FYI,
I tuned into WWV this evening (August 19, 2012 UTC), and was surprised to hear
the station making some incorrect audio time announcements.
Specifically,
23:20 UTC was announced as 23:28 with no audio tone
23:23 UTC was announced as 23:29 with an audio tone
23:25 UTC was announced as 23:29 with an audio tone
23:26 UTC was announced as 23:29 with an audio tone
23:27 UTC was announced as 23:29 with an audio tone
23:28 UTC was announced as 23:28 with an audio tone
23:29 UTC was announced as 23:29 but was followed by station ID
23:30 UTC was announced as 23:30 with an audio tone (no ID)
23:32 UTC was announced as 23:35 with an audio tone
23:44 UTC was announced as 23:49 with no audio tone
23:57 UTC was announced as 23:59 with no audio tone
23:58 UTC was announced as 23:59 with no audio tone
I did not take notice as to whether the audio tones being transmitted were the
correct ones for the particular minute, but some of the silent periods and the
timing of the station ID appeared to be out of character.
I notified NIST of these unusual observations.
73, de John, KD2BD