Цифровые сигналы точного времени:
Time signals that can be used as references for radio clocks include:
NIST Broadcasts:
Longwave radio station WWVB at 60 kHz (binary coded decimal only) at 50 kW
Shortwave radio station WWV (a male voice, Fort Collins, Colorado, about 100 km north of Denver at approximately 40°40′49″N 105°02′27″W) at 2.5, 5, 10, 15 and 20 MHz at 2.5 kW to 10 kW. This voice signal is available by telephone at 1-303-499-7111.
Shortwave radio station WWVH (a female voice, on Kauai near Kekaha, Hawaii, at about 21°59′16″N 159°45′50″W) at 2.5, 5, 10, and 15 MHz at 2.5 kW to 10 kW
Canadian Broadcasts: The official time can be obtained by tuning to radio station CHU (Ottawa, Ontario) at 3.33, 7.85 and 14.67 MHz, with FSK digital time data sent once per minute at 300 baud
German Broadcasts: A time signal from DCF77 (Mainflingen, a transmitter near Frankfurt at 50 kW at about 50°01′N 9°00′E) can be received on 77.5 kHz to a range of about 2000 km
Russian Broadcasts: A time signal from RBU (Moscow, a transmitter at 10 kW at about 55°44′N 38°12′E) can be received on 66.66 kHz.
Swiss Broadcasts: The legal Swiss time can be picked up from the HBG longwave transmitter in Prangins on 75 kHz. The time code is compatible with that of the German DCF77 transmitter.
UK Broadcasts: A time signal from MSF, an atomic clock near Anthorn (which was relocated from Rugby on 2007-04-01) can be received on 60 kHz
French Broadcasts: Station TDF transmits timecodes on 162 kHz by phase modulation of the Allouis longwave broadcasting station.
The JJY radio stations in Japan on 40/60 kHz
The BPM radio station in Xi'an, China at 2.5, 5, 10 and 15 MHz