Radio Time Signals

The radio signals listed below may be of use to observers. The stations transmit Coordinated Universal Time (UTC). The transmissions also carry a coded correction so that it is possible to convert UTC to UT1. However, observers should always report their observations in UTC.

Station
(Country)
Call SignTransmission
Frequencies
(kHz)
Times of
Transmission
Details of Signal
Anthorn
UK
MSF60continuousMinute marker 500ms, seconds 100ms. More details & maintenance: www.npl.co.uk
Mainflingen
(Germany)
DCF7777.5continuousSecond marker 100ms (59s omitted); minute marker 500ms.
Prangins
(Switzerland)
HBG75continuousMarkers interruption of carrier wave. Second marker 10ms; minute marker double pulse; hour marker triple pulse.
NB: Ceased at the end of 2011. Use DCF77 instead.
Espoo
Finland
MIKES25000continuousMore info.
Moscow
(Russia)
RWM4996
9996
14996
continuous
continuous
continuous
Except 08 & 38m past hr.
Morse ID at 09 & 39m.
 
Fort Collins
(U.S.A.)
WWV2500
5000
10000
15000
20000
continuousSecond marker 5ms pulse (29s and 59s omitted); minute marker 800ms pulse male voice announcement 52s-60s.
Kauai
(Hawaii)
WWVH2500
5000
10000
15000
continuousSecond marker 5ms pulse (29s and 59s omitted); minute marker 800ms pulse female voice announcement 45s-52.5s.
Ottawa
(Canada)
CHU3330
7850
14670
continuousSecond marker 01s-28s, 30s-50s; minute marker 500ms pulse; 51s-59s. Long hour marker.
Linshan (Pucheng)
(China)
BPM5000
10000
15000
 
continuous
continuous
0100-0900
Z transmission
Second marker 10 ms; minute marker continuous 30 ms. Call sign in Morse and voice at 29-30m and 59-60m. UTC time signals given out at 00-10, 15-25, 30-40, 45 -55m.
Chung-Li
(Taiwan)
BSF5000
15000
continuous
except
35-40 m
Second marker 5ms; minute marker 300ms.
Taejon
(South Korea)
HLA5000continuousSecond marker 20ms, minute marker Mon.-Fri. 800ms at 1000Hz tone; hour marker 800ms at 1500Hz tone; voice announcement at 52s.
Nazaki
(Japan)
JG2AS/
JJF-2
40continuousSecond marker 500ms; 59th second 200-ms interruption of carrier wave; Morse call sign at 15 and 45m.
Buenos Aires
(Argentina)
LOL11000014-1500Z weekdays onlyVoice announcement every 5 mins and 5ms marker pulses.
Caracas
(Venezuela)
YVTO5000continuousSecond marker 100ms pulse voice announcement of time every minute; minute marker 500ms pulse 30s marker omitted.

Section Director
Steve Harvey

Section Director, Steve Harvey

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