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Future Imagery Architecture
Future Imagery Architecture (FIA) was a program awarded to Boeing to design a new generation of optical and radar imaging US reconnaissance satellites for the National Reconnaissance Office (NRO). In 2005 NRO director Donald Kerr recommended the project's termination, and the optical component of the program was finally cancelled in September 2005 by Director of National Intelligence John Negroponte. FIA has been called by ''The New York Times'' "perhaps the most spectacular and expensive failure in the 50-year history of American spy satellite projects." Despite the optical component's cancellation, the radar component, known as Topaz, has continued, with four satellites in orbit . History Contractors In May 1999 Raytheon was awarded the contract for the deployment and integration of the ground infrastructure portion of FIA, the Mission Integration and Development (MIND) Program. In September 1999 the contract for the development, launch integration, and operations of FIA w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Van Allen Radiation Belt
The Van Allen radiation belt is a zone of energetic charged particles, most of which originate from the solar wind, that are captured by and held around a planet by that planet's magnetosphere. Earth has two such belts, and sometimes others may be temporarily created. The belts are named after James Van Allen, who published an article describing the belts in 1958. Earth's two main belts extend from an altitude of about above the surface, in which region radiation levels vary. The belts are in the inner region of Earth's magnetic field. They trap energetic electrons and protons. Other nuclei, such as alpha particles, are less prevalent. Most of the particles that form the belts are thought to come from the solar wind while others arrive as cosmic rays. By trapping the solar wind, the magnetic field deflects those energetic particles and protects the atmosphere from destruction. The belts endanger satellites, which must have their sensitive components protected with adequat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cassegrain Reflector
The Cassegrain reflector is a combination of a primary concave mirror and a secondary convex mirror, often used in optical telescopes and Antenna (radio), radio antennas, the main characteristic being that the optical path folds back onto itself, relative to the optical system's primary mirror entrance aperture. This design puts the Focus (optics), focal point at a convenient location behind the primary mirror and the convex secondary adds a Telephoto lens, telephoto effect creating a much longer focal length in a mechanically short system. In a symmetrical Cassegrain both mirrors are aligned about the optical axis, and the primary mirror usually contains a hole in the center, thus permitting the light to reach an eyepiece, a camera, or an image sensor. Alternatively, as in many radio telescopes, the final focus may be in front of the primary. In an asymmetrical Cassegrain, the mirror(s) may be tilted to avoid obscuration of the primary or to avoid the need for a hole in the prima ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bruce A
The English language name Bruce arrived in Scotland with the Normans, from the place name Brix, Manche in Normandy, France, meaning "the willowlands". Initially promulgated via the descendants of king Robert the Bruce (1274−1329), it has been a Scottish surname since medieval times; it is now a common male given name. The variant ''Lebrix'' and ''Le Brix'' are French variations of the surname. Note: A few people are notable in more than one field, and therefore appear in more than one section. Arts and entertainment Film and television * Bruce Altman (born 1955), American actor * Bruce Baillie (1931–2020), American filmmaker * Bruce Bennett (1906–2007), American actor and athlete * Bruce Berman (born 1952), American film producer * Bruce Boa (1930–2004), Canadian actor * Bruce Boxleitner (born 1950), American actor * Bruce Campbell (born 1958), American actor, director, writer, producer and author * Bruce Conner (1933–2008), American artist and filmmaker * Br ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NASA
The National Aeronautics and Space Administration (NASA ) is an independent agencies of the United States government, independent agency of the federal government of the United States, US federal government responsible for the United States's civil list of government space agencies, space program, aeronautics research and outer space, space research. National Aeronautics and Space Act, Established in 1958, it succeeded the National Advisory Committee for Aeronautics (NACA) to give the American space development effort a distinct civilian orientation, emphasizing peaceful applications in space science. It has since led most of America's space exploration programs, including Project Mercury, Project Gemini, the 1968–1972 Apollo program missions, the Skylab space station, and the Space Shuttle. Currently, NASA supports the International Space Station (ISS) along with the Commercial Crew Program and oversees the development of the Orion (spacecraft), Orion spacecraft and the Sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2012 National Reconnaissance Office Space Telescope Donation To NASA
The 2012 National Reconnaissance Office space telescope donation to NASA was the declassification and donation to NASA of two identical space telescopes by the United States National Reconnaissance Office. The donation has been described by scientists as a substantial improvement over NASA's current Hubble Space Telescope. Although the telescopes themselves were given to NASA at no cost, the space agency must still pay for the cost of instruments and electronics for the telescopes, as well as the satellites to house them and the launch of the telescopes. On February 17, 2016, the Nancy Grace Roman Space Telescope (then known as the Wide Field Infrared Survey Telescope or WFIRST) was formally designated as a mission by NASA, predicated on using one of the space telescopes. Background While the Hubble Space Telescope of the National Aeronautics and Space Administration (NASA) has collected a large amount of astronomical data, has outlived all expectations, and has been described as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
KH-11 Kennen
The KH-11 KENNEN (later renamed CRYSTAL,p.199-200 then Evolved Enhanced CRYSTAL System, and codenamed 1010 and Key Hole) is a type of reconnaissance satellite first launched by the American National Reconnaissance Office (NRO) in December 1976. Manufactured by Lockheed Corporation, Lockheed in Sunnyvale, California, the KH-11 was the first American spy satellite to use Optoelectronics, electro-optical digital imaging, and to offer real-time optical observations. Later KH-11 satellites have been referred to by outside observers as KH-11B or KH-12, and by the names "Advanced KENNEN", "Improved Crystal" and "Ikon". Official budget documents refer to the latest generation of electro-optical satellites as ''Evolved Enhanced CRYSTAL System''. The Key Hole series was officially discontinued in favor of a random numbering scheme after repeated public references to KH-7 Gambit, KH-7 GAMBIT, KH-8 Gambit 3, KH-8 GAMBIT 3, KH-9 Hexagon, KH-9 HEXAGON, and KH-11 KENNEN satellites. The ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tiger Team
A tiger team is a team of specialists assembled to work on a specific goal, or to solve a particular problem. Origin of the term A 1964 paper entitled ''Program Management in Design and Development'' used the term ''tiger teams'' and defined it as "a team of undomesticated and uninhibited technical specialists, selected for their experience, energy, and imagination, and assigned to track down relentlessly every possible source of failure in a spacecraft subsystem or simulation".J. R. Dempsey, W. A. Davis, A. S. Crossfield, and Walter C. Williams, "Program Management in Design and Development," in Third Annual Aerospace Reliability and Maintainability Conference, Society of Automotive Engineers, 1964p. 7–8 https://doi.org/10.4271/640548. Walter C. Williams gave this definition in response to the question "How best can advancements in reliability/maintainability state-of-the-art be attained and used with compressed schedules?" Williams was an engineer at the Manned Spacecraft ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States House Permanent Select Committee On Intelligence
The United States House Permanent Select Committee on Intelligence (HPSCI), also known as the House Intelligence Committee, is a committee of the United States House of Representatives, currently chaired by Rick Crawford. It is the primary committee in the U.S. House of Representatives charged with the oversight of the United States Intelligence Community, though it does share some jurisdiction with other committees in the House, including the Armed Services Committee for some matters dealing with the Department of Defense and the various branches of the U.S. military. The committee was preceded by the Select Committee on Intelligence between 1975 and 1977. House Resolution 658 established the permanent select committee, which gave it status equal to a standing committee on July 14, 1977. Jurisdiction The committee oversees all or part of the following executive branch departments and agencies: History Prior to establishing the permanent select committee in 1977, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Los Angeles Times
The ''Los Angeles Times'' is an American Newspaper#Daily, daily newspaper that began publishing in Los Angeles, California, in 1881. Based in the Greater Los Angeles city of El Segundo, California, El Segundo since 2018, it is the List of newspapers in the United States, sixth-largest newspaper in the U.S. and the largest in the Western United States with a print circulation of 118,760. It has 500,000 online subscribers, the fifth-largest among U.S. newspapers. Owned by Patrick Soon-Shiong and published by California Times, the paper has won over 40 Pulitzer Prizes since its founding. In the 19th century, the paper developed a reputation for civic boosterism and opposition to Trade union, labor unions, the latter of which led to the Los Angeles Times bombing, bombing of its headquarters in 1910. The paper's profile grew substantially in the 1960s under publisher Otis Chandler, who adopted a more national focus. As with other regional newspapers in California and the United Sta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Control Moment Gyroscope
A control moment gyroscope (CMG) is an attitude control device generally used in spacecraft attitude control systems. A CMG consists of a spinning rotor and one or more motorized gimbals that tilt the rotor’s angular momentum. As the rotor tilts, the changing angular momentum causes a gyroscopic torque that rotates the spacecraft. Comparison with Reaction Wheels CMGs and reaction wheels are two common types of spacecraft attitude control actuators and serve the same function, though they differ in mechanics and performance characteristics. The latter apply torque simply by changing rotor spin speed, but the former tilt the rotor's spin axis without necessarily changing its spin speed. CMGs are more mechanically complex than reaction wheels and typically more expensive, but are far more power efficient. For a few hundred watts and about 100 kg of mass, large CMGs have produced thousands of newton meters of torque. A reaction wheel of similar capability would require meg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Application-specific Integrated Circuit
An application-specific integrated circuit (ASIC ) is an integrated circuit (IC) chip customized for a particular use, rather than intended for general-purpose use, such as a chip designed to run in a digital voice recorder or a high-efficiency video codec. #Application-specific standard product, Application-specific standard product chips are intermediate between ASICs and industry standard integrated circuits like the 7400 series or the 4000 series. ASIC chips are typically semiconductor device fabrication, fabricated using metal–oxide–semiconductor (MOS) technology, as MOS integrated circuit chips. As feature sizes have shrunk and Electronic design automation, chip design tools improved over the years, the maximum complexity (and hence functionality) possible in an ASIC has grown from 5,000 logic gates to over 100 million. Modern ASICs often include entire Central processing unit, microprocessors, memory blocks including Read-only memory, ROM, Random-access memory, RAM, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
