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Mitsuba (satellite)
Mitsuba was a nanosatellite developed by Kyushu Institute of Technology (Kyutech) which would have tested whether products that are not intended for use in space are still usable for satellites. Mitsuba was launched on 12 October 2022 by an Epsilon rocket, but the launch resulted in a failure and the satellite was lost. Overview Mitsuba was a 2U-sized CubeSat developed by students in Kyutech. The satellite's bus system was based on the design that was used for Aoba VELOX-III. The satellite took two years to develop. Mitsuba would have been the second satellite from Kyutech to be launched through the Japanese space agency JAXA's Innovative Satellite Technology Demonstration Program, following Aoba VELOX-IV. Mission Mitsuba had two major missions. The first mission was to study how semiconductor parts for use on the ground degrade in space. While most of the semiconductor parts typically used in nanosatellites are commercial off-the-shelf products, such products are not certified ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nanosatellite
A small satellite, miniaturized satellite, or smallsat is a satellite of low mass and size, usually under . While all such satellites can be referred to as "small", different classifications are used to categorize them based on mass. Satellites can be built small to reduce the large economic cost of launch vehicles and the costs associated with construction. Miniature satellites, especially in large numbers, may be more useful than fewer, larger ones for some purposes – for example, Satellite#Applications, gathering of scientific data and radio relay. Technical challenges in the construction of small satellites may include the lack of sufficient power storage or of room for a spacecraft propulsion, propulsion system. Rationales One rationale for miniaturizing satellites is to reduce the cost; heavier satellites require larger rockets with greater thrust that also have greater cost to finance. In contrast, smaller and lighter satellites require smaller and cheaper launch ve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RKB Mainichi Broadcasting
(stylized as ''rkb'') is a broadcasting station located in Fukuoka Prefecture, Fukuoka, Japan. It is affiliated with the Japan Radio Network (JRN) and the Japan News Network (JNN). The company is owned by the MBS Media Holdings, Mainichi Shimbun, and the Taro Aso, Aso Group. The initials RKB stand for , the station's former name. History In 1950, following the enactment of the Radio Law, Mainichi Shimbun sought to establish three radio stations in Tokyo, Osaka, and Fukuoka. Its application for the Tokyo area was later merged with those of other national newspapers and Dentsu, forming Radio Tokyo. In the Osaka area, Mainichi Shimbun applied to establish a station under the name New Japan Broadcasting (later renamed Mainichi Broadcasting), and in Fukuoka Prefecture, under the name Radio Kyushu. A license for JOFR was issued on 21 April 1951, and the company was formally established on 29 June. Radio Kyushu began operations on 1 December of the same year. Radio Kyushu was on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Birds-2
Birds-2 is the second iteration of a multinational program called the Joint Global Multi-Nations Birds Satellite project, or Birds project, to help countries build their first satellite. The Japanese Kyushu Institute of Technology (KIT) supported the design and fabrication of the satellites. The satellites were launched by the Falcon 9 Full Thrust rocket as a part of the SpaceX CRS-15 mission on 29 June 2018. The satellites were released from the Kibō module of the International Space Station (ISS) in August 2018. Description The Kyushu Institute of Technology (KIT) in Japan supports non-spacefaring countries to build their first satellite through a program called the Joint Global Multi-Nations Birds Satellite project (Birds). Five countries had their satellites successfully launched in the Birds-1 flight: Japan, Ghana, Mongolia, Nigeria, and Bangladesh. Three countries participated in the Birds-2 program: Bhutan, the Philippines, and Malaysia. UiTMSAT-1 was Malaysia's fir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Birds-1
Birds-1 was the first iteration of a multinational program called the Joint Global Multi-Nations Birds Satellite project, or Birds project, to help countries build their first satellite. The Japanese Kyushu Institute of Technology (KIT) supported the design and fabrication of the satellites. The constellation was launched by a Falcon 9 rocket to the International Space Station on 3 June 2017, as part of CRS-11, where it was released from the Kibō (ISS module), Kibō module into space. Japan, Ghana, Mongolia, Nigeria, and Bangladesh participated in the Birds-1 program, all building identical satellites for the constellation. All of the Birds-1 satellites were deorbited in May 2019. Background The Kyushu Institute of Technology (KIT) in Japan supports non-spacefaring countries to build their first satellite through a program called The Joint Global Multi-Nation Birds Satellite project (BIRDS). Five countries participated in the first Bird program: Japan, Ghana, Mongolia, Ni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spectrum Analyzer
A spectrum analyzer measures the magnitude of an input signal versus frequency within the full frequency range of the instrument. The primary use is to measure the power of the spectrum of known and unknown signals. The input signal that most common spectrum analyzers measure is electrical; however, spectral compositions of other signals, such as acoustic pressure waves and optical light waves, can be considered through the use of an appropriate transducer. Spectrum analyzers for other types of signals also exist, such as optical spectrum analyzers which use direct optical techniques such as a monochromator to make measurements. By analyzing the spectra of electrical signals, dominant frequency, power, distortion, harmonics, bandwidth, and other spectral components of a signal can be observed that are not easily detectable in time domain waveforms. These parameters are useful in the characterization of electronic devices, such as wireless transmitters. The display of a spec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gray (unit)
The gray (symbol: Gy) is the unit of ionizing radiation dose in the International System of Units (SI), defined as the absorption of one joule of radiation energy per kilogram of matter. It is used as a unit of the radiation quantity absorbed dose that measures the energy deposited by ionizing radiation in a unit mass of absorbing material, and is used for measuring the delivered dose in radiotherapy, food irradiation and radiation sterilization. It is important in predicting likely acute health effects, such as acute radiation syndrome and is used to calculate equivalent dose using the sievert, which is a measure of the stochastic health effect on the human body. The gray is also used in radiation metrology as a unit of the radiation quantity kerma (physics), kerma; defined as the sum of the initial kinetic energy , kinetic energies of all the charged particles liberated by uncharged ionizing radiation in a sample of matter per unit mass. The unit was named after British phys ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Absorbed Dose
Absorbed dose is a dose quantity which represents the specific energy (energy per unit mass) deposited by ionizing radiation in living matter. Absorbed dose is used in the calculation of dose uptake in living tissue in both radiation protection (reduction of harmful effects), and radiology (potential beneficial effects, for example in cancer treatment). It is also used to directly compare the effect of radiation on inanimate matter such as in radiation hardening. The SI unit of measure is the gray (Gy), which is defined as one joule of energy absorbed per kilogram of matter. The older, non-SI CGS unit rad, is sometimes also used, predominantly in the USA. Deterministic effects Conventionally, in radiation protection, unmodified absorbed dose is only used for indicating the immediate health effects due to high levels of acute dose. These are tissue effects, such as in acute radiation syndrome, which are also known as deterministic effects. These are effects which are ce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radiation
In physics, radiation is the emission or transmission of energy in the form of waves or particles through space or a material medium. This includes: * ''electromagnetic radiation'' consisting of photons, such as radio waves, microwaves, infrared, visible light, ultraviolet, x-rays, and Gamma ray, gamma radiation (γ) * ''particle radiation'' consisting of particles of non-zero rest energy, such as alpha radiation (α), beta radiation (β), proton radiation and neutron radiation * ''acoustics, acoustic radiation'', such as ultrasound, sound, and seismic waves, all dependent on a physical transmission medium * ''gravitational radiation'', in the form of gravitational waves, ripples in spacetime Radiation is often categorized as either ''ionizing radiation, ionizing'' or ''non-ionizing radiation, non-ionizing'' depending on the energy of the radiated particles. Ionizing radiation carries more than 10 electron volt, electron volts (eV), which is enough to ionize atoms and molecul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Commercial Off-the-shelf
Commercial-off-the-shelf or commercially available off-the-shelf (COTS) products are packaged or canned (ready-made) hardware or software, which are adapted aftermarket to the needs of the purchasing organization, rather than the commissioning of custom-made, or bespoke, solutions. A related term, Mil-COTS, refers to COTS products for use by the U.S. and Canadian militaries. In the context of the Federal government of the United States, U.S. government, the Federal Acquisition Regulation (FAR) has defined "COTS" as a formal term for commercial items, including services, available in the commercial marketplace that can be bought and used under government contract. For example, Microsoft is a COTS software provider. Goods and construction materials may qualify as COTS but bulk cargo does not. Services associated with the commercial items may also qualify as COTS, including installation services, training services, and cloud services. COTS purchases are alternatives to custom softwa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Semiconductor
A semiconductor is a material with electrical conductivity between that of a conductor and an insulator. Its conductivity can be modified by adding impurities (" doping") to its crystal structure. When two regions with different doping levels are present in the same crystal, they form a semiconductor junction. The behavior of charge carriers, which include electrons, ions, and electron holes, at these junctions is the basis of diodes, transistors, and most modern electronics. Some examples of semiconductors are silicon, germanium, gallium arsenide, and elements near the so-called " metalloid staircase" on the periodic table. After silicon, gallium arsenide is the second-most common semiconductor and is used in laser diodes, solar cells, microwave-frequency integrated circuits, and others. Silicon is a critical element for fabricating most electronic circuits. Semiconductor devices can display a range of different useful properties, such as passing current more easil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kyushu Institute Of Technology
The is one of the 87 national universities in Japan. Located in Fukuoka Prefecture on the island of Kyushu, it is dedicated to education and research in the fields of science and technology. It is earlier abbreviated to KIT and is now officially abbreviated to Kyutech. The founder was Matsumoto Kenjiro, second son of Yasukawa Keiichiro, and the links with the Yaskawa Electric Corporation (founded in 1915) remain strong to this day. The centenary of the opening of the Tobata campus is being celebrated in 2009, with Founder's Day on May 28, 2009. One of its famous alumnus is "Mr. Tornado", the severe storms researcher Tetsuya "Ted" Fujita. He graduated in 1943 and was an associate professor until 1953 when he was invited to the University of Chicago. History The university was granted government permission to be founded in 1907 as a private training school for engineers called ''Meiji Senmon Gakkō'' (Meiji Vocational School), toward the end of the Meiji period. The first ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aoba VELOX-IV
The Innovative Satellite Technology Demonstration Program is a series of spacecraft missions for testing technology and ideas put forward by universities and private companies. The program demonstrates various experimental devices and technology in space by providing flight opportunities. It is managed by the JAXA Research and Development Directorate. According to JAXA, the goal of this program is to test high risk, innovative technology that will lead to the space industry gaining competitiveness in the international field. Innovative Satellite Technology Demonstration-1 Innovative Satellite Technology Demonstration-1 was the first mission in the Innovative Satellite Technology Demonstration Program. The mission included several spacecraft, the largest being RAPIS-1, along with six smaller satellites. The call for proposals was announced in 2015, and selection results were announced in February 2016. A total of 14 projects were selected; however a proposal by IHI Corporation, t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
