On Wed 2019-11-20T11:35:51+0000 Peter Vince hath writ: > As I mentioned in a previous message about observed anomalies with the DST > change on DCF77, Pieter-Tjerk in the Netherlands noted that the time > encoded on the phase-modulated carrier of the BBC's 198KHz signal in the UK > was about 900 milliseconds early. Having queried that with a contact in > the BBC, a problem was found and corrected, but Pieter-Tjerk reports the > signal is now about 90 milliseconds late. A further query with my contact > reveals that this is to be expected.
90 milliseconds is a larger offset than was seen in the broadcasts that the BIH monitored during most of its existence as seen in these plots https://www.ucolick.org/~sla/leapsecs/BHsHn05p142.html This report indicates that the clock time blocks are intended to provide UTC https://downloads.bbc.co.uk/rd/pubs/reports/1984-19.pdf The current version ITU-R TF.460-6 says that time signals should not deviate by more than 1 ms from UTC. How can these broadcasts justify such a large offset? -- Steve Allen <s...@ucolick.org> WGS-84 (GPS) UCO/Lick Observatory--ISB 260 Natural Sciences II, Room 165 Lat +36.99855 1156 High Street Voice: +1 831 459 3046 Lng -122.06015 Santa Cruz, CA 95064 https://www.ucolick.org/~sla/ Hgt +250 m _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.