Standard frequency and time signal transmissions from the union observatory, Johannesburg

Deviations of frequencies and time signals are with respect to the weighted mean of six quartz oscillators, and time signals from WWV over 20-day intervals. A positive frequency deviation indicates that the frequency was high. A time deviation of 010 indicates that the time pulses were 0.010 second late on WWV while 990 indicates that they were 0.010 second early. A value of 46.3 milliseconds has been adopted for the propagation time of radio signals between Washington and Johannesburg.