[time-nuts] DST change on DCF77

[Peter Vince]

That's fantastic - thank you so much!

      Regards,

           Peter


On Wed, 30 Oct 2019 at 22:15, Pieter-Tjerk de Boer <p.t.deboer at utwente.nl>
wrote:

> Hello Peter,
>
> While monitoring DCF77, MSF, and other longwave time signals during the
> DST change this weekend, I did not observe any irregularities.
> I don't have a recording of the raw signals, but here is the decoded data,
> including reception timestamps in the last column:
>
> BBC:                 00:58        1572137879.092676
> DCF77_PM: 2019-10-27 02:58        1572137880.001366
> DCF77_AM: 2019-10-27 02:58        1572137880.001398
> TDF:      2019-10-27 02:58 +0200  1572137880.001817
> MSF:      2019-10-27 01:58 +0100  1572137880.002950
> RBU:      2019-10-27 03:58 +0300  1572137880.006877
>
> BBC:                 00:59        1572137939.092602
> DCF77_PM: 2019-10-27 02:59        1572137940.001373
> DCF77_AM: 2019-10-27 02:59        1572137940.001407
> TDF:      2019-10-27 02:59 +0200  1572137940.001608
> MSF:      2019-10-27 01:59 +0100  1572137940.002951
> RBU:      2019-10-27 03:59 +0300  1572137940.006869
>
> BBC:                 01:00        1572137999.092559
> DCF77_PM: 2019-10-27 02:00        1572138000.001382
> DCF77_AM: 2019-10-27 02:00        1572138000.001419
> TDF:      2019-10-27 02:00 +0100  1572138000.001550
> MSF:      2019-10-27 01:00 +0000  1572138000.002903
> RBU:      2019-10-27 04:00 +0300  1572138000.006862
>
> BBC:                 01:01        1572138059.092783
> DCF77_PM: 2019-10-27 02:01        1572138060.001379
> DCF77_AM: 2019-10-27 02:01        1572138060.001415
> TDF:      2019-10-27 02:01 +0100  1572138060.001530
> MSF:      2019-10-27 01:01 +0000  1572138060.002906
> RBU:      2019-10-27 04:01 +0300  1572138060.006861
>
>
> BBC is the phase modulation on their 198 kHz AM transmitter, encoding UTC.
> DCF77_PM and _AM are the phase and amplitude modulation of DCF77 on 77.5
> kHz.
> TDF is the French 162 kHz signal.
> MSF is 60 kHz from the UK.
> RBU is 66⅔ kHz from Russia, where no DST change was made this weekend.
>
> The last column is the reception time as a Unix timestamp, w.r.t. a
> LORAN-synchronized clock.
> Clearly, the BBC signal is about 0.9 s early; the others are slightly late
> due to propagation time from their transmitters to my receiver location
> (Enschede. The Netherlands).
>
> Regards,
>   PieterTjerk, PA3FWM
>
>
> On Mon, Oct 28, 2019 at 06:26:05PM +0000, Peter Vince wrote:
> > Was anyone here monitoring DCF77 during the summer-time change this
> > weekend?  An acquaintance has recently modified his code that receives
> MSF,
> > and noticed an anomaly - his log shows the minute 02:59 CEST was missing.
> > It seems tremendously unlikely that there was any kind of fault with DCF,
> > but sadly he doesn't have a recording of the actual RF signal, just his
> > decoder output.  So I was just wondering if anyone else noticed anything
> > untoward, or maybe even, does anyone have a recording of the signal
> itself?
> >
> >      Thank you,
> >
> >           Peter
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