JJY - JJY

Japanese: JJY - ジェージェーワイ
JJY - JJY
This is the call sign (name) for the standard radio report that is continuously transmitted under the supervision of the Radio Research Laboratory of the Ministry of Posts and Telecommunications of Japan. The transmitting point of this radio wave is the Nazaki Radio Transmitter Station (latitude 36°11′ north, longitude 139°51′ east) in Miwa-machi, Sarushima-gun, Ibaraki Prefecture, and the transmission frequencies are five waves of 2.5, 5, 8, 10, and 15 MHz, all of which are standard frequencies determined by the atomic frequency standard of the Radio Research Laboratory in Koganei-shi, Tokyo, with a frequency accuracy of one in 100 billion (1× 10-11 ). In addition to the signal every second and the standard frequency of 1000 Hz music every five minutes, these five waves also carry recognition signals (call signs, time announcements, etc.) in the form of amplitude modulation.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
日本の郵政省電波研究所の監理の下に連続発射されている標準電波報時のコールサイン(呼名)である。この電波の送信点は茨城県猿島郡三和町にある名崎無線送信所(北緯36゜11′,東経139゜51′),発射周波数は2.5,5,8,10,15MHzの5波,いずれも東京都小金井市にある電波研究所の原子周波数標準によって決定された標準周波数で,周波数確度は1000億分の1(1×10-11)となっている。これら5波には毎秒信号および5分おきの1000Hz楽音標準周波数のほか,認識信号(コールサイン,時刻アナウンスなど)が振幅変調の形式で載せられている。

出典 株式会社平凡社世界大百科事典 第2版について 情報

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