Pierre-sur-Haute military radio station facts for kids
Quick facts for kids Pierre-sur-Haute military radio station |
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| Station hertzienne de Pierre-sur-Haute (French) | |
The military radio station of Pierre-sur-Haute. Two military towers are pictured: the Télédiffusion de France relay tower is in the centre, with the living quarters, and a helipad.
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 Pierre-sur-Haute military radio station
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| Coordinates | 45°39′11″N 3°48′30″E / 45.6531°N 3.8084°E |
| Type | Radio tower complex |
| Site information | |
| Controlled by | France |
| Site history | |
| Built | 1961 |
| Materials | Concrete, steel |
The Pierre-sur-Haute military radio station is a 30-hectare (74-acre) hill-top site used for French military communications. It has been in use since 1913. It is in the Sauvain and Job communes, with the boundary between the Rhône-Alpes and Auvergne regions passing through the site. There are three towers at the site. The tallest one is a 55-metre-high civilian telecommunication tower owned by Télédiffusion de France.
In April 2013, the French interior intelligence agency DCRI pressured the president of Wikimedia France into deleting the French-language Wikipedia article about the station. It was promptly restored by another Wikipedia contributor living in Switzerland. As a result of the controversy, the article temporarily became the most read page on the French Wikipedia, which was noted as an example of the Streisand effect.
History
In 1913, a semaphore telegraph station (French: télégraphe Chappe) was built where the military radio station is now. At the time, it was a small stone building, with the semaphore on top.
In 1961, during the Cold War, NATO asked the French Army to build the station as part of the 82-node transmission network in Europe known as the ACE High system. In this network, the Pierre-sur-Haute station, or FLYZ, was a relay between the Lachens (FNIZ) station to the south and the Mont-Août (FADZ) station to the north. The NATO radio station was using American-made tropospheric scatter equipment to relay voice and telegraph signals on a network stretching from Turkey to the Arctic Polar Circle in Norway. The French Air Force took control of the station in 1974. In the late 1980s, the system was gradually replaced by a combination of national defense systems and some NATO-owned subsystems. The large parabolic antennas, known locally as Mickey's ears, were replaced with the current two-antenna setup in 1991.
Role
The Pierre-sur-Haute station is controlled by the French Air Force and is a subsidiary of the Lyon – Mont Verdun Air Base, 80 km (50 mi) east the station. It is one of the four radio stations along France's north-south axis, in constant communication with the three others: Lacaune, Henrichemont and the Rochefort air base. The station is mainly used for transmissions relating to the command of operational units. If French nuclear weapons (force de dissuasion) were used, the fire order might pass through this relay.
The station has been part of the Commandement Air des Systèmes de Surveillance d'Information et de Communications (Air Command of Surveillance, Information and Communication Systems) since its creation on 1 June 1994; from 1 January 2006, it has been run by the Direction Interarmées des Réseaux d'Infrastructure et des Systèmes d'Information (Joint Directorate of Infrastructure Networks and Information Systems).
Infrastructure
The station is situated on a 30-hectare (74-acre) site between the communes of Sauvain and Job, straddling the border between the two departments of Loire and Puy-de-Dôme. The perimeter is surrounded by a high barrier of wood and metal.
Buildings
There are three towers at the site. The tallest one is a 55-metre (180 ft) high civilian telecommunication tower, owned by Télédiffusion de France. The telecommunication tower is topped by a radome and contains a mode S air traffic control radar beacon system owned by the Directorate General for Civil Aviation. The radar has been in operation since 18 August 2009 but has experienced malfunctions due to heavy snowfall in the area. The two remaining concrete towers are owned by the military. The 30-metre (98 ft) high structures have been used since 1991 for radio transmission and reception. These are built to withstand the blast of a nuclear explosion.
Some buildings are used as garages and living quarters, complete with kitchen, dining room and bedrooms. They are linked together by tunnels, 400 metres (1,300 ft) in total length, so as to avoid walking through thick snow in winter when moving from one building to the other. About 20 personnel are stationed on-site, including electricians, mechanics, and cooks.
Underground facilities
The most important part of the site is the underground section, used for transmissions dispatch: at a speed of 2 Mb/s, communications from the towers are analysed, then redirected to be transmitted. This part of the facility is supplied with chemical, biological, radiological, and nuclear defences. It defends against electromagnetic pulses using a Faraday cage. Positively pressured rooms help prevent contaminants from entering the facility. The facility has independent water and power supplies.
See also
In Spanish: Estación de radio militar de Pierre-sur-Haute para niños
