Since 1923, NIST’s WWV station has been a reliable source for time and frequency signals, crucial for many applications. Its counterpart, WWVB, started operations in 1963, ensuring that millions of consumer devices maintain accurate time synchronization. While WWV features voice announcements and tones over shortwave frequencies, WWVB transmits inaudible signals designed for automated receivers throughout North America. These stations play an essential role in the dissemination of official U.S.
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