WWV (time signal transmitter)

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WWV
Image of the object
Transmitter building in Fort Collins
Basic data
Place: Fort Collins
State: Colorado
Country: United States
Coordinates: 40 ° 40 ′ 47 "  N , 105 ° 2 ′ 33"  W.
Use: Time signal transmitter
Accessibility: Transmission system not accessible to the public
Data on the transmission system
Wavebands : SW transmitter , LW transmitter
Position map
WWV (Colorado)
WWV
WWV
Localization of Colorado in USA 48

WWV is the callsign of an American shortwave transmitter to broadcast the official US time UTC by means of time signals . The transmitter works on five round frequencies in continuous operation.

Content of broadcasts

Broadcast signal. The minute signal at the beginning and the 30-second mark at which no click is broadcast can be clearly heard.

The American authority National Institute of Standards and Technology (NIST) broadcasts time signals on the shortwave frequencies 2.5, 5, 10, 15 and 20 MHz with the WWV transmitter from Fort Collins in the US state of Colorado .

The IRIG timecode in the IRIG H format is used for broadcasting. The signal can also be heard on the telephone announcement + 1-303-499-7111. In addition, weather warnings for shipping , the status of the GPS and geophysical warnings about radio propagation are broadcast every hour at defined times .

The advantage of shortwaves (which also use Russian and Chinese time signal transmitters) is the good reflection on ionospheric layers , which gives the time signal a large, albeit somewhat variable, range.

Long wave transmitter WWVB

At the same location, a long-wave transmitter under the callsign WWVB is operated on the frequency 60 kHz .

WWVH shortwave transmitter in Hawaii

For the Pacific , NIST also operates a shortwave transmitter with the callsign WWVH in Kekaha on the island of Kaua'i in Hawaii . The transmission frequencies are 2.5 MHz, 5 MHz, 10 MHz and 15 MHz. WWVH uses a female voice to distinguish the transmission of WWV on the same frequencies. This signal can also be heard on the telephone announcement + 1-808-335-4363.

See also

Web links

Commons : WWV  - collection of pictures, videos and audio files