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HF-GCS
The High Frequency Global Communications System (HFGCS) is a network of single sideband shortwave transmitters of the United States Air Force which is used to communicate with aircraft in flight, ground stations and some United States Navy surface assets. All worldwide receiving and transmitting sites in the HFGCS system are remotely controlled from Andrews Air Force Base and Grand Forks Air Force Base. Before 1 October 2002 it was known as the Global High Frequency System (GHFS). HFGCS stations tend to operate in the aviation bands clustered around 5, 6, 8 and 11/12 MHz, although other frequencies are in use. The primary HFGCS voice frequencies are 4724.0 kHz, 8992.0 kHz, 11175.0 kHz, and 15016.0 kHz. In addition to the HFGCS, U.S. aircraft frequently use Military Auxiliary Radio System (MARS) HF stations (13927.0 kHz) and Canadian Forces HF stations (11232.0 kHz) to relay messages. Various other discrete frequencies are available, and used, as p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HFGCS On 11175khz
The High Frequency Global Communications System (HFGCS) is a network of single sideband shortwave transmitters of the United States Air Force which is used to communicate with aircraft in flight, ground stations and some United States Navy surface assets. All worldwide receiving and transmitting sites in the HFGCS system are remotely controlled from Andrews Air Force Base and Grand Forks Air Force Base. Before 1 October 2002 it was known as the Global High Frequency System (GHFS). HFGCS stations tend to operate in the aviation bands clustered around 5, 6, 8 and 11/12 MHz, although other frequencies are in use. The primary HFGCS voice frequencies are 4724.0 kHz, 8992.0 kHz, 11175.0 kHz, and 15016.0 kHz. In addition to the HFGCS, U.S. aircraft frequently use Military Auxiliary Radio System (MARS) HF stations (13927.0 kHz) and Canadian Forces HF stations (11232.0 kHz) to relay messages. Various other discrete frequencies are available, and used, as p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Emergency Action Messages
In the United States military's strategic nuclear weapon nuclear command and control (NC2) system, an Emergency Action Message (EAM) is a preformatted message that directs nuclear-capable forces to execute specific Major Attack Options (MAOs) or Limited Attack Options (LAOs) in a nuclear war. They are the military commands that the US military chain of command would use to launch a nuclear strike. Individual countries or specific regions may be included or withheld in the EAM, as specified in the Single Integrated Operational Plan (SIOP). The SIOP was updated annually until February 2003, when it was replaced by Operations Plan (OPLAN) 8044. Since July 2012, the US nuclear war plan has been OPLAN 8010-12, ''Strategic Deterrence and Force Employment''. Overview EAMs use cryptographic protocols (including such methods as digital signatures) to authenticate the messages, thereby ensuring that they cannot be forged or altered. In the United States, the EAM will be issued from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Single Sideband
In radio communications, single-sideband modulation (SSB) or single-sideband suppressed-carrier modulation (SSB-SC) is a type of modulation used to transmit information, such as an audio signal, by radio waves. A refinement of amplitude modulation, it uses transmitter power and bandwidth more efficiently. Amplitude modulation produces an output signal the bandwidth of which is twice the maximum frequency of the original baseband signal. Single-sideband modulation avoids this bandwidth increase, and the power wasted on a carrier, at the cost of increased device complexity and more difficult tuning at the receiver. Basic concept Radio transmitters work by mixing a radio frequency (RF) signal of a specific frequency, the carrier wave, with the audio signal to be broadcast. In AM transmitters this mixing usually takes place in the final RF amplifier (high level modulation). It is less common and much less efficient to do the mixing at low power and then amplify it in a linear ampl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Joint Base Pearl Harbor–Hickam
Joint Base Pearl Harbor–Hickam (JBPHH) is a United States military base on the island of Oahu, Hawaii. It is Joint Base, an amalgamation of the United States Air Force's Hickam Air Force Base and the United States Navy's Naval Station Pearl Harbor, which were merged in 2010. Joint Base Pearl Harbor–Hickam is one of 12 Joint Bases the 2005 Base Realignment and Closure Commission created. It is part of Navy Region Hawaii and provides Navy and joint operations Base Operating Support that is capabilities-based and integrated. Naval Station Pearl Harbor Pearl Harbor is from Honolulu. Naval Station Pearl Harbor provides berthing and shore side support to surface ships and submarines, as well as maintenance and training. Pearl Harbor can accommodate the largest ships in the fleet, to include dry dock services, and is now home to over 160 commands. Housing, personnel, and family support are also provided and are an integral part of the shore side activities, which encompasses ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Loring Air Force Base
Loring Air Force Base was a United States Air Force installation in northeastern Maine, near Limestone and Caribou in Aroostook County. It was one of the largest bases of the U.S. Air Force's Strategic Air Command during its existence, and was transferred to the newly created Air Combat Command in 1992. The base's origins began in 1947 with an order for construction of an airfield by the New England Division of the United States Army Corps of Engineers. The chosen site, in northeastern Maine within both Limestone Township and Caswell Plantation, was the closest point in the continental U.S. to Europe, providing high strategic value during the Cold War. The base was originally named Limestone Army Air Field, and was renamed Limestone Air Force Base following the establishment of the Air Force in 1947. It was named in 1954 for Major Charles J. Loring, Jr., USAF, a Medal of Honor recipient during the Korean War. From 1951 to 1962, it was co-located next to Caribou Air Force Statio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Naval Air Station Keflavík
Naval Air Station Keflavik (NASKEF) was a United States Navy station at Keflavík International Airport, Iceland, located on the Reykjanes peninsula on the south-west portion of the island. NASKEF was closed on 8 September 2006, and its facilities were taken over by the Icelandic Defence Agency as their primary base until 1 January 2011, when the Agency was abolished and the base handed over to the Icelandic Coast Guard, which has since then operated the base. The base was built during World War II by the United States Army as part of its mission to maintain the defense of Iceland and secure northern Atlantic air routes. It served to ferry personnel, equipment, and supplies to Europe. Intended as a temporary wartime base under an agreement with Iceland and the British, U.S. forces withdrew by 1947 but returned in 1951 as the Iceland Defense Force resident on a North Atlantic Treaty Organization (NATO) base. The base was regularly visited by the American military and other NATO al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Greenland
Greenland ( kl, Kalaallit Nunaat, ; da, Grønland, ) is an island country in North America that is part of the Kingdom of Denmark. It is located between the Arctic and Atlantic oceans, east of the Canadian Arctic Archipelago. Greenland is the world's largest island. It is one of three constituent countries that form the Kingdom of Denmark, along with Denmark and the Faroe Islands; the citizens of these countries are all citizens of Denmark and the European Union. Greenland's capital is Nuuk. Though a part of the continent of North America, Greenland has been politically and culturally associated with Europe (specifically Norway and Denmark, the colonial powers) for more than a millennium, beginning in 986.The Fate of Greenland's Vikings , by Dale Mackenzie Brown, ''Archaeological Institute of America'', ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thule Air Base
Thule Air Base (pronounced or , kl, Qaanaaq Mitarfik, da, Thule Lufthavn), or Thule Air Base/Pituffik Airport , is the United States Space Force's northernmost base, and the northernmost installation of the U.S. Armed Forces, located north of the Arctic Circle and from the North Pole on the northwest coast of the island of Greenland. Thule's arctic environment includes icebergs in North Star Bay, two islands ( Saunders Island and Wolstenholme Island), a polar ice sheet, and Wolstenholme Fjord – the only place on Earth where four active glaciers join together. The base is home to a substantial portion of the global network of missile warning sensors of Space Delta 4, and space surveillance and space control sensors of Space Delta 2, providing space awareness and advanced missile detection capabilities to North American Aerospace Defense Command (NORAD), the United States Space Force, and joint partners. Thule Air Base is also home to the 821st Air Base Group and is respons ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yokota Air Base
, is a Japan Air Self-Defense Force (JASDF) and United States Air Force (USAF) base in the Tama Area, or Western Tokyo. It occupies portions of Akishima, Fussa, Hamura, Mizuho, Musashimurayama, and Tachikawa. The base houses 14,000 personnel. It occupies a total area of and has a runway. It features the JASDF Air Defense Command Headquarters (ADC headquarters) since 26 March 2012. The headquarters of United States Forces Japan is also located there. Other base facilities are the broadcast center for the American Forces Network Tokyo radio service and a detachment of Pacific Air Forces' Band of the Pacific. History Tama Airfield The facility which houses Yokota Air Base was originally constructed by the Imperial Japanese Army (IJA) in 1940 as Tama Airfield, and used as a flight test center. During World War II Yokota became the center of Japanese Army Air Forces flight test activities and the base was the site of the first meeting between Japanese and Italian wartime allies ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Naval Air Station Sigonella
Naval Air Station (NAS) Sigonella is an Italian Air Force base ('' it, Aeroporto "Cosimo Di Palma" di Sigonella''), and a U.S. Navy installation at Italian Air Force Base Sigonella in Sicily, Italy. The whole NAS is a tenant of the Italian Air Force, which has the military and the administrative control. It serves as an Italian base for the 41º Stormo Antisom (41st Antisubmarine Warfare Wing). NAS Sigonella acts also as landlord to more than 40 other U.S. commands and activities. It is located west and south of the city of Catania, and some south of Mount Etna. The NAS is located in the western part of the large airport structure, while the Italian military base is located in the eastern part. Because of its location near the center of the Mediterranean Sea, NASSIG is well placed to support operations by the U.S. 6th Fleet, other U.S. military units, and U.S. allies and coalition partners. Among the aircraft that fly from this island base are Italian Air Force ATR 72MP ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salinas, Puerto Rico
Salinas (, ) is a town and municipality in the southern part of Puerto Rico located in the southern coast of the island, south of Aibonito and Cayey; southeast of Coamo, east of Santa Isabel; and west of Guayama. Salinas is spread over 5 barrios and Salinas Pueblo (the downtown area and the administrative center of the city). It has long been a fishing spot for Puerto Ricans, known for its beaches, fish variety and the birthplace of the famous "mojo isleño". Although Salinas doesn't have any commercial airports, there is a military training area there, Camp Santiago, which is one of the training centers of the Puerto Rico National Guard. Army National Guard, Air National Guard, State Guard, U.S. Army ROTC, U.S. Army Reserve and the U.S. Army also conduct military training at Camp Santiago. History Salinas was founded in 1840. On July 22, 1841, its first municipal council was established by Don Agustín Colón Pacheco as Mayor, Don Jose Maria Cadavedo as Sargent of Arms, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nebraska
Nebraska () is a state in the Midwestern region of the United States. It is bordered by South Dakota to the north; Iowa to the east and Missouri to the southeast, both across the Missouri River; Kansas to the south; Colorado to the southwest; and Wyoming to the west. It is the only triply landlocked U.S. state. Indigenous peoples, including Omaha, Missouria, Ponca, Pawnee, Otoe, and various branches of the Lakota ( Sioux) tribes, lived in the region for thousands of years before European exploration. The state is crossed by many historic trails, including that of the Lewis and Clark Expedition. Nebraska's area is just over with a population of over 1.9 million. Its capital is Lincoln, and its largest city is Omaha, which is on the Missouri River. Nebraska was admitted into the United States in 1867, two years after the end of the American Civil War. The Nebraska Legislature is unlike any other American legislature in that it is unicameral, and its members are elected ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
