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WHCA Roadrunner
The White House Communications Agency Roadrunner vehicle is an element of every American presidential motorcade. It is also known as the MC2V (mobile command and control vehicle). The vehicle serves as the communications hub for the motorcade by encrypting duplex radio and streaming video which in turn is beamed up to a military satellite which in turn beams that data back down to a ground entry point and through to the WHCA switchboard. The vehicle is a heavily modified Chevrolet Suburban equipped with protective armor, runflat tires, vehicle transponder, and turbocharger. The most obvious feature is a configurable antennae platform mounted on the roof. This contains a large SATCOM dome containing a tracking dish that serves as the data uplink and downlink as the primary communications path for the motorcade. Also on the roof are smaller VHF antennas that serve as a repeater for the other motorcade elements as well as another communications path to local authorities and the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bush's Motorcade In Zagreb (4)
Bush Brothers and Company is a family-owned corporation best known for its Bush's Best brand canned baked beans. The company produces approximately 80 percent of the canned baked beans consumed in the United States, representing estimated annual sales in excess of $400 million and the processing of more than 55 million pounds of beans per year. In addition, the company also offers other canned beans (black, garbanzo, pinto, and refried), as well as peas, hominy, and cut green beans. Based in Knoxville, Tennessee, Bush Brothers operates plants in Augusta, Wisconsin and Chestnut Hill, Tennessee. Its canned goods are sold through retail food outlets and food service operators throughout the United States and Canada. History In 1904, A. J. (Andrew Jackson) Bush entered a partnership with the Stokely family to open a tomato cannery in Chestnut Hill, Tennessee. His cannery proved so profitable that, by 1908, he was able to buy out the Stokelys' interest and establish his own independent ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Motorcade
A motorcade, or autocade, is a procession of vehicles. Etymology The term ''motorcade'' was coined by Lyle Abbot (in 1912 or 1913 when he was automobile editor of the ''Arizona Republican''), and is formed after ''cavalcade'', playing off of the last syllable in that word. The original suffix in ''cavalcade'' is actually " -ade", and there is no " -cade" in either French or Latin. ''-cade'' has since become a productive suffix in English, leading to the alternative names ''carcade'', ''autocade'', and even ''Hoovercade'' (after J. Edgar Hoover) as a suffix meaning "procession". Eric Partridge called the name a "monstrosity", and Lancelot Hogben considered the word to be a "counterfeit coinage". Uses of motorcades Funerals A funeral cortege is a procession of mourners, most often in a motorcade of vehicles following a hearse. Protests and demonstrations Motorcades can be used as protests and demonstrations. A large, organised, group of vehicles will travel a busy ro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Duplex (telecommunications)
A duplex communication system is a point-to-point system composed of two or more connected parties or devices that can communicate with one another in both directions. Duplex systems are employed in many communications networks, either to allow for simultaneous communication in both directions between two connected parties or to provide a reverse path for the monitoring and remote adjustment of equipment in the field. There are two types of duplex communication systems: full-duplex (FDX) and half-duplex (HDX). In a full-duplex system, both parties can communicate with each other simultaneously. An example of a full-duplex device is plain old telephone service; the parties at both ends of a call can speak and be heard by the other party simultaneously. The earphone reproduces the speech of the remote party as the microphone transmits the speech of the local party. There is a two-way communication channel between them, or more strictly speaking, there are two communication channel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chevrolet Suburban
The Chevrolet Suburban is a series of automobiles built by the Chevrolet division of General Motors. The name started in 1934 for the 1935 U.S. model year, making it the longest continuously used automobile nameplate in production. It has traditionally been one of General Motors' most profitable vehicles. The 1935 first generation Carryall Suburban was one of the first production all-metal bodied station wagons. It now has a full-size SUV body style and comes with three engine options: a 5.3 liter V8, 6.2 liter V8 or a 3.0 liter Inline-6 turbo diesel. The Suburban was additionally produced under the GMC marque until the GMC version was rebranded as the Yukon XL. It was also briefly marketed as a Holden. For most of its recent history, the Suburban has been a station wagon−bodied version of the Chevrolet pickup truck, including the Chevrolet C/K and Silverado series of truck-based vehicles. Cadillac offers a version called the Escalade ESV. The Suburban is sold in th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Runflat Tire
A run-flat tire/tyre is a pneumatic vehicle tire that is designed to resist the effects of deflation when punctured, and to allow the vehicle to continue to be driven at reduced speeds - under – and for limited distances – usually , depending on the type of tire. Technologies There are three basic technologies currently available, described below. Self-supporting The origins of the commercial ''self-supporting'' run-flat tire started in 1935 with a tire that had a fabric inner tire. The tire was advertised as a protection against blowouts, a common and dangerous occurrence in the 1930s. In 1934, Michelin introduced a tire that was based on technology developed for local commuter trains and trolleys. It had a safety rim inside the tire which if punctured would run on a special foam lining. The tire was sold for military use and for specialized vehicles like bank armoured cars. It was advertised as "semi-bulletproof". While the tire performed as advertised it was far too e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transponder
In telecommunications, a transponder is a device that, upon receiving a signal, emits a different signal in response. The term is a blend word, blend of ''transmitter'' and ''responder''. In air navigation or radio frequency identification, a Transponder (aeronautics), flight transponder is an automated transceiver in an aircraft that emits a coded identifying signal in response to an interrogating received signal. In a communications satellite, a Transponder (satellite communications), satellite transponder receives signals over a range of uplink frequencies, usually from a satellite ground station; the transponder amplifies them, and re-transmits them on a different set of downlink frequencies to receivers on Earth, often without changing the content of the received signal or signals. Satellite/broadcast communications A communications satellite’s Communication channel, channels are called transponders because each is a separate transceiver or repeater. With digital video d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Turbocharger
In an internal combustion engine, a turbocharger (often called a turbo) is a forced induction device that is powered by the flow of exhaust gases. It uses this energy to compress the intake gas, forcing more air into the engine in order to produce more power for a given displacement. The current categorisation is that a turbocharger is powered by the kinetic energy of the exhaust gasses, whereas a supercharger is mechanically powered (usually by a belt from the engine's crankshaft). However, up until the mid-20th century, a turbocharger was called a "turbosupercharger" and was considered a type of supercharger. History Prior to the invention of the turbocharger, |
Antenna (radio)
In radio engineering, an antenna or aerial is the interface between radio waves propagating through space and electric currents moving in metal conductors, used with a transmitter or receiver. In transmission, a radio transmitter supplies an electric current to the antenna's terminals, and the antenna radiates the energy from the current as electromagnetic wave In physics, electromagnetic radiation (EMR) consists of waves of the electromagnetic (EM) field, which propagate through space and carry momentum and electromagnetic radiant energy. It includes radio waves, microwaves, infrared, (visib ...s (radio waves). In Receiver (radio), reception, an antenna intercepts some of the power of a radio wave in order to produce an electric current at its terminals, that is applied to a receiver to be Amplifier, amplified. Antennas are essential components of all radio equipment. An antenna is an array of conductor (material), conductors (Driven element, elements), elect ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
White House Communications Agency
The White House Communications Agency (WHCA), originally known as the White House Signal Corps (WHSC) and then the White House Signal Detachment (WHSD), was officially formed by the United States Department of War on 25 March 1942 under President Franklin D. Roosevelt. The organization was created to provide secure normal, secret, and emergency communications requirements in support of the president. The organization provided mobile radio, Teletype, telegraph, telephone and cryptographic aides in the White House and at "Shangri-La" (now known as Camp David). The organizational mission was to provide a premier communication system that would enable the president to lead the nation effectively. Reorganization In 1954, during the Eisenhower administration, the WHSD was reorganized under the Office of the Chief Signal Officer, Army Signal Corps as a Class II unit and renamed the White House Army Signal Agency (WHASA). In 1962, WHASA was discontinued by order of the United States secr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Command And Control
Command and control (abbr. C2) is a "set of organizational and technical attributes and processes ... hatemploys human, physical, and information resources to solve problems and accomplish missions" to achieve the goals of an organization or enterprise, according to a 2015 definition by military scientists Marius Vassiliou, David S. Alberts, and Jonathan R. Agre. The term often refers to a military system. Versions of the United States Army ''Field Manual 3-0'' circulated circa 1999 define C2 in a military organization as the exercise of authority and direction by a properly designated commanding officer over assigned and attached forces in the accomplishment of a mission. A 1988 NATO definition is that command and control is the exercise of authority and direction by a properly designated individual over assigned resources in the accomplishment of a common goal. An Australian Defence Force definition, similar to that of NATO, emphasises that C2 is the system empowering des ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carlisle, MA
Carlisle is a town located northwest of Boston in Middlesex County, Massachusetts, United States. As of the 2020 U.S. Census, the town had a population of 5,237. History English colonists first settled the area now incorporated as the town of Carlisle in 1651 on parcels of land of the neighboring towns of Acton, Billerica, Chelmsford and Concord. Carlisle became a district of Concord in 1780 and was incorporated as a town by an act of the legislature in 1805. Activities Carlisle contains a library, a country store, a book store, a dentist's office, an automated teller machine, many residential buildings, and the largest playground in the state of Massachusetts (Carlisle Castle). There are two ice cream stores: one of the four branches of Kimball Farms, and Great Brook Farm State Park which is home to the first robotic milking system in Massachusetts and serves ice cream made from the farm's milk. Great Brook Farm is also the site of one of the premiere cross-country ski tourin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Defense Satellite Communications System
The Defense Satellite Communications System (DSCS) is a United States Space Force satellite constellation that provides the United States with military communications to support globally distributed military users. Beginning in 2007, DSCS is being replaced by the Wideband Global SATCOM system. A total of 14 DSCS-III satellites were launched between the early 1980s and 2003. Two satellites were launched aboard the Space Shuttle ''Atlantis'' in 1985 during the STS-51-J flight. As of 14 September 2021, six DSCS-III satellites were still operational. DSCS operations are currently run by the 4th Space Operations Squadron out of Schriever Space Force Base. Background DSCS went through three major phases — IDCSP (Interim Defense Communication Satellite Program), DSCS-II, and DSCS-III. Since the first launch, DSCS has been the "workhorse" of military satellite communications. All DSCS III satellites have exceeded their 10-year design life. The National Science Foundation use ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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