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The Marshall Space Flight Center (MSFC) is the U.S. government's civilian rocketry and spacecraft propulsion research center. The largest NASA center, MSFC's first mission was developing the Saturn launch vehicles for the Apollo moon program. Marshall has been the agency's lead center for Space Shuttle propulsion and its external tank; payloads and related crew training; International Space Station (ISS) design and assembly; and computers, networks, and information management. Located on the Redstone Arsenal near Huntsville, Alabama, MSFC is named in honor of General of the Army George Marshall. The center also contains the Huntsville Operations Support Center (HOSC), a facility that supports ISS launch, payload and experiment activities at the Kennedy Space Center. The HOSC also monitors rocket launches from Cape Canaveral Air Force Station when a Marshall Center payload is on board. ==History== After the end of the war with Germany in May 1945, a program was initiated to bring to the United States a number of scientist and engineers who had been at the center of Germany's advanced military technologies. The largest and best-known activity was called Operation Paperclip. In August 1945, 127 missile specialists led by Wernher von Braun signed work contracts with the U.S. Army's Ordnance Corps. Most of them had worked on the V-2 missile development under von Braun at Peenemünde. Von Braun and the other Germans were sent to Fort Bliss, Texas, joining the Army's newly formed Research and Development Division Sub-office (Rocket). For the next five years, von Braun and the German scientists and engineers were primarily engaged in adapting and improving the V-2 missile for U.S. applications; testing was conducted at nearby White Sands Proving Grounds, New Mexico. Von Braun had long had a great interest in rocketry for space science and exploration. Toward this, he was allowed to use a WAC Corporal rocket as a second stage for a V-2; the combination, called Bumper, reached a record-breaking altitude.〔Fidenbach, Peter L.; ("A Brief History of White Sands Proving Ground" ), N.M. State Univ.〕 During World War II, the production and storage of ordnance shells was conducted by three arsenals nearby to Huntsville, Alabama. After the war, these were mainly closed, and the three areas were combined to form Redstone Arsenal. In October 1948, the Chief of Ordnance designated Redstone Arsenal as the center of research and development activities in free-flight rockets and related items, and the following June, the Ordnance Rocket Center was opened. A year later, the Secretary of the Army approved the transfer of the rocket research and development activities from Fort Bliss to the new center at Redstone Arsenal. Beginning in April 1950, about 1,000 persons were involved in the transfer, including von Braun's group. At this time, R&D responsibility for guided missiles was added, and studies began on a medium-range guided missile that eventually became the Redstone rocket. Over the next decade, the missile development on Redstone Arsenal greatly expanded. Many small free-flight and guided rockets were developed, and work on the Redstone rocket got underway. Although this rocket was primarily intended for military purposes, von Braun kept space firmly in his mind, and published a widely read article on this subject.〔Wernher von Braun; "Crossing the Last Frontier", ''Collier's Magazine'', March 22, 1952, pp. 24-29, 72, 74〕 In mid-1952, the Germans who had initially worked under individual contracts were converted to Civil Service employees, and in 1954-55, most became U.S. citizens. Von Braun was appointed Chief of the Guided Missile Development Division.〔("Redstone Arsenal Complex Chronology, Part II: Nerve Center of Army Missilery, 1950-62 - Section B: The ABMA/AOMC Era, 1956-62" ). Redstone Arsenal Historical Information. United States Army〕 In September 1954, von Braun proposed using the Redstone as the main booster of a multi-stage rocket for launching artificial satellites. A year later, a study for Project Orbiter was completed, detailing plans and schedules for a series of scientific satellites. The Army's official role in the U.S. space satellite program was delayed, however, after higher authorities elected to use the Vanguard rocket then being developed by the Naval Research Laboratory (NRL). In February 1956, the Army Ballistic Missile Agency (ABMA) was established; von Braun was the director of the Development Operations Division. One of the primary programs was a , single-stage missile that was started the previous year; intended for both the U.S. Army and U.S. Navy, this was designated the PGM-19 Jupiter. Guidance component testing for this Jupiter intermediate range ballistic missile (IRBM) began in March 1956 on a modified Redstone missile dubbed Jupiter A while re-entry vehicle testing began in September 1956 on a Redstone with spin-stabilized upper stages named Jupiter-C. The first Jupiter IRBM flight took place from Cape Canaveral in March 1957 with the first successful flight to full range on 31 May.〔James N. Gibson, ''Nuclear Weapons of the United States, An Illustrated History'', p. 167, Schiffer Publishing Ltd., Atglen, PA, 1996〕 Jupiter was eventually taken over by the U.S. Air Force. The ABMA developed Jupiter-C was composed of a Redstone rocket first stage and two upper stages for RV tests or three upper stages for Explorer satellite launches. ABMA had originally planned the 20 September 1956 flight as a satellite launch but, by direct intervention of Eisenhower, was limited to the use of 2 upper stages for an RV test flight traveling and attaining an altitude of . While the Jupiter C capability was such that it could have placed the fourth stage in orbit, that mission had been assigned to the NRL.〔("Data Sheet - Explorer-1 and Jupiter-C" ), Dept. of Astronautics, National Air and Space Museum, Smithsonian Institution;〕〔A. E. Wolfe and W. J. Truscott, ''Juno Final Report Volume 1, Juno 1: Re-entry Test Vehicles and Explorer Satellites'', JPL, 1960〕 Later Jupiter-C flights would be use to launch satellites. The Soviet Union launched Sputnik 1, the first man-made earth satellite, on October 4, 1957. This was followed on November 3 with the second satellite, Sputnik 2. The United States attempted a satellite launch on December 6, using the NRL's Vanguard rocket, but it barely struggled off the ground, then fell back and exploded. On January 31, 1958, after finally receiving permission to proceed, von Braun and the ABMA space development team used a Jupiter C in a Juno I configuration (addition of a fourth stage) to successfully place Explorer 1, the first American satellite, into orbit around the earth. Effective at the end of March 1958, the U.S. Army Ordnance Missile Command (AOMC), was established at Redstone Arsenal. This encompassed the ABMA and its newly operational space programs. In August, AOMC and Advanced Research Projects Agency (ARPA, a Department of Defense organization) jointly initiated a program managed by ABMA to develop a large space booster of approximately 1.5-million-pounds.thrust using a cluster of available rocket engines. In early 1959, this vehicle was designated Saturn. On April 2, President Dwight D. Eisenhower recommended to Congress that a civilian agency be established to direct nonmilitary space activities, and on July 29, the President signed the National Aeronautics and Space Act, creating the National Aeronautics and Space Administration (NASA). The nucleus for forming NASA was the National Advisory Committee for Aeronautics (NACA), with its 7,500 employees and Ames Research Center (ARC), Langley Research Center (LaRC), and Lewis Flight Propulsion Laboratory (later LRC, then Glenn RC) becoming the initial operations of NASA. Although there was then an official space agency, the Army continued with certain far-reaching space programs. In June 1959, a secret study on Project Horizon was completed by ABMA, detailing plans for using the Saturn booster in establishing a manned Army outpost on the moon. Project Horizon, however, was rejected, and the Saturn program was transferred to NASA. The U.S. manned satellite space program, using the Redstone as a booster, was officially named Project Mercury on November 26, 1958. With a future goal of manned flight, monkeys Able and Baker were the first living creatures recovered from outer space on May 28, 1959. They had been carried in the nose cone on a Jupiter missile to an altitude of and a distance of , successfully withstanding 38 times the normal pull of gravity. Their survival during speeds over 10,000 miles per hour was America's first biological step toward putting a man into space. On October 21, 1959, President Eisenhower approved the transfer of all Army space-related activities to NASA. This was accomplished effective July 1, 1960, when 4,670 civilian employees, about $100 million worth of buildings and equipment, and of land transferred from AOMC/ABMA to NASA's George C. Marshall Space Flight Center. MSFC officially opened at Redstone Arsenal on this same date, then was dedicated on September 8 by President Eisenhower in person. The Center was named in honor of General of the Army George C. Marshall, Army Chief of Staff during World War II, United States Secretary of State, and Nobel Prize winner for his world-renowned Marshall Plan. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Marshall Space Flight Center」の詳細全文を読む スポンサード リンク
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