In message <[EMAIL PROTECTED]>, Steve Allen writes:
>On Mon 2007-01-15T08:53:19 -0700, Rob Seaman hath writ:
>> Any comments on the practicality of space-rating such timepieces?
>
>GPS uses rubidium cells, and Galileo will.
Galileo will use Rb and Hydrogen, provided the Hydrogen survices
the testp
In message <[EMAIL PROTECTED]>, Rob Seaman writes:
>Before somebody else calls me on it, I should point out that NTP
>actually uses both:
>
>"The clock discipline algorithm functions as a nonlinear, hybrid
>phase/frequency-lock (NHPFL) feedback loop."
>
>(see http://www.cis.udel.edu/~mills
On Mon 2007-01-15T08:53:19 -0700, Rob Seaman hath writ:
> Any comments on the practicality of space-rating such timepieces?
GPS uses rubidium cells, and Galileo will.
I've seen ruminations about flying a cesium resonator and an ion trap
on ISS with a goal of redefining the SI second by allowing a
On Mon, 15 Jan 2007, Rob Seaman wrote:
>
> I'm wondering whether the clock discipline might better emphasize
> only frequency in such circumstances, as opposed to merely tempering
> the PLL.
I think that if you only correct the frequency of a clock then each time
the frequency makes a deviation (e
Rob Seaman wrote:
> I suspect we're all bemused to
>contemplate issue terrestrial leap seconds on Martian bases.
It seems about as silly as Antarctic bases observing daylight saving
time. Which several do. The Amundsen-Scott base at the south pole
maintains New Zealan
I said:
I also wonder whether it might be productive to consider closing
the NTP "servo loop" in velocity (frequency) in this case, rather
than position (phase).
Before somebody else calls me on it, I should point out that NTP
actually uses both:
"The clock discipline algorithm functio
On Fri 2007-01-12T18:35:55 +, Tony Finch hath writ:
According to the slides linked from Dave Mills's "Timekeeping in
the Interplanetary Internet" page, they are planning to sync Mars
time to UTC. http://www.eecis.udel.edu/~mills/ipin.html
There seems to be an unwarranted assumption that a
On Mon, 15 Jan 2007, Tony Finch wrote:
> On Mon, 15 Jan 2007, Peter Bunclark wrote:
> >
> > > http://www.eecis.udel.edu/~mills/ipin.html
> >
> > That page does not seem to mention UTC...
>
> Look at the slides.
Whoops. In my defense, there has been traffic elsewhere pointing out that
authoring in
On Mon, 15 Jan 2007, Peter Bunclark wrote:
>
> > http://www.eecis.udel.edu/~mills/ipin.html
>
> That page does not seem to mention UTC...
Look at the slides.
Tony.
--
f.a.n.finch <[EMAIL PROTECTED]> http://dotat.at/
BISCAY FITZROY: VARIABLE 4, BECOMING SOUTHWESTERLY 5 TO 7 IN NORTHWEST
FITZROY.
On Fri, 12 Jan 2007, Tony Finch wrote:
> According to the slides linked from Dave Mills's "Timekeeping in the
> Interplanetary Internet" page, they are planning to sync Mars time to UTC.
> http://www.eecis.udel.edu/~mills/ipin.html
>
That page does not seem to mention UTC... it does mention runnin
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