Francis Scott Key was an American lawyer, author, and amateur poet from Frederick, Maryland who is best known for writing the lyrics for the American national anthem "The Star-Spangled Banner".
Radioteletype (RTTY) is a telecommunications system consisting originally of two or more electromechanical teleprinters in different locations connected by radio rather than a wired link. These machines were superseded by personal computers (PCs) running software to emulate teleprinters. Radioteletype evolved from earlier landline teleprinter operations that began in the mid-1800s. The US Navy Department successfully tested printing telegraphy between an airplane and ground radio station in 1922. Later that year, the Radio Corporation of America successfully tested printing telegraphy via their Chatham, Massachusetts, radio station to the R.M.S. Majestic. Commercial RTTY systems were in active service between San Francisco and Honolulu as early as April 1932 and between San Francisco and New York City by 1934. The US military used radioteletype in the 1930s and expanded this usage during World War II. From the 1980s, teleprinters were replaced by computers running teleprinter emulation software.
Frequency-shift keying (FSK) is a frequency modulation scheme in which digital information is transmitted through discrete frequency changes of a carrier signal. The technology is used for communication systems such as telemetry, weather balloon radiosondes, caller ID, garage door openers, and low frequency radio transmission in the VLF and ELF bands. The simplest FSK is binary FSK (BFSK). BFSK uses a pair of discrete frequencies to transmit binary information. With this scheme, the "1" is called the mark frequency and the "0" is called the space frequency.
Frederick is a city in, and the county seat, of Frederick County in the U.S. state of Maryland. It is part of the Baltimore–Washington Metropolitan Area. Frederick has long been an important crossroads, located at the intersection of a major north–south Indian trail and east–west routes to the Chesapeake Bay, both at Baltimore and what became Washington, D.C. and across the Appalachian mountains to the Ohio River watershed. It is a part of the Washington-Arlington-Alexandria, DC-VA-MD-WV Metropolitan Statistical Area, which is part of a greater Washington-Baltimore-Arlington, DC-MD-VA-WV-PA Combined Statistical Area. The city's population was 65,239 people at the 2010 United States Census, making it the second-largest incorporated city in Maryland, behind Baltimore. Frederick is home to Frederick Municipal Airport, which accommodates general aviation, and to the county's largest employer U.S. Army's Fort Detrick bioscience/communications research installation.
Very low frequency or VLF is the ITU designation for radio frequencies (RF) in the range of 3 to 30 kilohertz (kHz), corresponding to wavelengths from 100 to 10 kilometers, respectively. The band is also known as the myriameter band or myriameter wave as the wavelengths range from one to ten myriameters. Due to its limited bandwidth, audio (voice) transmission is highly impractical in this band, and therefore only low data rate coded signals are used. The VLF band is used for a few radio navigation services, government time radio stations and for secure military communication. Since VLF waves can penetrate at least 40 meters (120 ft) into saltwater, they are used for military communication with submarines.
The International Telecommunication Union uses an internationally agreed system for classifying radio frequency signals. Each type of radio emission is classified according to its bandwidth, method of modulation, nature of the modulating signal, and type of information transmitted on the carrier signal. It is based on characteristics of the signal, not on the transmitter used.
The year 1867 in architecture involved some significant architectural events and new buildings.
A test pilot is an aircraft pilot with additional training to fly and evaluate experimental, newly produced and modified aircraft with specific manoeuvres known as flight test techniques.
The Francis Scott Key Bridge, also known originally as the Outer Harbor Crossing or simply as the Key Bridge or Beltway Bridge, is a steel arch-shaped continuous through truss bridge spanning the lower Patapsco River and outer Baltimore Harbor / Port in Baltimore, Maryland, U.S.A.. The main span of 1,200 feet (366 m) is the third longest span of any continuous truss in the world. It is also the longest bridge in the Baltimore metropolitan area.
Francis Scott Key Bridge, Key Bridge, or FSK Bridge can refer to:
The Francis Scott Key Bridge, more commonly known as the Key Bridge, is a six-lane reinforced concrete arch bridge conveying U.S. Route 29 (US 29) traffic across the Potomac River between the Rosslyn neighborhood of Arlington County, Virginia, and the Georgetown neighborhood of Washington, D.C. Completed in 1923, it is Washington's oldest surviving road bridge across the Potomac River.
The Freiwillige Selbstkontrolle der Filmwirtschaft is a German motion picture rating system organization run by the Spitzenorganisation der Filmwirtschaft based in Wiesbaden.
Francis Buchholz is a German bass guitarist best known as a former member of the rock/hard rock band Scorpions from 1973 to 1992.
The International Geographical Union is an international geographical society. The first International Geographical Congress was held in Antwerp in 1871. Subsequent meetings led to the establishment of the permanent organization in Brussels, Belgium, in 1922.
Forsvarets Spesialkommando (FSK) is a special operations forces unit of the Norwegian Special Operation Forces. The unit was established in 1982 due to the increased risk of terrorist activity against Norwegian interests, including the oil platforms in the North Sea.
Fort Scott Municipal Airport is a city-owned public-use airport located four miles southwest of the central business district of Fort Scott, a city in Bourbon County, Kansas, United States.
Francis Scott Key High School is a four-year public high school in Union Bridge in Carroll County, Maryland, United States. The school is located near the west-central section of Carroll County.
Traitor's Gate is a 1964 West German-British co-production of a black-and-white crime film directed by Freddie Francis and starring Albert Lieven, Gary Raymond, Catherine Schell and Klaus Kinski. It was made by Rialto Film using Hammer Films' Freddie Francis and screenwriter Jimmy Sangster updating the 1927 novel The Traitor's Gate by Edgar Wallace to the mid-1960s. The film features a group of criminals planning to steal the Crown Jewels of the United Kingdom from the Tower of London.
IEC 61334, known as Distribution automation using distribution line carrier systems, is a standard for low-speed reliable power line communications by electricity meters, water meters and SCADA. It is also known as spread frequency-shift keying (S-FSK) and was formerly known as IEC 1334 before IEC's most recent renumbering. It is actually a series of standards describing the researched physical environment of power lines, a well-adapted physical layer, a workable low-power media access layer, and a management interface. Related standards use the physical layer, but not the higher layers.
Francis Joseph Meehan is a retired American diplomat who served as the United States Ambassador to several of the Eastern Bloc states during his career. His final posting was as United States Ambassador to East Germany.
