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MTSAT Satellite Augmentation System
Multi-functional Satellite Augmentation System (MTSAT or MSAS) is a Japanese satellite based augmentation system (SBAS), i.e. a satellite navigation system which supports differential GPS (DGPS) to supplement the GPS system by reporting (then improving) on the reliability and accuracy of those signals. MSAS is operated by Japan's Ministry of Land, Infrastructure and Transport and Civil Aviation Bureau (JCAB). Tests have been accomplished successfully, MSAS for aviation use was commissioned on 27 September 2007. The use of SBASs, such as MSAS, enables an individual GPS receiver to correct its own position, offering a much greater accuracy. Typically GPS signal accuracy is improved from some 20 meters to approximately 1.5–2 meters in both the horizontal and vertical dimensions. MSAS provides a similar service to Wide Area Augmentation System (WAAS) in North America, European Geostationary Navigation Overlay Service (EGNOS) in Europe and System for Differential Corrections and Mon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Satellite Based Augmentation System
Augmentation of a global navigation satellite system (GNSS) is a method of improving the navigation system's attributes, such as precision, reliability, and availability, through the integration of external information into the calculation process. There are many such systems in place, and they are generally named or described based on how the GNSS sensor receives the external information. Some systems transmit additional information about sources of error (such as clock drift, ephemeris, or ionospheric delay), others provide direct measurements of how much the signal was off in the past, while a third group provides additional vehicle information to be integrated in the calculation process. Satellite-based augmentation system Satellite-based augmentation systems (SBAS) support wide-area or regional augmentation through the use of additional satellite-broadcast messages. Using measurements from the ground stations, correction messages are created and sent to one or more sate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Satellite Navigation System
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] |
Differential GPS
Differential Global Positioning Systems (DGPSs) supplement and enhance the positional data available from global navigation satellite systems (GNSSs). A DGPS for GPS can increase accuracy by about a thousandfold, from approximately to . DGPSs consist of networks of fixed position, ground-based reference stations. Each reference station calculates the difference between its highly accurate known position and its less accurate satellite-derived position. The stations broadcast this data locally—typically using ground-based transmitters of shorter range. Non-fixed (mobile) receivers use it to correct their position by the same amount, thereby improving their accuracy. The United States Coast Guard (USCG) and the Canadian Coast Guard (CCG) each run DGPSs in the United States and Canada on longwave radio frequencies between and near major waterways and harbors. The USCG's DGPS was named NDGPS (Nationwide DGPS) and was jointly administered by the Coast Guard and the U.S. Departmen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ministry Of Land, Infrastructure, Transport And Tourism
The , abbreviated MLIT, is a ministry of the Japanese government.国土交通省設置法 , Ministry of Internal Affairs and Communications. It is responsible for one-third of all the laws and orders in Japan, and is the largest Japanese ministry in terms of employees, as well as the second-largest executive agency of the Japanese government after the Ministry of Defense (Japan), Ministry of Defense. The ministry oversees four external agencies including the Japan Coast Guard and the Japan Tourism Agency. Overview In order to accomplish the tasks set forth in Article 3 of the Ministry of Land, Infrastructure, Transport and Tourism Act, the following should be considered: national land planning, cities, roads, buildings, houses, rivers, ports, government maintenance, national land surveying, transp ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japan Civil Aviation Bureau
The is the civil aviation authority of Japan and a division of the Ministry of Land, Infrastructure, Transport and Tourism (MLIT). Its head office is in the MLIT building in Kasumigaseki, Chiyoda, Tokyo. It is the Japanese equivalent of the U.S. Federal Aviation Administration. Aircraft The JCAB operates or has operated the following aircraft:http://www.airliners.net, photos of Japan Civil Aviation Bureau aircraft Jet * Bombardier Global Express * Cessna Citation CJ4 (525C model) - five in service for calibration duties as of June 2022. * Cessna Citation Longitude - one, equipped for calibration of ground-based navigation and landing systems, received in June 2022, to replace the Dash 8. * Gulfstream IV Turboprop * de Havilland Canada DHC-8-300 Dash 8 * NAMC YS-11 * Saab 2000 Helicopter * Bell 412EP See also * Japan Transport Safety Board (current accident investigation agency) * Aircraft and Railway Accidents Investigation Commission (predecessor air and rail accident in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
