as the NRL radar installed in April 1937 on the destroyer ; its successor, the XAF, installed in December 1938 on the battleship ; and the first RCA-designed system, the CXZ, installed in December 1938 or January 1939 on the battleship . Based on testing in January 1939, where the XAF was more reliable, the US Navy ordered RCA to build six XAF-based units for deployment and then shortly thereafter ordered 14 more. The first six units RCA produced (delivered in 1940) were denoted "CXAM" and were a fusion of XAF and CXZ technologies. These were installed on the battleship , the aircraft carrier (in September 1940), and the heavy cruisers , , , and . The next 14 units RCA produced (also delivered in 1940) were denoted "CXAM-1" and were slight improvements over the CXAM desig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AN/CPS-1
The AN/CPS-1, also known as the Microwave Early Warning (MEW) radar, was a semi-mobile, S band, early-warning radar developed by the MIT Radiation Laboratory during World War II. It was one of the first projects attempted by the Lab and was intended to build equipment to transition from the British long-wave radar to the new microwave centimeter-band radar made possible by the cavity magnetron. This project, led by Luis Walter Alvarez, became the world's first microwave phased-array antenna. Deployed to the European Theater in 1944, the MEW proved to be an extremely effective radar against German V-1 flying bombs and V-2 rockets. After the war, the AN/CPS-1 was adopted for use by civil aviation becoming the first radar used to track aircraft on civil air routes in the United States. Background In 1940, Vannevar Bush, head of the National Defense Research Committee, established the "Microwave Committee" (section D-1) and the "Fire Control" division (D-2) to develop a more advance ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States
The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territories, nine Minor Outlying Islands, and 326 Indian reservations. The United States is also in free association with three Pacific Island sovereign states: the Federated States of Micronesia, the Marshall Islands, and the Republic of Palau. It is the world's third-largest country by both land and total area. It shares land borders with Canada to its north and with Mexico to its south and has maritime borders with the Bahamas, Cuba, Russia, and other nations. With a population of over 333 million, it is the most populous country in the Americas and the third most populous in the world. The national capital of the United States is Washington, D.C. and its most populous city and principal financial center is New York City. Paleo-Americ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Panama Canal Zone
The Panama Canal Zone ( es, Zona del Canal de Panamá), also simply known as the Canal Zone, was an unincorporated territory of the United States, located in the Isthmus of Panama, that existed from 1903 to 1979. It was located within the territory of Panama, consisting of the Panama Canal and an area generally extending on each side of the centerline, but excluding Panama City and Colón. Its capital was Balboa. The Panama Canal Zone was created on November 18, 1903 from the territory of Panama; established with the signing of the Hay–Bunau-Varilla Treaty, which allowed for the construction of the Panama Canal within the territory by the United States. The zone existed until October 1, 1979, when it was incorporated back into Panama. In 1904, the Isthmian Canal Convention was proclaimed. In it, the Republic of Panama granted to the United States in perpetuity the use, occupation, and control of a zone of land and land underwater for the construction, maintenance, oper ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henry H
Henry may refer to: People *Henry (given name) * Henry (surname) * Henry Lau, Canadian singer and musician who performs under the mononym Henry Royalty * Portuguese royalty ** King-Cardinal Henry, King of Portugal ** Henry, Count of Portugal, Henry of Burgundy, Count of Portugal (father of Portugal's first king) ** Prince Henry the Navigator, Infante of Portugal ** Infante Henrique, Duke of Coimbra (born 1949), the sixth in line to Portuguese throne * King of Germany ** Henry the Fowler (876–936), first king of Germany * King of Scots (in name, at least) ** Henry Stuart, Lord Darnley (1545/6–1567), consort of Mary, queen of Scots ** Henry Benedict Stuart, the 'Cardinal Duke of York', brother of Bonnie Prince Charlie, who was hailed by Jacobites as Henry IX * Four kings of Castile: ** Henry I of Castile ** Henry II of Castile **Henry III of Castile Henry III of Castile (4 October 1379 – 25 December 1406), called the Suffering due to his ill health (, ), was the s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fort Hancock, New Jersey
Fort Hancock is a former United States Army fort at Sandy Hook in Middletown Township New Jersey. The coastal artillery base defended the Atlantic coast and the entrance to New York Harbor, with its first gun batteries operational in 1896. The fort served from then until 1950 as part of the Harbor Defenses of New York and predecessor organizations. Between 1874 and 1919, the adjacent US Army Sandy Hook Proving Ground was operated in conjunction with Fort Hancock. It is now part of Fort Hancock Memorial Park. It was preceded by the Fort at Sandy Hook, built 1857–1867 and demolished beginning in 1885. The Sandy Hook Light, built in 1764 and the oldest working lighthouse in the United States, is located on the grounds of Fort Hancock.Roberts, pp. 516-518 History Fort at Sandy Hook The Sandy Hook area was first fortified as part of the third system of US fortifications. Construction on the Fort at Sandy Hook began in 1857 and ceased in 1867, with the fort serviceable though la ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sandy Hook (New Jersey)
Sandy Hook is a barrier spit in Middletown Township, Monmouth County, New Jersey, United States. The barrier spit, approximately in length and varying from wide, is located at the north end of the Jersey Shore. It encloses the southern entrance of Lower New York Bay south of New York City, protecting it from the open waters of the Atlantic Ocean to the east. The Dutch called the area "Sant Hoek", with the English "Hook" deriving from the Dutch "Hoek" (corner, angle), meaning "spit of land". For over three centuries mariners tasked with guiding ships across the Sandy Hook bar have been known as Sandy Hook pilots. Most of Sandy Hook is owned and managed by the National Park Service as the Sandy Hook Unit of Gateway National Recreation Area. Description Geologically, Sandy Hook is a large sand spit or barrier spit, the extension of a barrier peninsula along the coast of New Jersey, separated from the mainland by the estuary of the Shrewsbury River. On its western side, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
