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Air-ground Radiotelephone Service
Air-ground radiotelephone service is a system which allows voice calls and other communication services to be made from an aircraft to either a satellite or land based network. The service operates via a transceiver mounted in the aircraft on frequency assignment authority, designated frequency, frequencies. In the US these frequencies have been allocated by the Federal Communications Commission. The system is used in both commercial and general aviation services. Licensees may offer a wide range of telecommunications services to passengers and others on aircraft. Design A U.S. air-ground radiotelephone transmits a radio signal in the 849 to 851 Hertz, megahertz range; this signal is sent to either a receiving ground station or a communications satellite depending on the design of the particular system. ''"Commercial aviation air-ground radiotelephone service licensees operate in the 800 MHz band and can provide communication services to all aviation markets, including commercial ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frequency Assignment Authority
Spectrum management is the process of regulating the use of radio frequency, radio frequencies to promote efficient use and gain a net social benefit.Martin Cave, Chris Doyle, William Webb, ''Modern Spectrum Management'', Cambridge University Press, 2007 The term ''radio spectrum'' typically refers to the full frequency range from 1 hertz, Hz to 3000 hertz, GHz (3 hertz, THz) that may be used for wireless communication. Increasing demand for services such as mobile telephones and many others has required changes in the philosophy of spectrum management. Demand for wireless broadband has soared due to technological innovation, such as 3G and 4G mobile services, and the rapid expansion of wireless internet services. Since the 1930s, spectrum was assigned through administrative licensing. Limited by technology, signal interference was once considered as a major problem of spectrum use. Therefore, exclusive licensing was established to protect licensees' signals. This forme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AirFone
Airfone was an air-ground radiotelephone service developed by MCI founder John D. Goeken, and operated under the names ''Airfone'', ''GTE Airfone'', and Verizon Airfone. Airfone allowed passengers to make telephone calls (later including data modem service) in-flight. Airfone handsets were often located in the middle airliner seatbacks, with two handsets per row for 6-wide coach seating configurations, and more or less depending on the aircraft layout and fare class. First class cabins typically had one handset per seat. Some planes had one or more bulkhead mounted phone stations with cordless handsets that the passengers could use, instead of the multiple wired handsets. Airfone phone calls were usually quite expensive compared to ground-based telephone calls, costing $3.99 per call and $4.99 per minute in 2006. The original Airfone main office and network operations center are located at 2809 Butterfield Rd, Oak Brook, Illinois. The network operations center remains at this l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northwest Airlines
Northwest Airlines Corp. (NWA) was a major American airline founded in 1926 and absorbed into Delta Air Lines, Inc. by a merger. The merger, approved on October 29, 2008, made Delta the largest airline in the world until the American Airlines-US Airways merger on December 9, 2013. Northwest continued to operate under its own name and brand until the integration of the carriers was completed on January 31, 2010. Northwest was headquartered in Eagan, Minnesota near Minneapolis-St. Paul International Airport. After World War II it became dominant in the trans-Pacific market with a hub in Tokyo, Japan (initially Haneda Airport, later Narita International Airport). In response to United Airlines's 1985 acquisition of Pan Ams' Pacific routes, Northwest paid $884 million to purchase Republic Airlines and then established fortress hubs at Detroit Metropolitan Wayne County Airport and Memphis International Airport. With this merger, NWA established the domestic network necessary to f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
France
France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of Overseas France, overseas regions and territories in the Americas and the Atlantic Ocean, Atlantic, Pacific Ocean, Pacific and Indian Oceans. Its Metropolitan France, metropolitan area extends from the Rhine to the Atlantic Ocean and from the Mediterranean Sea to the English Channel and the North Sea; overseas territories include French Guiana in South America, Saint Pierre and Miquelon in the North Atlantic, the French West Indies, and many islands in Oceania and the Indian Ocean. Due to its several coastal territories, France has the largest exclusive economic zone in the world. France borders Belgium, Luxembourg, Germany, Switzerland, Monaco, Italy, Andorra, and Spain in continental Europe, as well as the Kingdom of the Netherlands, Netherlands, Suriname, and Brazil in the Americas via its overseas territories in French Guiana and Saint Martin (island), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Toulouse-Montaudran Airport
Toulouse-Montaudran Airport is a former French airport located in the district of Montaudran in the municipality of Toulouse in the Haute-Garonne department of the region of Occitanie. History Created in 1917 by Pierre-Georges Latécoère, it became a centre for civil aviation and the aeronautics industry. In 1918 "Lignes Aériennes Latécoère" was created, and in 1927 it became the departure point for Aéropostale with pilots based at the airport including Jean Mermoz, Henri Guillaumet, Paul Vachet and Antoine de Saint-Exupéry. Latécoère, successor to Aéropostale, until the 1970s Breguet, used the airport for repairs to their aircraft. Eventually, Air France Industries used the site for maintenance of their aircraft until 18 December 2003, 18, the date the last flight left the airport. See also * Montaudran Aerospace * L'Aéropostale, courrier du ciel *List of airports in France *Directorate General for Civil Aviation (France) * Montaudran *Groupe Latécoè ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Francazal Airport
Francazal (; oc, Hranccasau) is a commune in the Haute-Garonne department in southwestern France. Population See also *Communes of the Haute-Garonne department The following is a list of the 586 communes of the French department of Haute-Garonne. The communes cooperate in the following intercommunalities (as of 2020):Communes of Haute-Garonne {{HauteGaronne-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Toulouse
Toulouse ( , ; oc, Tolosa ) is the prefecture of the French department of Haute-Garonne and of the larger region of Occitania. The city is on the banks of the River Garonne, from the Mediterranean Sea, from the Atlantic Ocean and from Paris. It is the fourth-largest city in France after Paris, Marseille and Lyon, with 493,465 inhabitants within its municipal boundaries (2019 census); its metropolitan area has a population of 1,454,158 inhabitants (2019 census). Toulouse is the central city of one of the 20 French Métropoles, with one of the three strongest demographic growth (2013-2019). Toulouse is the centre of the European aerospace industry, with the headquarters of Airbus, the SPOT satellite system, ATR and the Aerospace Valley. It hosts the CNES's Toulouse Space Centre (CST) which is the largest national space centre in Europe, but also, on the military side, the newly created NATO space centre of excellence and the French Space Command and Space Academy. Thales ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Airfone
Airfone was an air-ground radiotelephone service developed by MCI founder John D. Goeken, and operated under the names ''Airfone'', ''GTE Airfone'', and Verizon Airfone. Airfone allowed passengers to make telephone calls (later including data modem service) in-flight. Airfone handsets were often located in the middle airliner seatbacks, with two handsets per row for 6-wide coach seating configurations, and more or less depending on the aircraft layout and fare class. First class cabins typically had one handset per seat. Some planes had one or more bulkhead mounted phone stations with cordless handsets that the passengers could use, instead of the multiple wired handsets. Airfone phone calls were usually quite expensive compared to ground-based telephone calls, costing $3.99 per call and $4.99 per minute in 2006. The original Airfone main office and network operations center are located at 2809 Butterfield Rd, Oak Brook, Illinois. The network operations center remains at this l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Verizon
Verizon Communications Inc., commonly known as Verizon, is an American multinational telecommunications conglomerate and a corporate component of the Dow Jones Industrial Average. The company is headquartered at 1095 Avenue of the Americas in Midtown Manhattan, New York City, but is Delaware General Corporation Law, incorporated in Delaware. The company was formed in 1984 as Bell Atlantic as part of the breakup of the Bell System, break up of the Bell System into seven companies, each a Regional Bell Operating Company (RBOC), commonly referred to as "Baby Bells". Headquartered in Philadelphia, it originally had an operating area from New Jersey to Virginia. In 1997, Bell Atlantic expanded into New York (state), New York and the New England states by merging with fellow Baby Bell NYNEX. While Bell Atlantic was the surviving company, the merged company moved its headquarters from Philadelphia to NYNEX's old headquarters in New York City. In 2000, Bell Atlantic acquired GTE, whi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Narrowband
Narrowband signals are signals that occupy a narrow range of frequencies or that have a small fractional bandwidth. In the audio spectrum, narrowband sounds are sounds that occupy a narrow range of frequencies. In telephony, narrowband is usually considered to cover frequencies 300–3400 Hz, i.e. the voiceband. In radio communications, a narrowband channel is a channel in which the bandwidth of the message does not significantly exceed the channel's coherence bandwidth. In the study of wired channels, ''narrowband'' implies that the channel under consideration is sufficiently narrow that its frequency response can be considered flat. The message bandwidth will therefore be less than the coherence bandwidth of the channel. That is, no channel has perfectly flat fading, but the analysis of many aspects of wireless systems is greatly simplified if flat fading can be assumed. Two-way radio narrowband Two-Way Radio Narrowbanding refers to a U.S. Federal Communications Commiss ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
