National Institute of Science & Technology Radio Stations
WWV
Service began in 1923 Transmitter Photo
Frequencies, Radiated Power and Locations
-
2.5 MHz, 2.5 kW, Fort Collins, Colorado, Latitude: 40 40' 49.0" N, Longitude: 105 02' 27.0"
W
-
5.0 MHz, 10.0 kW
-
10.0 MHz, 10.0 kW
-
15.0 MHz, 10.0 kW
-
20.0 MHz, 2.5 kW
Broadcast Format Figure
Frequency Accuracy
As transmitted: 1 part in 100 billion
As received: 1 part in 10 million
Time Accuracy
As received: 1 millisecond plus propagation delay
WWVH
Service began in 1948 Transmitter Photo
Frequencies, Radiated Power and Locations
-
2.5 MHz, 5.0 kW, Kauai, Hawaii, Latitude: 21 59' 26.0" N, Longitude: 159 46' 00.0 W
-
5.0 MHz, 10.0 kW
-
10.0 MHz, 10.0 kW
-
15.0 MHz, 10.0 kW
Broadcast Format Figure (pending)
WWVB
Service began in 1956 Transmitting Antenna Photo
Frequency Accuracy
As transmitted: 1 part in 100 billion
As received: 1 part in 100 billion
Frequencies, Radiated Power and Location
60 kHz, 23 kW, Fort Collins, Colorado, Latitude: 40 deg 40' 28.3" N, Longitude: 105 deg 02' 39.5"
W.
Note: Power increased to 23 kW on 19 Dec 1997. Increase to 40-50 kW pending in the spring of 1998. For
status see NIST Radio Station WWVB.
Broadcast Format Figure (pending)
Publications
Clocks
UBR, Inc. Data from NIST SP 432 (Revised 1990). Revised 4 Dec 1998.
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