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Multiple Satellite Imaging
Multiple satellite imaging is the process of using multiple satellites to gather more information than a single satellite so that a better estimate of the desired source is possible. So something that cannot be seen with one telescope might be visible with two or more telescopes. Background Interferometry is the process of combining waves in such a way that they constructively interfere. When two or more independent sources detect a signal at the same given frequency those signals can be combined and the result is better than each one individually. An overview of Astronomical interferometers and a History of astronomical interferometry can be referenced from their respective pages. The NASA Origins Program was created in the 1990s to ultimately search for the origin of the universe. The theory that the Origins Program is based on is: since light travels at a constant speed until it is absorbed by something; there is still light that was part of the first light ever created tr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SIM Concept2006
Sim or SIM may refer to: Computing and technology *SIM card or Subscriber Identity Module, used by mobile telephones *HP Systems Insight Manager, a system management tool * Scientific instrument module in the Apollo command and service module *Security information management in computer security * Selected ion monitoring, a mass spectrometry scanning mode *Computer simulation *Space Interferometry Mission, cancelled by NASA * Organizations *''Service de sécurité incendie de Montréal'' * Scuola Italiana di Montevideo, the Italian day school of Montevideo, Uruguay *Serving In Mission (formerly Sudan Interior Mission), a Christian mission organization *''Servicio de Inteligencia Militar'', a former Dominican intelligence service *'' Servicio de investigación Militar'', a former Spanish military intelligence service *''Servizio Informazioni Militari'', a former Italian military intelligence service *Singapore Institute of Management * Society for Industrial Microbiology and Biot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Image Processing
An image is a visual representation of something. It can be two-dimensional, three-dimensional, or somehow otherwise feed into the visual system to convey information. An image can be an artifact, such as a photograph or other two-dimensional picture, that resembles a subject. In the context of signal processing, an image is a distributed amplitude of color(s). In optics, the term “image” may refer specifically to a 2D image. An image does not have to use the entire visual system to be a visual representation. A popular example of this is of a greyscale image, which uses the visual system's sensitivity to brightness across all wavelengths, without taking into account different colors. A black and white visual representation of something is still an image, even though it does not make full use of the visual system's capabilities. Images are typically still, but in some cases can be moving or animated. Characteristics Images may be two or three- dimensional, such as a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robyn Owens
Robyn Anne Owens is an Australian applied mathematician and computer scientist known for her research in computer vision and face recognition, and on the non-invasive imaging of lactation. Formerly a professor at the University of Western Australia (UWA) and the deputy vice-chancellor for research at UWA, she retired in 2019, and remains affiliated with UWA as a professorial fellow. Education and career Owens earned a bachelor's degree in mathematics (with honours) at the University of Western Australia and a doctorate in mathematics at the Somerville College, Oxford. Her 1980 dissertation, ''Almost Periodic Hardy Spaces'', was supervised by David Albert Edwards. She returned to the University of Western Australia after postdoctoral study at Paris-Sud University. Before becoming vice-chancellor for research, she headed the UWA School of Computer Science & Software Engineering. Recognition With her co-author Peter E. Hartmann, she was a winner of the 2010 Rank Prize in Nutrition, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pierre-Michel Duffieux
Pierre-Michel Duffieux (1891–1976) was a French physicist, known as the founder of Fourier optics. Life and career Duffieux became interested in physics by listening to the lectures of Pierre Duhem in high school in Bordeaux. In 1912 he entered the École Normale Supérieure. During the first world war he was involved in military work under the supervision of Henri Bénard, applying Fourier methods to measuring the coefficients of thermal conductivity. This work resulted in his first scientific publication. In 1920 Duffieux became an assistant of Charles Fabry in Marseille, earning his doctorate in 1925 with a thesis on band spectroscopy. Afterward he worked in interference spectroscopy, moving to Rennes in 1927. During World War II Duffieux discovered Fourier optics, presenting his ideas at a meeting of the French Society of Physics in Paris Paris () is the capital and most populous city of France, with an estimated population of 2,165,423 residents in 2019 in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Terrestrial Planet Finder
The Terrestrial Planet Finder (TPF) was a proposed project by NASA to construct a system of space telescopes for detecting extrasolar terrestrial planets. TPF was postponed several times and finally cancelled in 2011. There were two telescope systems under consideration, the TPF-I, which had several small telescopes, and TPF-C, which used one large telescope. History In May 2002, NASA chose two TPF mission architecture concepts for further study and technology development. Each would use a different means to achieve the same goal—to block the light from a parent star in order to see its much smaller, dimmer planets. The technological challenge of imaging planets near their much brighter star has been likened to finding a firefly near the beam of a distant searchlight. Additional goals of the mission would include the characterization of the surfaces and atmospheres of newfound planets, and looking for the chemical signatures of life. The two planned architectures were: *I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Project Prometheus
Project Prometheus (also known as Project Promethian) was established in 2003 by NASA to develop nuclear-powered systems for long-duration space missions. This was NASA's first serious foray into nuclear spacecraft propulsion since the cancellation of the SNTP project in 1995. The project was planned to design, develop, and fly multiple deep space missions to the outer planets. The project was cancelled in 2005, due to other demands on NASA's budget. Its budget shrank from $252.6 million in 2005 to only $100 million in 2006, $90 million of which was for closeout costs on cancelled contracts. Namesake Originally named the "Nuclear Systems Initiative", Project Prometheus was named for the wisest of the Titans in Greek mythology who gave the gift of fire to humanity. NASA said the name ''Prometheus'' indicates its hopes of establishing a new tool for understanding nature and expanding capabilities for the exploration of the Solar System. Motivations Due to their distance from the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vision For Space Exploration
Vision, Visions, or The Vision may refer to: Perception Optical perception * Visual perception, the sense of sight * Visual system, the physical mechanism of eyesight * Computer vision, a field dealing with how computers can be made to gain understanding from digital images or videos * Machine vision, technology for imaging-based automatic inspection Perception of the future * Foresight (psychology), in business, the ability to envisage future market trends and plan accordingly * Goal, a desired result ** Vision statement, a declaration of objectives to guide decision-making Other perceptions * Vision (spirituality), a supernatural experience that conveys a revelation * Hallucination, a perception of something that does not exist Arts and media Events * Visions (convention), a science fiction event * Vision Festival, a New York City art festival Film and television * "The Vision", episode of '' Alcoa Presents: One Step Beyond'' * ''The Vision'' (film), 1998 British telev ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atmosphere
An atmosphere () is a layer of gas or layers of gases that envelop a planet, and is held in place by the gravity of the planetary body. A planet retains an atmosphere when the gravity is great and the temperature of the atmosphere is low. A stellar atmosphere is the outer region of a star, which includes the layers above the opaque photosphere; stars of low temperature might have outer atmospheres containing compound molecules. The atmosphere of Earth is composed of nitrogen (78%), oxygen (21%), argon (0.9%), carbon dioxide (0.04%) and trace gases. Most organisms use oxygen for respiration; lightning and bacteria perform nitrogen fixation to produce ammonia that is used to make nucleotides and amino acids; plants, algae, and cyanobacteria use carbon dioxide for photosynthesis. The layered composition of the atmosphere minimises the harmful effects of sunlight, ultraviolet radiation, the solar wind, and cosmic rays to protect organisms from genetic damage. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Satellites
A satellite or artificial satellite is an object intentionally placed into orbit in outer space. Except for passive satellites, most satellites have an electricity generation system for equipment on board, such as solar panels or radioisotope thermoelectric generators (RTGs). Most satellites also have a method of communication to ground stations, called transponders. Many satellites use a standardized bus to save cost and work, the most popular of which is small CubeSats. Similar satellites can work together as a group, forming constellations. Because of the high launch cost to space, satellites are designed to be as lightweight and robust as possible. Most communication satellites are radio relay stations in orbit and carry dozens of transponders, each with a bandwidth of tens of megahertz. Satellites are placed from the surface to orbit by launch vehicles, high enough to avoid orbital decay by the atmosphere. Satellites can then change or maintain the orbit by propulsion ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
