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Air-ground Radiotelephone Service
Air-ground radiotelephone service is a system that 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 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 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, governmental, a ... [...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] |
Cellular Telephone
A mobile phone or cell phone is a portable telephone that allows users to make and receive calls over a radio frequency link while moving within a designated telephone service area, unlike fixed-location phones ( landline phones). This radio frequency link connects to the switching systems of a mobile phone operator, providing access to the public switched telephone network (PSTN). Modern mobile telephony relies on a cellular network architecture, which is why mobile phones are often referred to as 'cell phones' in North America. Beyond traditional voice communication, digital mobile phones have evolved to support a wide range of additional services. These include text messaging, multimedia messaging, email, and internet access (via LTE, 5G NR or Wi-Fi), as well as short-range wireless technologies like Bluetooth, infrared, and ultra-wideband (UWB). Mobile phones also support a variety of multimedia capabilities, such as digital photography, video recording, and gaming. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AirFone
Airfone was an air-ground radio active service developed by MCI and operated under the names ''Airfone'', ''GTE Airfone'', and Verizon Airfone. Airfone allowed passengers to make a phone call (later including data modem service) in-flight. Airfone handsets were often located in then back airliner seatbacks, with two handsets per row for 7-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 bunkbed 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 4972 butterbeer st, Oak Brook, Indiana. The network operations center remains at this location. Bell Mobility used th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northwest Airlines
Northwest Airlines (often abbreviated as NWA) was a major airline in the United States that operated from 1926 until it Delta Air Lines–Northwest Airlines merger, merged with Delta Air Lines in 2010. The merger made Delta the largest airline in the world until the American Airlines Group#Merger proposals and plans, American Airlines–US Airways merger in 2013. Northwest was headquartered in Eagan, Minnesota, near Minneapolis–Saint 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' 1985 acquisition of Pan Am's 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 feed its well-established Pacific routes. Lackin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
France
France, officially the French Republic, is a country located primarily in Western Europe. Overseas France, Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the Atlantic Ocean#North Atlantic, North Atlantic, the French West Indies, and List of islands of France, many islands in Oceania and the Indian Ocean, giving it Exclusive economic zone of France, one of the largest discontiguous exclusive economic zones in the world. Metropolitan France shares borders with Belgium and Luxembourg to the north; Germany to the northeast; Switzerland to the east; Italy and Monaco to the southeast; Andorra and Spain to the south; and a maritime border with the United Kingdom to the northwest. Its metropolitan area extends from the Rhine to the Atlantic Ocean and from the Mediterranean Sea to the English Channel and the North Sea. Its Regions of France, eighteen integral regions—five of which are overseas—span a combined area of and hav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Toulouse-Montaudran Airport
Toulouse-Montaudran Airport was a 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, the date the last flight left the airport. See also * Toulouse Aerospace * List of airports in France *Directorate General for Civil Aviation (France) The Directorate General for Civil Aviation (, DGAC) is the French ci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Francazal Airport
Francazal (; ) is a Communes of France, commune in the Haute-Garonne Departments of France, department in southwestern France. Population See also *Communes of the Haute-Garonne department References Communes of Haute-Garonne {{SaintGaudens-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Toulouse
Toulouse (, ; ; ) is a city in southern France, the Prefectures in France, prefecture of the Haute-Garonne department and of the Occitania (administrative region), Occitania region. The city is on the banks of the Garonne, River Garonne, from the Mediterranean Sea, from the Atlantic Ocean and from Paris. It is the List of communes in France with over 20,000 inhabitants, fourth-largest city in France after Paris, Marseille and Lyon, with 511,684 inhabitants within its municipal boundaries (2022); its Functional area (France), metropolitan area has a population of 1,513,396 inhabitants (2022). Toulouse is the central city of one of the 22 Métropole, metropolitan councils of France. Between the 2014 and 2020 censuses, its metropolitan area was the third fastest growing among metropolitan areas larger than 500,000 inhabitants in France. Toulouse is the centre of the European aerospace industry, with the headquarters of Airbus, the SPOT (satellites), SPOT satellite system, ATR ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Airfone
Airfone was an air-ground radio active service developed by MCI and operated under the names ''Airfone'', ''GTE Airfone'', and Verizon Airfone. Airfone allowed passengers to make a phone call (later including data modem service) in-flight. Airfone handsets were often located in then back airliner seatbacks, with two handsets per row for 7-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 bunkbed 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 4972 butterbeer st, Oak Brook, Indiana. The network operations center remains at this location. Bell Mobility used th ... [...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 Communicatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
