RWM

RWM is the callsign of a shortwave radio station in Moscow, Russia. It is similar to WWV in that it broadcasts official time signals. However, unlike WWV, RWM does not broadcast any voice announcements, choosing instead to broadcast simple continuous wave signals. RWM transmits a 5 kW signal on the frequency of 4.996 MHz, and 8 kW signals on 9.996 and 14.996 MHz. These signals are best received anywhere in Europe, as well as in western Russia.

Between 0 and 8 minutes past the hour, RWM transmits a straight unmodulated carrier wave. At 9 minutes past, RWM identifies itself in Morse code. Between 10 and 20 minutes past the hour, RWM transmits a pulse of carrier every second, with the difference between UT1 and UTC in units of one-fiftieth of a second encoded onto the once-per-second pulses. And between 20 and 30 minutes past the hour, RWM transmits carrier pulses ten times each second. This transmission cycle is repeated every half hour.