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19 relations: Antenna (radio), Aurora, Effective radiated power, EISCAT, Gakona, Alaska, High Frequency Active Auroral Research Program, HIPAS Observatory, Incoherent scatter, Ionosphere, Longyearbyen, Luxemburg–Gorky effect, Nizhny Novgorod, Norway, Russia, Sura Ionospheric Heating Facility, Svalbard, Tromsø, University Centre in Svalbard, Vasilsursk.
Antenna (radio)
In radio, an antenna is the interface between radio waves propagating through space and electric currents moving in metal conductors, used with a transmitter or receiver.
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Aurora
An aurora (plural: auroras or aurorae), sometimes referred to as polar lights, northern lights (aurora borealis) or southern lights (aurora australis), is a natural light display in the Earth's sky, predominantly seen in the high-latitude regions (around the Arctic and Antarctic).
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Effective radiated power
Effective radiated power (ERP), synonymous with equivalent radiated power, is an IEEE standardized definition of directional radio frequency (RF) power, such as that emitted by a radio transmitter.
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EISCAT
EISCAT (European Incoherent Scatter Scientific Association) operates three incoherent scatter radar systems, at 224 MHz, 931 MHz in Northern Scandinavia and one at 500 MHz on Svalbard, used to study the interaction between the Sun and the Earth as revealed by disturbances in the ionosphere and magnetosphere.
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Gakona, Alaska
Gakona (Ggax Kuna’ in Ahtna Athabascan) is a census-designated place (CDP) in the Valdez-Cordova Census Area in the U.S. state of Alaska.
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High Frequency Active Auroral Research Program
The High Frequency Active Auroral Research Program (HAARP) was initiated as an ionospheric research program jointly funded by the U.S. Air Force, the U.S. Navy, the University of Alaska Fairbanks, and the Defense Advanced Research Projects Agency (DARPA).
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HIPAS Observatory
The HIPAS (HIgh Power Auroral Stimulation) Observatory was a research facility intended to study the ionosphere and its influence on radio communications.
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Incoherent scatter
Incoherent scattering is a type of scattering phenomenon in physics.
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Ionosphere
The ionosphere is the ionized part of Earth's upper atmosphere, from about to altitude, a region that includes the thermosphere and parts of the mesosphere and exosphere.
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Longyearbyen
Longyearbyen ((literally The Longyear Town) is the largest settlement and the administrative centre of Svalbard, Norway., the town had a population of 2,144. Longyearbyen is located in the Longyear Valley and on the shore of Adventfjorden, a bay of Isfjorden located on the west coast of Spitsbergen. Since 2002, Longyearbyen Community Council has had many of the same responsibilities of a municipality, including utilities, education, cultural facilities, fire brigade, roads and ports. The town is the seat of the Governor of Svalbard. It is the world's northernmost settlement of any kind with more than 1,000 permanent residents. Known as Longyear City until 1926, the town was established by and named after John Munro Longyear, whose Arctic Coal Company started coal mining operations in 1906. Operations were taken over by Store Norske Spitsbergen Kulkompani (SNSK) in 1916, which still conducts mining. The town was almost completely destroyed by the German Kriegsmarine on 8 August 1943, but was rebuilt after the Second World War. Traditionally, Longyearbyen was a company town, but most mining operations have moved to Sveagruva since the 1990s, while the town has seen a large increase in tourism and research. This has seen the arrival of institutions such as the University Centre in Svalbard, the Svalbard Global Seed Vault and Svalbard Satellite Station. The community is served by Svalbard Airport and Svalbard Church.
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Luxemburg–Gorky effect
In radiophysics, the Luxemburg–Gorky effect (named after Radio Luxemburg and the city of Gorky (Nizhny Novgorod)) is a phenomenon of cross modulation between two radio waves, one of which is strong, passing through the same part of a medium, especially a conductive region of atmosphere or a plasma.
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Nizhny Novgorod
Nizhny Novgorod (p), colloquially shortened to Nizhny, is a city in Russia and the administrative center (capital) of Volga Federal District and Nizhny Novgorod Oblast.
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Norway
Norway (Norwegian: (Bokmål) or (Nynorsk); Norga), officially the Kingdom of Norway, is a unitary sovereign state whose territory comprises the western portion of the Scandinavian Peninsula plus the remote island of Jan Mayen and the archipelago of Svalbard.
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Russia
Russia (rɐˈsʲijə), officially the Russian Federation (p), is a country in Eurasia. At, Russia is the largest country in the world by area, covering more than one-eighth of the Earth's inhabited land area, and the ninth most populous, with over 144 million people as of December 2017, excluding Crimea. About 77% of the population live in the western, European part of the country. Russia's capital Moscow is one of the largest cities in the world; other major cities include Saint Petersburg, Novosibirsk, Yekaterinburg and Nizhny Novgorod. Extending across the entirety of Northern Asia and much of Eastern Europe, Russia spans eleven time zones and incorporates a wide range of environments and landforms. From northwest to southeast, Russia shares land borders with Norway, Finland, Estonia, Latvia, Lithuania and Poland (both with Kaliningrad Oblast), Belarus, Ukraine, Georgia, Azerbaijan, Kazakhstan, China, Mongolia and North Korea. It shares maritime borders with Japan by the Sea of Okhotsk and the U.S. state of Alaska across the Bering Strait. The East Slavs emerged as a recognizable group in Europe between the 3rd and 8th centuries AD. Founded and ruled by a Varangian warrior elite and their descendants, the medieval state of Rus arose in the 9th century. In 988 it adopted Orthodox Christianity from the Byzantine Empire, beginning the synthesis of Byzantine and Slavic cultures that defined Russian culture for the next millennium. Rus' ultimately disintegrated into a number of smaller states; most of the Rus' lands were overrun by the Mongol invasion and became tributaries of the nomadic Golden Horde in the 13th century. The Grand Duchy of Moscow gradually reunified the surrounding Russian principalities, achieved independence from the Golden Horde. By the 18th century, the nation had greatly expanded through conquest, annexation, and exploration to become the Russian Empire, which was the third largest empire in history, stretching from Poland on the west to Alaska on the east. Following the Russian Revolution, the Russian Soviet Federative Socialist Republic became the largest and leading constituent of the Union of Soviet Socialist Republics, the world's first constitutionally socialist state. The Soviet Union played a decisive role in the Allied victory in World War II, and emerged as a recognized superpower and rival to the United States during the Cold War. The Soviet era saw some of the most significant technological achievements of the 20th century, including the world's first human-made satellite and the launching of the first humans in space. By the end of 1990, the Soviet Union had the world's second largest economy, largest standing military in the world and the largest stockpile of weapons of mass destruction. Following the dissolution of the Soviet Union in 1991, twelve independent republics emerged from the USSR: Russia, Ukraine, Belarus, Kazakhstan, Uzbekistan, Armenia, Azerbaijan, Georgia, Kyrgyzstan, Moldova, Tajikistan, Turkmenistan and the Baltic states regained independence: Estonia, Latvia, Lithuania; the Russian SFSR reconstituted itself as the Russian Federation and is recognized as the continuing legal personality and a successor of the Soviet Union. It is governed as a federal semi-presidential republic. The Russian economy ranks as the twelfth largest by nominal GDP and sixth largest by purchasing power parity in 2015. Russia's extensive mineral and energy resources are the largest such reserves in the world, making it one of the leading producers of oil and natural gas globally. The country is one of the five recognized nuclear weapons states and possesses the largest stockpile of weapons of mass destruction. Russia is a great power as well as a regional power and has been characterised as a potential superpower. It is a permanent member of the United Nations Security Council and an active global partner of ASEAN, as well as a member of the G20, the Shanghai Cooperation Organisation (SCO), the Council of Europe, the Asia-Pacific Economic Cooperation (APEC), the Organization for Security and Co-operation in Europe (OSCE), and the World Trade Organization (WTO), as well as being the leading member of the Commonwealth of Independent States (CIS), the Collective Security Treaty Organization (CSTO) and one of the five members of the Eurasian Economic Union (EEU), along with Armenia, Belarus, Kazakhstan and Kyrgyzstan.
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Sura Ionospheric Heating Facility
The Sura Ionospheric Heating Facility, located near the small town of Vasilsursk about 100 km eastward from Nizhniy Novgorod in Russia, is a laboratory for ionosphere research.
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Svalbard
Svalbard (prior to 1925 known by its Dutch name Spitsbergen, still the name of its largest island) is a Norwegian archipelago in the Arctic Ocean.
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Tromsø
Tromsø (Romsa; Tromssa; Tromssa) is a city and municipality in Troms county, Norway.
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University Centre in Svalbard
The University Centre in Svalbard (Universitetssenteret på Svalbard AS; UNIS) is a Norwegian state-owned limited company that is involved in research and provides some university-level education in Arctic studies.
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Vasilsursk
Vasilsursk (Васильсу́рск) is an urban locality (a work settlement) in Vorotynsky District of Nizhny Novgorod Oblast, Russia, located on the Sura River, not far from its fall into the Volga.
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