[time-nuts] Leap second - MSF time signal
David Malone
dwmalone at maths.tcd.ie
Sun Jan 1 12:02:13 UTC 2017
On Sun, Jan 01, 2017 at 02:28:23AM +0000, Deirdre O'Byrne wrote:
> https://www.youtube.com/watch?v=FpBxB2Yqh-U
Nice.
> Starting at 23:58:00 -
> A 100000000000000000001011010010110001110100011101100101111110
> B 100000000111100000000000000000000000000000000000000000001000
>
> Starting at 23:59:00 -
> A 1000000000000000000001011100001000001000000000000000001111110
> B 1111111000000000000000000000000000000000000000000000000111100
My decoder seemed to give something like this:
A: 00000000000000000001011010010110001110100011101100101111110
B: 00000000111100000000000000000000000000000000000000000001000
Raw: 31/12/2016 23:59 Sat -400 No-DST
Ctime: Sat Dec 31 23:59:01 2016
A: 00000000000000000001011100001000001000000000000000101111110
B: 11111100000000000000000000000000000000000000000000000111000
Raw: 1/1/2017 0:01 Sun 600 No-DST
Ctime: Sun Jan 1 00:01:01 2017
Which shows it switching at the right time. There's a long wave spectrum
at:
http://www.maths.tcd.ie/~dwmalone/time/leap2016/leap2017010100.png
or an animated verion at:
https://www.youtube.com/watch?v=9Y_DQZN88HQ
I think the time codes relate transmitted relates to the minute following
the one in which they are transmitted according to:
http://www.npl.co.uk/upload/pdf/MSF_Time_Date_Code.pdf
Could that explain what you saw?
David.
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