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Physical Measurement Laboratory / Time and Frequency Division

Time Realization and Distribution

WWVB Antenna Configuration and Power

During normal operation WWVB transmits an effective radiated power of 70 kW from two antennas. For maintenance purposes WWVB sometimes operates on a single antenna or reduced power. The table below reflects this information.

* indicates that an outage or outages occurred during this period, see the WWVB Broadcast Outage web page.

2020 Outages | 2019 Outages | 2018 Outages | 2017 Outages

Date	MJD	Began (UTC)	Ended (UTC)	Antenna Configuration	Radiated Power (kW)
07 September 2021	59464		1320	South	30
06 September 2021	59463	0340
19 July 2021	59414	1559	1634	North	30
15 July 2021	59410	1603	1951	South	30
15 July 2021	59410	1537	1603	North	30
14 July 2021	59409	1255	1726	South	30
13 July 2021	59408	1338	1453	North	30
12 July 2021	59407	1417	2259	North	30
02 June 2021	59367	0448	1301	South	30
10 April 2021	59314	2241	2334	South	30
31 March 2021	59304	1555	2228	South	30
31 March 2021	59304	1428	1520	North	30
29 March 2021	59302	1947	2210	North	30
26 March 2021	59299	1624	2123	North	30
25 March 2021	59298	1547	1554	South	30
25 March 2021	59298	1535	1547	North	30
25 March 2021	59298	0812	1500	North	30
23 March 2021	59296	1401	2240	North	30
23 March 2021	59296		0050	South	30
22 March 2021	59295	1432
22 March 2021	59295		1432	North	30
18 March 2021	59291	1342
17 March 2021	59290	2004	2128	North	30
12 March 2021	59285	2030	2347	North	30
12 March 2021	59285	1542	2029	South	30
11 March 2021	59284	1742	2325	South	30
09 March 2021	59282	1807	2139*	South	30
11 February 2021	59256	1410	1835	North	30

Time and frequency

Created December 5, 2016, Updated September 9, 2021