Anthorn Radio Station
Anthorn Radio Station is located near Anthorn, Cumbria, England, overlooking the Solway Firth.
It has three transmitters: one VLF; one LF; and an eLORAN transmitter.
The VLF transmitter is used primarily for transmitting orders to submarines on 19.6 kHz. Its callsign is GQD. VLF transmissions are relatively unaffected by atmospheric nuclear explosions and Anthorn was once part of the link between Fylingdales early warning radar, North Yorkshire, and the United States' air defence system.
It is a NATO facility, controlled from Northwood Headquarters along with three other VLF transmitters in Norway, Germany and Italy.
LF transmitter: National Physical Laboratory time signal
The National Physical Laboratory (NPL) has installed three atomic clocks at Anthorn and on 27 February 2007 Britainâs national time signal transmissions, retaining their original call sign of MSF, were transferred there on a trial basis, moving formally on 1 April 2007.
LORAN
The General Lighthouse Authorities for Britain and Ireland have contracted VT Communications to develop eLORAN (enhanced LORAN) radio navigational aid for mariners. The transmitter is at Anthorn.
Antenna system
The antenna system consists of thirteen masts, each 227 metres (745 ft) tall, which are arranged in two rings around the central mast. The VLF antenna consists of four rhombic antennas hung on large insulators on the masts, which are all grounded.
The LF antenna is a T-antenna spun between two masts.
Anthorn Radio Station
Anthorn Radio Station is located near Anthorn, Cumbria, England, overlooking the Solway Firth.
It has three transmitters: one VLF; one LF; and an eLORAN transmitter.
The VLF transmitter is used primarily for transmitting orders to submarines on 19.6 kHz. Its callsign is GQD. VLF transmissions are relatively unaffected by atmospheric nuclear explosions and Anthorn was once part of the link between Fylingdales early warning radar, North Yorkshire, and the United States' air defence system.
It is a NATO facility, controlled from Northwood Headquarters along with three other VLF transmitters in Norway, Germany and Italy.
LF transmitter: National Physical Laboratory time signal
The National Physical Laboratory (NPL) has installed three atomic clocks at Anthorn and on 27 February 2007 Britainâs national time signal transmissions, retaining their original call sign of MSF, were transferred there on a trial basis, moving formally on 1 April 2007.
LORAN
The General Lighthouse Authorities for Britain and Ireland have contracted VT Communications to develop eLORAN (enhanced LORAN) radio navigational aid for mariners. The transmitter is at Anthorn.
Antenna system
The antenna system consists of thirteen masts, each 227 metres (745 ft) tall, which are arranged in two rings around the central mast. The VLF antenna consists of four rhombic antennas hung on large insulators on the masts, which are all grounded.
The LF antenna is a T-antenna spun between two masts.