[LEAPSECS] Caveat emptor!

[Poul-Henning Kamp]

In message <201104121113.aa50161 at walton.maths.tcd.ie>, David Malone writes:

>> The Radio 4 time signal pips used to be produced by the RGO time service,

>> so they were also a means of broadcasting official legal time. The Radio 4

>> long-wave transmitter also was and remains a frequency standard. However

>> since the RGO's time service was terminated the BBC have generated the

>> pips themselves from GPS.

>

>There is also a phase modulated code on top of the BBC Radio 4 long

>wave transmission that includes the UTC time, up to the minute.

>

>	http://downloads.bbc.co.uk/rd/pubs/reports/1984-19.pdf

>

>Though I guess this is provided by the BBC rather than the NPL. The

>French have something similar on top of TDF.


See:
	http://phk.freebsd.dk/loran-c/CW/

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
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