Today in History:
Royal Greenwich Observatory Begins Broadcasting Hourly Time Signals (1924)
The Greenwich Time Signal (GTS), popularly known as the pips, is a series of six short tones broadcast at one-second intervals by many BBC Radio stations to mark the precise start of each hour. First introduced in 1924, the viability of continued use of the time signal on radio is under discussion[citation needed], as the unavoidable time lags associated with digital broadcasting systems make its use less feasible as an aid to calibration.
Source: encyclopedia.thefreedictionary.com
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Hadrian
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