MSF radio time glitches
in [UK Linux]
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From: Martin Gregorie on 1 Jan 2008 11:07 I use the Rugby MSF time signal as a stratum 2 source for my house server's NTP time service, along with European and Oceania NTP server pools. My receiver is home built to Jonathon Buzzard's design. I'm using his daemon to read the clock and pass the reading to ntpd using shared memory. Just recently I had ntpd shut down twice as the result of a "sanity check" when the MSF receiver suggested a huge time change. Here are the times and time changes: Dec 28 15:45:22 zoogz ntpd[2099]: time correction of 12647 seconds Dec 31 07:13:22 zoogz ntpd[12366]: time correction of 5006 seconds This hasn't happened before though I've been running the receiver for 4 or 5 years. If anybody else is using the Rugby MSF signal and also saw these jumps I'd like to know about it. I'm trying to decide if this was a general thing or if it was just my receiver that got spiked by local interference or glitched. This will help me decide whether its worth modifying the MSF daemon to discard erroneous time signals, if the receiver needs inspection or if its just placed where it gets a poor signal. -- martin@ | Martin Gregorie gregorie. | Essex, UK org |
From: Dave Liquorice on 1 Jan 2008 13:03 On Tue, 01 Jan 2008 16:07:25 +0000, Martin Gregorie wrote: > I use the Rugby MSF time signal > > Essex, UK You do know that MSF moved from Rugby to Anthorn a few months back? It might be worth checking that your receiver is still getting a good signal and is orientated correctly, though Anthorn Rugby and Essex are pretty much on the same line. -- Cheers new5pam(a)howhill.com Dave. pam is missing e-mail
From: Tony Mountifield on 1 Jan 2008 17:25 In article <nyyfbegfubjuvyypbz.jtzmp00.pminews(a)srv1.howhill.net>, Dave Liquorice <new5pam(a)howhill.com> wrote: > On Tue, 01 Jan 2008 16:07:25 +0000, Martin Gregorie wrote: > > > I use the Rugby MSF time signal > > > > Essex, UK > > You do know that MSF moved from Rugby to Anthorn a few months back? It > might be worth checking that your receiver is still getting a good signal > and is orientated correctly, though Anthorn Rugby and Essex are pretty > much on the same line. Is that the big aerial farm in Cumbria that can be seen across the water from the south Scottish coast between Gretna and Dumfries? Cheers Tony -- Tony Mountifield Work: tony(a)softins.co.uk - http://www.softins.co.uk Play: tony(a)mountifield.org - http://tony.mountifield.org
From: Jonathan Buzzard on 1 Jan 2008 18:27 On Tue, 01 Jan 2008 22:25:50 +0000, Tony Mountifield wrote: > In article <nyyfbegfubjuvyypbz.jtzmp00.pminews(a)srv1.howhill.net>, > Dave Liquorice <new5pam(a)howhill.com> wrote: >> On Tue, 01 Jan 2008 16:07:25 +0000, Martin Gregorie wrote: >> >> > I use the Rugby MSF time signal >> > >> > Essex, UK >> >> You do know that MSF moved from Rugby to Anthorn a few months back? It >> might be worth checking that your receiver is still getting a good signal >> and is orientated correctly, though Anthorn Rugby and Essex are pretty >> much on the same line. Really? I would have thought that there was a sufficiently appreciable difference for optimal antenna orientation. My reception improved even through the antenna has not been realigned, and there is a significant change in direction for optimal orientation. That said the transmitter is now over a hundred miles nearer :-) > Is that the big aerial farm in Cumbria that can be seen across the water > from the south Scottish coast between Gretna and Dumfries? > I believe so. JAB. -- Jonathan A. Buzzard Email: jonathan (at) buzzard.me.uk Northumberland, United Kingdom. Tel: +44 1661-832195
From: Andy Burns on 1 Jan 2008 19:46
On 01/01/2008 22:25, Tony Mountifield wrote: > Is that the big aerial farm in Cumbria that can be seen across the water > from the south Scottish coast between Gretna and Dumfries? Yes, ex-HMS Nuthatch. |