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Satellite Navigation Device
A satellite navigation device (satnav device) is a user equipment that uses one or more of several global navigation satellite systems (GNSS) to calculate the device's geographical position and provide navigational advice. Depending on the software used, the satnav device may display the position on a map, as Geographic coordinate system, geographic coordinates, or may offer routing directions. As of September 2020, there were four operational GNSS systems, the original United States' Global Positioning System (GPS), the European Union's Galileo (satellite navigation), Galileo, Russia's GLONASS, and China's BeiDou Navigation Satellite System. The Indian Regional Navigation Satellite System (IRNSS) will follow and Japan's Quasi-Zenith Satellite System (QZSS) scheduled for 2023 will augment the accuracy of a number of GNSS. A satellite navigation device can retrieve location and time information from one or more GNSS systems in all weather conditions, anywhere on or near th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magellan Trailblazer XL GPS Handheld Receiver
Ferdinand Magellan ( or ; pt, Fernão de Magalhães, ; es, link=no, Fernando de Magallanes, ; 4 February 1480 – 27 April 1521) was a Portuguese explorer. He is best known for having planned and led the 1519 Spanish expedition to the East Indies across the Pacific Ocean to open a maritime trade route, during which he discovered the interoceanic passage bearing thereafter his name and achieved the first European navigation from the Atlantic to Asia. During this voyage, Magellan was killed in the Battle of Mactan in 1521 in the present-day Philippines, after running into resistance by the indigenous population led from Lapulapu, who consequently became a Philippines national symbol of resistance to colonialism. After Magellan's death, Juan Sebastián Elcano took the lead of the expedition, and with its few other surviving members in one of the two remaining ships, completed the first circumnavigation of Earth when they returned to Spain in 1522. Born 4 February 1480 into a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Assisted GNSS
Assisted GNSS (A-GNSS) is a GNSS augmentation system that often significantly improves the startup performance—i.e., time-to-first-fix (TTFF)—of a global navigation satellite system (GNSS). A-GNSS works by providing the necessary data to the device via a radio network instead of the slow satellite link, essentially "warming up" the receiver for a fix. When applied to GPS, it is known as assisted GPS or augmented GPS (abbreviated generally as A-GPS and less commonly as aGPS). Other local names include A-GANSS for Galileo and A-Beidou for BeiDou. A-GPS is extensively used with GPS-capable cellular phones, as its development was accelerated by the U.S. FCC's 911 requirement to make cell phone location data available to emergency call dispatchers. Background Every GPS device requires orbital data about the satellites to calculate its position. The data rate of the satellite signal is only 50 bit/s, so downloading orbital information like ephemerides and the almanac directly fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eunos Cosmo
The is an automobile which was produced by Mazda from 1967 until 1995. Throughout its history, the Cosmo served as a "Halo effect, halo" vehicle for Mazda, with the first Cosmo successfully launching the Mazda Wankel engine. The final generation of Cosmo served as Mazda's flagship vehicle in Japan, being sold as the Eunos Cosmo through its luxury Eunos (automobile), Eunos division in Japan. Mazda chose to use the name ''"wikt:cosmo, cosmo"'', reflecting international cultural fascination with the Space Race, as Mazda wanted to showcase the rotary engine as forward-thinking, with a focus on future developments and technology. Series L10A/L10B (1967–1972) The first Mazda to bear the Cosmo name (called the 110S on models intended for export) was (along with the NSU Ro80) one of the first production cars to feature a 2-rotor Wankel engine. A prototype was presented at the 1964 Tokyo Motor Show, one month before the 1964 Summer Olympics, and after the introduction of the NSU Sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mazda
, commonly referred to as simply Mazda, is a Japanese multinational automotive manufacturer headquartered in Fuchū, Hiroshima, Japan. In 2015, Mazda produced 1.5 million vehicles for global sales, the majority of which (nearly one million) were produced in the company's Japanese plants, with the remainder coming from a variety of other plants worldwide. During this time, Mazda was the 15th-largest automaker in terms of production globally. History Creation Mazda began as the Toyo Cork Kogyo Co., Ltd, as a cork-making factory founded in Hiroshima, Japan, 30 January 1920. Toyo Cork Kogyo renamed itself to Toyo Kogyo Co., Ltd. in 1927. In the late 1920s the company had to be saved from bankruptcy by Hiroshima Saving Bank and other business leaders in Hiroshima. In 1931, Toyo Kogyo moved from manufacturing machine tools to vehicles with the introduction of the Mazda-Go auto rickshaw. The name ''Mazda'' came into existence with the production of the company's fi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magellan Navigation
Magellan Navigation, Inc. is an American producer of consumer and professional grade global positioning system receivers, named after Ferdinand Magellan, the first explorer to circumnavigate the globe. Headquartered in San Dimas, California, with European sales and engineering centres in Nantes, France and Moscow, Russia, Magellan also produces aftermarket automotive GPS units, including the The Hertz Corporation#Hertz Neverlost, Hertz Neverlost system found in The Hertz Corporation, Hertz rental cars. The Maestro, RoadMate, Triton, and eXplorist lines are Magellan's current consumer offerings. The company also produces proprietary road maps (DirectRoute), topographic maps (Topo), and marine charts (BlueNav) for use with its consumer GPS receivers. History Magellan started as an independent company. It was once owned by Orbital Sciences Corporation, which purchased it in 1994. In 2001, Thales Group purchased the Magellan division of Orbital Sciences for about $70 million and the c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Selective Availability
The error analysis for the Global Positioning System is important for understanding how GPS works, and for knowing what magnitude of error should be expected. The GPS makes corrections for receiver clock errors and other effects but there are still residual errors which are not corrected. GPS receiver position is computed based on data received from the satellites. Errors depend on geometric dilution of precision and the sources listed in the table below. Overview User equivalent range errors (UERE) are shown in the table. There is also a numerical error with an estimated value, \ \sigma_ , of about . The standard deviations, \ \sigma_R, for the coarse/acquisition (C/A) and precise codes are also shown in the table. These standard deviations are computed by taking the square root of the sum of the squares of the individual components (i.e., RSS for root sum squares). To get the standard deviation of receiver position estimate, these range errors must be multiplied by the app ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ronald Reagan
Ronald Wilson Reagan ( ; February 6, 1911June 5, 2004) was an American politician, actor, and union leader who served as the 40th president of the United States from 1981 to 1989. He also served as the 33rd governor of California from 1967 to 1975, after having a career in entertainment. Reagan was born in Tampico, Illinois. He graduated from Eureka College in 1932 and began to work as a sports announcer in Iowa. In 1937, Reagan moved to California, where he found Ronald Reagan filmography, work as a film actor. From 1947 to 1952, Reagan served as the president of the Screen Actors Guild, working to Hollywood blacklist, root out alleged communist influence within it. In the 1950s, he moved to a career in television and became a spokesman for General Electric. From 1959 to 1960, he again served as the guild's president. In 1964, his speech "A Time for Choosing" earned him national attention as a new conservative figure. Building a network of supporters, Reagan was 1966 Califo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Korean Air Lines Flight 007
Korean Air Lines Flight 007 (KE007/KAL007)The flight number KAL 007 was used by air traffic control, while the public flight booking system used KE 007 was a scheduled Korean Air Lines flight from New York City to Seoul via Anchorage, Alaska. On September 1, 1983, the flight was shot down by a Soviet Sukhoi Su-15 interceptor. The Boeing 747 airliner was en route from Anchorage to Seoul, but owing to a navigational mistake made by the crew, the airliner drifted from its original planned route and flew through Soviet prohibited airspace around the time of a U.S. aerial reconnaissance mission. The Soviet Air Forces treated the unidentified aircraft as an intruding U.S. spy plane, and destroyed it with air-to-air missiles, after firing warning shots which were probably not seen by the KAL pilots. The Korean airliner eventually crashed in the sea near Moneron Island west of Sakhalin in the Sea of Japan. All 269 passengers and crew aboard were killed, including Larry McDonald, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transit (satellite)
The Transit system, also known as NAVSAT or NNSS (for ''Navy Navigation Satellite System''), was the first satellite navigation system to be used operationally. The radio navigation system was primarily used by the U.S. Navy to provide accurate location information to its Polaris ballistic missile submarines, and it was also used as a navigation system by the Navy's surface ships, as well as for hydrographic survey and geodetic surveying. Transit provided continuous navigation satellite service from 1964, initially for Polaris submarines and later for civilian use as well. In the Project DAMP Program, the missile tracking ship USAS American Mariner also used data from the satellite for precise ship's location information prior to positioning its tracking radars. History The Transit satellite system, sponsored by the Navy and developed jointly by DARPA and the Johns Hopkins Applied Physics Laboratory, under the leadership of Dr. Richard Kershner at Johns Hopkins, was the fir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cold War
The Cold War is a term commonly used to refer to a period of geopolitical tension between the United States and the Soviet Union and their respective allies, the Western Bloc and the Eastern Bloc. The term '' cold war'' is used because there was no large-scale fighting directly between the two superpowers, but they each supported major regional conflicts known as proxy wars. The conflict was based around the ideological and geopolitical struggle for global influence by these two superpowers, following their temporary alliance and victory against Nazi Germany and Imperial Japan in 1945. Aside from the nuclear arsenal development and conventional military deployment, the struggle for dominance was expressed via indirect means such as psychological warfare, propaganda campaigns, espionage, far-reaching embargoes, rivalry at sports events, and technological competitions such as the Space Race. The Western Bloc was led by the United States as well as a number of other First W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Self-driving Car
A self-driving car, also known as an autonomous car, driver-less car, or robotic car (robo-car), is a car that is capable of traveling without human input.Xie, S.; Hu, J.; Bhowmick, P.; Ding, Z.; Arvin, F.,Distributed Motion Planning for Safe Autonomous Vehicle Overtaking via Artificial Potential Field IEEE Transactions on Intelligent Transportation Systems, 2022. Self-driving cars use sensors to perceive their surroundings, such as optical and thermographic cameras, radar, lidar, ultrasound/sonar, GPS, odometry and inertial measurement units. Control systems interpret sensory information to create a three-dimensional model of the surroundings. Based on the model, the car identifies appropriate navigation paths, and strategies for managing traffic controls (stop signs, etc.) and obstacles.Hu, J.; Bhowmick, P.; Jang, I.; Arvin, F.; Lanzon, A.,A Decentralized Cluster Formation Containment Framework for Multirobot Systems IEEE Transactions on Robotics, 2021. Once the technol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Turn-by-turn Navigation
Turn-by-turn Navigation is a feature of some satellite navigation devices where directions for a selected route are continually presented to the user in the form of spoken or visual instructions. The system keeps the user up-to-date about the best route to the destination, and is often updated according to changing factors such as traffic and road conditions. Turn-by-turn systems typically use an electronic voice to inform the user whether to turn left or right, the street name, and the distance to the next turn. Mathematically, turn by turn navigation is based on the shortest path problem within graph theory, which examines how to identify the path that best meets some criteria (shortest, cheapest, fastest, etc.) between two points in a large network. History Real-time turn-by-turn navigation instructions by computer was first developed at the MIT Media Laboratory by James Raymond Davis and Christopher M. Schmandt in 1988. Their system, Backseat Driver, monitored the car's positi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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