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SCR-270
The SCR-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 7 December 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, 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 had been experimenting with some radar concepts as early as the l ... [...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] |
SCR-268 Radar
The SCR-268 (for ''Signal Corps Radio no. 268'') was the United States Army's first radar system. Introduced in 1940, it was developed to provide accurate aiming information for antiaircraft artillery and was also used for gun laying systems and directing searchlights against aircraft. The radar was widely utilized by both Army and United States Marine Corps, Marine Corps air defense and early warning units during World War II. By the end of World War II the system was already considered out of date, having been replaced by the much smaller and more accurate SCR-584 microwave-based system. Development The Signal Corps (United States Army), Signal Corps had been experimenting with some radar concepts as early as the late 1920s, under the direction of Colonel William R. Blair, director of the Signal Corps Laboratories at Fort Monmouth, New Jersey. While most of the Corps' efforts revolved around infra-red detection systems (a popular idea at the time), as well as a newer genera ... [...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 responsible for creating and managing communications and information systems for the command and control of combined arms forces. It was established in 1860 by Major Albert J. Myer and played a significant role during the American Civil War. It has the initial responsibility for portfolios and new technologies that are eventually transferred to other U.S. government entities. Such responsibilities included military intelligence, weather forecasting, and 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 all aspects of designing, installing, data communications networks that employ single and multi-channel satellite, tropospheric scatter, terrestrial microwav ... [...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 Empire of Japan on the United States Pacific Fleet at Naval Station Pearl Harbor, its naval base at Pearl Harbor on Oahu, Territory of Hawaii, Hawaii, on December 7, 1941. At the time, the U.S. was a Neutral powers during World War II, neutral country in World War II. The air raid on Pearl Harbor, which was launched from Aircraft carrier, aircraft carriers, resulted in the U.S. entering the war on the side of the Allies of World War II, Allies on the day following the attack. The Imperial General Headquarters, Japanese military leadership referred to the attack as the Hawaii Operation and Operation AI, and as Operation Z during its planning. The attack on Pearl Harbor was preceded by months of negotiations between the U.S. and Japan over the future of the Pacific Ocean, Pacific. Japanese demands included that the U.S. ABCD line, end its sanctions against Japan, cease aidi ... [...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 Ge ... [...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 de ... [...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. The project was led by Luis Walter Alvarez. 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. The designation "CPS" under the JETDS system means “Fixed, Radar, Search” electronic device. Background In 1940, Vannevar Bush, head of the National Defense Research Committee, established the "Microwave Committee" (section D-1) and the "Fire Contro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States
The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 contiguous states border Canada to the north and Mexico to the south, with the semi-exclave of Alaska in the northwest and the archipelago of Hawaii in the Pacific Ocean. The United States asserts sovereignty over five Territories of the United States, major island territories and United States Minor Outlying Islands, various uninhabited islands in Oceania and the Caribbean. It is a megadiverse country, with the world's List of countries and dependencies by area, third-largest land area and List of countries and dependencies by population, third-largest population, exceeding 340 million. Its three Metropolitan statistical areas by population, largest metropolitan areas are New York metropolitan area, New York, Greater Los Angeles, Los Angel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henry H
Henry may refer to: People and fictional characters * Henry (given name), including lists of people and fictional characters * Henry (surname) * Henry, a stage name of François-Louis Henry (1786–1855), French baritone Arts and entertainment * Henry (2011 film), ''Henry'' (2011 film), a Canadian short film * Henry (2015 film), ''Henry'' (2015 film), a virtual reality film * ''Henry: Portrait of a Serial Killer'', a 1986 American crime film * Henry (comics), ''Henry'' (comics), an American comic strip created in 1932 by Carl Anderson * "Henry", a song by New Riders of the Purple Sage Places Antarctica * Henry Bay, Wilkes Land Australia *Henry River (New South Wales) *Henry River (Western Australia) Canada * Henry Lake (Vancouver Island), British Columbia * Henry Lake (Halifax County), Nova Scotia * Henry Lake (District of Chester), Nova Scotia New Zealand * Lake Henry (New Zealand) * Henry River (New Zealand) United States * Henry, Illinois * Henry, Indiana * Henry, Nebras ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Panama Canal Zone
The Panama Canal Zone (), also known as just the Canal Zone, was a International zone#Concessions, concession of the United States located in the Isthmus of Panama that existed from 1903 to 1979. It consisted of the Panama Canal and an area generally extending on each side of the centerline, but excluding Panama City and Colón, Panama, Colón. Its capital was Balboa, Panama, Balboa. The Panama Canal Zone was created on November 18, 1903, from the Separation of Panama from Colombia, territory of Panama; it was 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 Commission, 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fort Hancock, New Jersey
Fort Hancock is a former United States Army fort at Sandy Hook, New Jersey, Sandy Hook in Middletown Township, New Jersey, Middletown Township, New Jersey. The coastal artillery base defended the East Coast of the United States, 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 Seacoast defense in the United States, third system of U ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
