21. All chronometers and watches should be checked regularly with a radio time signal . 22. BBC radio stations broadcast the " six pips " of the Greenwich Time Signal . 23. The Ottawa, Ontario, Canada broadcasts an exclusive digital time signal encoded using AFSK modulation. 24. The above method is primitive real-time signal optimization at best. 25. The Russian time signal RWM transmits an additional correction dUT1 in 0.02 s increments. 26. The format of the service is similar to that of radio time signal services. 27. This procedure combines encryption algorithms already in use with time signals delivered by Galileo. 28. It provides increased accuracy thanks to its use of time signals from Galileo satellites. 29. It also operates the JJY, a low frequency time signal . 30. "We're looking for him to sustain this and not send a one-time signal ."
