Re: [time-nuts] Frequency deviations in Europe affect clocks

> On Mar 8, 2018, at 6:39 AM, Jean-Louis Rault wrote: > > A picture of my own microwaves oven, this 8th of march, near Paris, France .

Re: [time-nuts] Atomic Watch

>>> On Mon, Oct 17, 2016 at 9:45 PM, Jim Palfreyman >>> wrote: >>> Well I think there's a mistake or two here... https://www.inverse.com/article/20497-john-patterson-atomic-ce But, MARS! -Bill signature.asc Description:

[time-nuts] Fwd: "NUT4ANT is a four-channel, all-frequency, GNSS RF-to-bits receiver"

Perhaps of interest, forwarded from CrowdSupply. -Bill > Begin forwarded message: > > From: Crowd Supply > Subject: A satellite-guided floating Panopticon bristling with the talons of > freedom > Date: September 22, 2016 at 2:56:38 PM

[time-nuts] Fwd from NANOG: Erroneous Leap Second Introduced at 2014-06-30 23:59:59 UTC

Begin forwarded message: From: Tim Heckman t...@heckman.io Date: June 30, 2014 at 17:33:52 PDT To: na...@nanog.org Subject: Erroneous Leap Second Introduced at 2014-06-30 23:59:59 UTC Hey Everyone, I just was alerted to one of the systems I managed having a time skew greater than

Re: [time-nuts] Boeing 787 GPS reception trouble

I've flown on 787s three times before, and am about to do so again later today. The prior times I used my cell phone as normal and didn't give it any thought. This time I'll pay particular attention and report back. Twice for me have been Ethiopian Air, once London-Addis, once Dulles-Addis.

Re: [time-nuts] Boeing 787 GPS reception trouble

I'm posting this from inside an Ethiopian 787, on the ground, with the doors closed. I just completed a fifteen-minute voice call initiated from inside the plane, with reasonable reception and no drops, while the doors were open. And I was able to get a new GPS location in less than two

Re: [time-nuts] Looking for Dual-Time Atomic Clock

All the ones we use are from BRG Precision Products: http://www.brgprecision.com/products/time_zone_displays/index.php Here’s what it looks like on the wall: https://www.pch.net/dnssec/zrh -Bill signature.asc Description: Message signed with OpenPGP using

[time-nuts] Story in the Economist about GPS jamming

http://www.economist.com/news/international/21582288-satellite-positioning-data-are-vitalbut-signal-surprisingly-easy-disrupt-out?fsrc=scn/tw/te/pe/outofsight -Bill ___ time-nuts mailing list -- time-nuts@febo.com

Re: [time-nuts] NTP Clock suggestions?

On May 27, 2013, at 8:21 AM, Eric Williams wd6...@gmail.com wrote: I'm happy with my OnTime dial clock. I have been very happy with the ones I've gotten as well. That said, I have one that my wife managed to snag the Ethernet cord on, ripping the Ethernet jack off the motherboard. It's free

Re: [time-nuts] Low-long-term-drift clock for board levelintegration?

-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 On Feb 21, 2012, at 11:12 AM, Mark Spencer wrote: Perhaps another way to approach this problem would be to see if there are entities and or individuals who already have precision time keeping equipment (or at least access to GPS antennas) who

Re: [time-nuts] Low-long-term-drift clock for board levelintegration?

-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 What if one sends a message one way that triggers say, 10 response messages 1 second apart. Then you get distribution statistics on the return path. You still don't know what the absolute forward or reverse path time was, of course. Yes,

Re: [time-nuts] Low-long-term-drift clock for board levelintegration?

-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 On Feb 21, 2012, at 10:05 AM, Chris Albertson wrote: BTW, Is the O.P. still here? I wonder if he is re-thinking his requirements. The requirement is to do one-way delay measurements. The requirement isn't changing. I'm just here to educate

Re: [time-nuts] Low-long-term-drift clock for board level integration?

-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 On Feb 20, 2012, at 8:34 AM, Achim Vollhardt wrote: what about White Rabbit? It delivers Gigabit Ethernet and precise (1nsec) timing over singlemode fiber. Ahah, but if I had singlemode fiber between locations all over the world, I wouldn't

Re: [time-nuts] Low-long-term-drift clock for board level integration?

-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 On Feb 20, 2012, at 11:07 AM, Jim Lux wrote: One question about the 100 microsecond spec.. is that a worst case at any instant, or is it an average spec over a day (so a consistent diurnal variation would cancel out) Well, it's not a hard

[time-nuts] Low-long-term-drift clock for board level integration?

-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Hi. This is my first posting to this list, and I'm not a timekeeping engineer, so my apologies in advance for my ignorance in this area. I'm building a small device to do one-way delay measurements through network. Once I'm done with

Re: [time-nuts] Low-long-term-drift clock for board level integration?

-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 On Feb 19, 2012, at 5:07 PM, Bill Hawkins wrote: If you are going to correct it with NTP, a simple crystal oscillator will do. Yeah, my assumption was that something like a DOCXO or a VCTCXO would be about the best I'd get within budget. But

Re: [time-nuts] Low-long-term-drift clock for board level integration?

-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 On Feb 19, 2012, at 7:28 PM, Dennis Ferguson wrote: 10, or even 100, microseconds is tough with NTP. I don't think it is impossible, but it requires a good, reliable network connection… We will have a very large mesh of devices, but the

Re: [time-nuts] Low-long-term-drift clock for board level integration?

-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 On Feb 19, 2012, at 9:02 PM, saidj...@aol.com wrote: this is potentially possible with the small M9108 or the Jackson Labs Technologies GPSTCXO. Thanks for the pointer to both of them… It looks like Jackson Labs have several interesting

Re: [time-nuts] Low-long-term-drift clock for board level integration?

-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 On Feb 19, 2012, at 10:20 PM, Dennis Ferguson wrote: I think you may find that in many (most?) other countries the GSM BTS gear has no idea what time it is. Pretty wide range there… I've certainly seen some pretty crazy time-and-dates show up