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Jan Mayen is a Norwegian volcanic island in the Arctic Ocean with no permanent population. It is 55 km (34 mi) long (southwest-northeast) and 373 km2 (144 sq mi) in area, partly covered by glaciers. It has two parts: larger northeast Nord-Jan and smaller Sør-Jan, linked by a 2.5 km (1.6 mi) wide isthmus. It lies 600 km (370 mi) northeast of Iceland, 500 km (310 mi) east of central Greenland, and 900 km (560 mi) northwest of Vesterålen, Norway. The island is mountainous, the highest summit being the Beerenberg volcano in the north. The isthmus is the location of the two largest lakes of the island, Sørlaguna and Nordlaguna. A third lake is called Ullerenglaguna. Jan Mayen was formed by the Jan Mayen hotspot and is defined by geologists as a microcontinent.
Low frequency (LF) is the ITU designation for radio frequencies (RF) in the range of 30–300 kHz. Since its wavelengths range from 10–1 km, respectively, it is also known as the kilometre band or kilometre wave.
Svalbard and Jan Mayen is a statistical designation defined by ISO 3166-1 for a collective grouping of two remote jurisdictions of Norway: Svalbard and Jan Mayen. While the two are combined for the purposes of the International Organization for Standardization (ISO) category, they are not administratively related. This has further resulted in the country code top-level domain .sj being issued for Svalbard and Jan Mayen, and ISO 3166-2:SJ. The United Nations Statistics Division also uses this code, but has named it the Svalbard and Jan Mayen Islands.
OMEGA was the first global-range radio navigation system, operated by the United States in cooperation with six partner nations. It was a hyperbolic navigation system, enabling ships and aircraft to determine their position by receiving very low frequency (VLF) radio signals in the range 10 to 14 kHz, transmitted by a global network of eight fixed terrestrial radio beacons, using a navigation receiver unit. It became operational around 1971 and was shut down in 1997 in favour of the Global Positioning System.
The Hellissandur longwave radio mast is a 412 m (1,352 ft) tall guyed radio mast used for longwave radio transmissions of RÚV. It is situated at Gufuskálar[ˈkʏːvʏˌskauːlar̥], near Hellissandur on the Snæfellsnes peninsula of West Iceland. It is currently the tallest longwave radio mast in the world.
The Mühlacker Broadcasting Transmission Facility is a radio transmission facility near Mühlacker, Germany, first put into service on November 21, 1930. It uses two guyed steel tube masts as aerials and one guyed steel framework mast, which are insulated against ground. It has two transmission aerials for shortwave and one free standing steel framework tower for directional radio services. The shortwave transmitter was shut off on October 19, 2004. The medium wave transmitter was switched off in January 2012.
The LORAN-C transmitter Rantum is a transmission facility for LORAN-C on the German island Sylt near the village Rantum at 54°48′30″N8°17′37″E. It was established in the 1960s, initially using a guyed steel framework mast with a triangular cross section, approximately 190 metres tall. In 1996 this mast was replaced by a 193-metre-high mast of the same type but of a better mechanical design. The new mast is, as its forerunner, insulated from ground and has a triangular cross section. The construction, weighing 65 tonnes, is guyed in four levels at 60.52 metres (198.6 ft), 120.87 metres (396.6 ft), 154.95 metres (508.4 ft) and 190 metres (620 ft). The transmitter was shut down on Dec 31, 2015.
The Domžale radio transmitter is a facility for medium wave broadcasting in Domžale, in Slovenia. The transmitter is fully transistorized. It could be received easily at a medium wave frequency of 918 kHz across the whole of Europe at night-time. It was the strongest radio transmitter of the Republic of Slovenia, broadcasting the first national radio channel.
Olonkinbyen is the only settlement on the Norwegian island of Jan Mayen. It was named after Russian-Norwegian explorer Gennady Olonkin.
Jan Mayensfield is an aerodrome serving Olonkinbyen in Jan Mayen, Norway. Operated by the Norwegian Armed Forces, it serves the island's only population at the combined military and meteorological station. It has a 1,500-meter (4,921 ft) dirt runway numbered 06–24.
Iwo Jima LORAN-C transmitter was a LORAN-C transmitter at Iwo Jima, Japan of Grid 9970 at 24°48′8″N141°19′32″E. The Iwo Jima LORAN-C transmitter had a transmission power of 4 megawatts, which is more than the most powerful broadcasting stations. The Iwo Jima LORAN-C transmitter had a 411.5 meter (1350 ft) tall guyed mast, which was built in 1963. A guy wire insulator eyebolt failed sending the insulator crashing into the tower, knocking it out of plumb. It collapsed in 1964 on repair of the structural damage caused by the insulator. The collapsing tower killed four construction contract workers, three on the tower and one on the ground. The collapse also destroyed the transmitter building.
The Cape Race LORAN-C transmitter was a LORAN-C transmitter at Cape Race, Newfoundland and Labrador, on Canada's eastern seaboard.
Angissoq LORAN-C transmitter was a LORAN-C transmitter at Nanortalik-Angissoq, Greenland at GRI 7930, 59°59'18"N, 45°10'24" W. It had a transmission power of 1000 kilowatts. Until July 27, 1964, it used a 1350 ft mast radiator, built in 1963. On July 27, 1964, it collapsed from the fatigue failure of an eyebolt head in a compression cone insulator on a structural guy. It was replaced by a 704 ft mast radiator. On December 31, 1994, the transmitter was shut down and the tower dismantled.
Marcus Island LORAN-C transmitter, or Minami Torishima LORAN-C transmitter, is a former LORAN-C transmitter on Minami-Tori-shima in Ogasawara, Tokyo, Japan at. Until 1993 it was part of Grid 9970 and used a transmission power of 4000 kilowatts, which was more than the most powerful broadcasting stations ever used.
LORAN-C transmitter Ejde was the Master station of the Ejde LORAN-C Chain. It used a transmission power of 400 kW. Ejde LORAN-C transmitter, situated near Eiði at. Ejde LORAN-C transmitter used as antenna a 190.5 metre tall mast radiator. In 1962 the mast of LORAN-C transmitter Ejde collapsed as a result of a slipping guy rope. The mast has been demolished.
Coast Guard LORAN-C Station Estartit was the Zulu secondary station of the Mediterranean Sea LORAN-C Chain. It used a transmission power of 165 kW. Estartit LORAN-C transmitter, was situated near Estartit at. Estartit LORAN-C transmitter used as antenna a 190.5 metre tall mast radiator.
LORAN-C transmitter Jupiter was the Yankee secondary station of the Southeast U.S. LORAN-C Chain. It was operated from years 1962 to 2010 by the U.S. Coast Guard, located on Florida land that was originally Camp Murphy and now Jonathan Dickinson State Park, near the town of Jupiter, Florida. The choice of this site followed the earlier LORAN-A station established in 1957 nearby on the Atlantic beach at Hobe Sound.
LORAN-C transmitter Johnston Island was a LORAN-C transmitter on Johnston Atoll, in the mid-Pacific Ocean. It was in service until July 1, 1992, and used as antenna a 190.5 metre (625 ft) tall mast radiator and a transmission power of 275 kW.
Ravensburg-Horgenzell transmitter was a mediumwave broadcasting facility of Deutsche Telekom used for transmitting the program of Deutschlandfunk on the area of community Horgenzell northwest of Ravensburg in Baden-Württemberg. It was inaugurated on August 23, 1951, and used until 1959 for transmitting the radio programme of SWF with a transmission power of 40 kW on 1538 kHz. As antenna, it used a 120 metre tall guyed ground-fed lattice steel mast radiator at 47°47'10" N and 9°31'16" E.
References
- ↑ "Loran Station Jan Mayer". www.loran-history.info. Archived from the original on 2015-10-14. Retrieved 2016-12-30.
- 1 2 Loran-C has been established in 1960
- ↑ "Loran-C Bø". 2015-10-31. Archived from the original on 2015-10-31. Retrieved 2016-12-30.
{{cite web}}: CS1 maint: bot: original URL status unknown (link) - ↑ "Loran C er historie" (in Norwegian).