G-Shock MRG-8100B-1A - Manual (Page 26)

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Calibration Signal
The Japanese calibration signal (Call Sign: JJY) is maintained • •
by the National Institute of Information and Communications
Technology (NICT). It is transmitted 24 hours a day from Mt.
Otakadoya (40 kHz) located in Tamura-gun, Fukushima Prefecture,
and from Mt. Hagane (60 kHz) located on the border between
Saga Prefecture and Fukuoka Prefecture.
The Chinese time calibration signal (BPC) is maintained by
• •
National Time Service center (NTSC) of China and is transmitted
from Shangqiu.
The U.S. calibration signal (Call Sign: WWVB) is transmitted by the
• •
National Institute of Standards and technology from Fort Collins,
Colorado.
The U.K. calibration signal (Call Sign: MSF) is transmitted by the
• •
National Physical Laboratory (NPL) from Anthorn, which is located
near Anthorn, Cumbria.
The German calibration signal (Call Sign: DCF77) is transmitted
• •
by Physikalisch - Technische Bundesanstalt (PTB) in Mainflingen,
which is located southeast of Frankfurt.
Time calibration signal frequencies and transmitter locations are
• •
subject to change.