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About this collection

Since 1923, the National Bureau of Standards (now NIST) has operated radio stations that broadcast standard time and frequency signals that were used as both time and frequency standards. These signals were the basis for setting clocks and were widely used for navigation, for setting frequencies of broadcast stations, and for other uses in which accurate frequency control was important. WWV locations have included Washington, D.C. (1923-1931), College Park, Maryland (1931-1932), Greenbelt, Maryland (1932-1966), and Fort Collins, Colorado (1966 to the present).

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