Many countries have a nationally broadcast radio frequency time signal
of a standard timecode locked to the output from a cesium oscillator or
hydrogen master atomic clock. These are the same clocks from which the
UTC time standard is calculated and therefore all these stations transmit
very close to UTC time signal. The precision of these time-codes is, of
course, excellent! You can obtain more technical details with a clik on
the labels...
| |
City/
Country
|
Location:
LAT. / LON.
|
Frequency (kHz)
|
Form of the Time Signals
|
Signal transmission
|
|
MSF
|
Rugby
UK
|
52o 22' N
01o 11' W
|
60
|
Interruptions of the carrier of 100 ms for the Second pulses, of 500
ms for the minute pulses. The signal is given by the beginning of the interruption. |
continuous except for an interruption for maintenance from 10 h 0 m
to 14 h 0 m on the first Tuesday in each month. |
|
DCF77
|
Mainflingen
D
|
50o 01' N
09o 00' E
|
77.5
|
The second marks are reduced by 10dB; the reference point is the beginning
of the pulse modulation. The second 59 marker is omitted. |
continuous |
|
HBG
|
Prangins
CH
|
46o 24' N
06o 15' E
|
75
|
Interruption of the carrier at the beginning of each second, duration
100ms. The minutes are identified by a double pulse, the hours by a triple
pulse.
12/24h: 4 pulses. |
continuous |
|