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JJY
JJY is the call sign of a low frequency time signal radio station.
The station is located in Japan and broadcasts from two sites, one on Mount Otakadoya, near Fukushima, and the other on Mount Hagane, located on Kyushu Island. JJY is operated by the National Institute of Information and Communications Technology (NICT), an independent administrative institution affiliated with the Ministry of Internal Affairs and Communications of the Japanese government.
== Transmission sites ==
The Mount Otakadoya site () is located at an elevation of 790 meters (2,590 ft). It broadcasts a 50 kW signal (13 kW ERP) on 40 kHz from an umbrella top-loading antenna situated 250 meters (820 ft) above the ground. it has been powered down and evacuated due to the Fukushima I nuclear accidents. As of April 21 it is broadcasting again but is unattended by staff. It went off air again temporary on April 25 due to lightning, but has ever since been on air.
The Mount Hagane site () is located at an elevation of 900 meters (2,950 ft). It broadcasts a 50 kW signal (23 kW ERP) on 60 kHz to avoid interfering with the Otakadoya site as their signals overlap. The antenna for the Hagane site is also an umbrella top loading antenna and is situated 200 meters (650 ft) above the ground. This site does not have a redundant 40 kHz transmitter, so cannot act as a fallback for the Mount Otakadoya site.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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