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Near Infrared Camera
NIRCam (Near-InfraRed Camera) is an instrument aboard the James Webb Space Telescope. It has two major tasks, as an imager from 0.6 to 5 μm wavelength, and as a wavefront sensor to keep the 18-section mirrors functioning as one. In other words, it is a camera and is also used to provide information to align the 18 segments of the primary mirror. It is an infrared camera with ten mercury-cadmium-telluride (HgCdTe) detector arrays, and each array has an array of 2048×2048 pixels. The camera has a field of view of 2.2×2.2 arcminutes with an angular resolution of 0.07 arcseconds at 2 μm. NIRCam is also equipped with coronagraphs, which helps to collect data on exoplanets near stars. It helps with imaging anything next to a much brighter object, because the coronagraph blocks that light. NIRCam is housed in the Integrated Science Instrument Module (ISIM). It is connected to the ISIM mechanically with a system of kinematic mounts in the structural form of strut ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
JWST Nircam1lwres
The James Webb Space Telescope (JWST) is a space telescope designed to conduct infrared astronomy. As the largest telescope in space, it is equipped with high-resolution and high-sensitivity instruments, allowing it to view objects too old, List of the most distant astronomical objects, distant, or faint for the Hubble Space Telescope. This enables investigations across many fields of astronomy and cosmology, such as observation of the Population III star, first stars and the Galaxy formation and evolution, formation of the first galaxies, and detailed atmospheric characterization of potentially habitable exoplanets. Although the Webb's mirror diameter is 2.7 times larger than that of the Hubble Space Telescope, it produces images of comparable optical resolution, resolution because it observes in the longer-wavelength infrared spectrum. The longer the wavelength of the spectrum, the larger the information-gathering surface required (mirrors in the infrared spectrum or antenna a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Digitization
Digitization is the process of converting information into a digital (i.e. computer-readable) format.Collins Dictionary. (n.d.). Definition of 'digitize'. Retrieved December 15, 2021, from https://www.collinsdictionary.com/dictionary/english/digitize The result is the representation of an object, image, sound, document, or signal (usually an analog signal) obtained by generating a series of numbers that describe a discrete set of points or samples. The result is called ''digital representation'' or, more specifically, a ''digital image'', for the object, and ''digital form'', for the signal. In modern practice, the digitized data is in the form of binary numbers, which facilitates processing by digital computers and other operations, but digitizing simply means "the conversion of analog source material into a numerical format"; the decimal or any other number system can be used instead. Digitization is of crucial importance to data processing, storage, and transmission, bec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Data Conditioning
Data conditioning is the use of data management and optimization techniques which result in the intelligent routing, optimization and protection of data for storage or data movement in a computer system. Data conditioning features enable enterprise and cloud data centers to dramatically improve system utilization and increase application performance lowering both capital expenditures and operating costs. Data conditioning technologies delivered through a Data Conditioning Platform optimize data as it moves through a computer’s I/O (Input/Output) path or I/O bus—the data path between the main processor complex and storage subsystems. The functions of a Data Conditioning Platform typically reside on a storage controller add-in card inserted into the PCI-e slots of a server. This enables easy integration of new features in a server or a whole data center. Data conditioning features delivered via a Data Conditioning Platform are designed to simplify system integration, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Temperature Control
Temperature control is a process in which change of temperature of a space (and objects collectively there within), or of a substance, is measured or otherwise detected, and the passage of heat energy into or out of the space or substance is adjusted to achieve a desired temperature. Thermoregulation is the act of keeping the body at a static and regulated temperature that is suitable for the host despite the external temperature conditions. See also * Heat exchanger * Moving bed heat exchanger * Thermal Control System * Thermodynamic equilibrium * Industrial automation * Spacecraft thermal control External links * Article about PID control by Bob Pease (from archive.org References {{DEFAULTSORT:Temperature Control Temperature control, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Data Synchronization
Data synchronization is the process of establishing consistency between source and target data stores, and the continuous harmonization of the data over time. It is fundamental to a wide variety of applications, including file synchronization and mobile device synchronization. Data synchronization can also be useful in encryption for synchronizing public key servers. Data synchronization is needed to update and keep multiple copies of a set of data coherent with one another or to maintain data integrity, Figure 3. For example, database replication is used to keep multiple copies of data synchronized with database servers that store data in different locations. Examples Examples include: * File synchronization, such as syncing a hand-held MP3 player to a desktop computer; * Cluster file systems, which are file systems that maintain data or indexes in a coherent fashion across a whole computing cluster; * Cache coherency, maintaining multiple copies of data in sync across ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SpaceWire
SpaceWire is a spacecraft communication network based in part on the IEEE 1355 standard of communications. It is coordinated by the European Space Agency (ESA) in collaboration with international space agencies including NASA, JAXA, and RKA. Within a SpaceWire network the nodes are connected through low-cost, low- latency, full-duplex, point-to-point serial links, and packet switching wormhole routing routers. Architecture Physical layer SpaceWire's modulation and data formats generally follow the data strobe encoding - differential ended signaling (DS-DE) part of the IEEE Std 1355-1995. SpaceWire utilizes asynchronous communication and allows speeds between 2 Mbit/s and 200 Mbit/s, with initial signalling rate of 10 Mbit/s. DS-DE is well-favored because it describes modulation, bit formats, routing, flow control, and error detection in hardware, with little need for software. SpaceWire also has very low error rates, deterministic system behavior, and rel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Webb Instruments Perfected To Microscopic Levels (14486243743)
Webb may refer to: Places Antarctica *Webb Glacier (South Georgia) *Webb Glacier (Victoria Land) * Webb Névé, Victoria Land, the névé at the head of Seafarer Glacier * Webb Nunataks, a group of nunataks in the Neptune Range * Webb Peak (other) Canada * Rural Municipality of Webb No. 138, Saskatchewan ** Webb, Saskatchewan, a village within the rural municipality United States *Webb, Alabama, a town *Webb, Iowa, a city * Webb Lake (Maine) *Webb River, Maine *Webb Memorial State Park, Massachusetts *Webb, Mississippi, a town *Webb City, Missouri, a city *Webb City, Oklahoma, a town * Webb, New York, a town * Webb, Texas, an unincorporated community *Webb County, Texas *Webb Air Force Base, near Big Spring, Texas *Webb Hill, Utah * Webb, West Virginia, an unincorporated community *Webb Canyon, Grand Teton National Park, Wyoming The Moon *Webb (crater) Things * CSS ''Webb'', a Confederate States Navy steam ram in the American Civil War * James Webb Space Telescop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Teledyne Technologies
Teledyne Technologies Incorporated is an American industrial conglomerate. It was founded in 1960, as Teledyne, Inc. by Henry Singleton and George Kozmetsky. From August 1996 to November 1999, Teledyne existed as part of the conglomerate Allegheny Teledyne Incorporated – a combination of the former Teledyne, Inc. and the former Allegheny Ludlum Corporation. On November 29, 1999, three separate entities, Teledyne Technologies, Allegheny Technologies, and Water Pik Technologies, were spun off as free-standing public companies. Allegheny Technologies retained several companies of the former Teledyne, Inc. that fit with Allegheny's core business of steel and exotic metals production. At various times, Teledyne, Inc. owned more than 150 companies with interests as varied as insurance, dental appliances, specialty metals, and aerospace electronics, but many of these had been divested prior to the merger with Allegheny. The new Teledyne Technologies was initially composed of 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lockheed Martin
The Lockheed Martin Corporation is an American Arms industry, defense and aerospace manufacturer with worldwide interests. It was formed by the merger of Lockheed Corporation with Martin Marietta on March 15, 1995. It is headquartered in North Bethesda, Maryland, United States. As of January 2022, Lockheed Martin employs approximately 121,000 employees worldwide, including about 60,000 engineers and scientists. Reports from 2024 estimate that Lockheed Martin Corporation (LMT) holds a market cap of around $139.7 billion. Lockheed Martin is one of the largest companies in the aerospace, military support, security, and technologies industry. It was the world's largest defense contractor by revenue for fiscal year 2014.POC Top 20 Defence Contractors of 2014 . Retrieved: July 2015 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Collimating
A collimated beam of light or other electromagnetic radiation has parallel rays, and therefore will spread minimally as it propagates. A laser beam is an archetypical example. A perfectly collimated light beam, with no divergence, would not disperse with distance. However, diffraction prevents the creation of any such beam. Light can be approximately collimated by a number of processes, for instance by means of a collimator. Perfectly collimated light is sometimes said to be ''focused at infinity''. Thus, as the distance from a point source increases, the spherical wavefronts become flatter and closer to plane waves, which are perfectly collimated. Other forms of electromagnetic radiation can also be collimated. In radiology, X-rays are collimated to reduce the volume of the patient's tissue that is irradiated, and to remove stray photons that reduce the quality of the x-ray image ("film fog"). In scintigraphy, a gamma ray collimator is used in front of a detector to allow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zinc Selenide
Zinc selenide is the inorganic compound with the formula ZnSe. It is a lemon-yellow solid although most samples have a duller color due to the effects of oxidation. It is an intrinsic semiconductor with a band gap of about 2.70 eV at , equivalent to a wavelength of 459 nm. ZnSe occurs as the rare mineral stilleite, named after Hans Stille. Synthesis and properties ZnSe is available in both hexagonal (wurtzite) and cubic (zincblende) polymorphs. In both cases, the Zn2+ and Se2− sites are tetrahedral. The difference in the structures related to close packing motifs, hexagonal vs cubic. Cubic ZnSe is produced by treatment of an aqueous solution of zinc sulfate with hydrogen selenide: : Heating the cubic form gives hexagonal ZnSe. An alternative synthesis involves heating a mixture of zinc oxide, zinc sulfide, and selenium: : It is a wide-bandgap semiconductor of the II-VI semiconductor group (since zinc and selenium belong to the 12th and 16th groups of the periodic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
