Hi, gang,
I've recently become the proud owner of an Odetics/Kode 325 SatSync
clock, and am attempting to resurrect it. After a day's worth of effort, I'm
becoming suspicious of the receiver module (everything else seems to be OK).
Are there any Odetics experts on the list? More
Yeah just think of the environmental impact or the impact of the environmental
protection agency; which ever is greater. :)
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf
Of Didier Juges
Sent: Saturday, December 09, 2006 5:41 PM
To: Discussion of precise tim
I remember a brief interview with a person who coordinates G info for
the military. They have detailed maps of g effects around the world
(useful for targetting missiles, apparently) but the work is classified.
jay
John Miles wrote:
>It is surprisingly hard to get a straight answer about what
From: Didier Juges <[EMAIL PROTECTED]>
Subject: Re: [time-nuts] Time Nuts at PTTI this past week
Date: Sat, 09 Dec 2006 17:41:28 -0600
Message-ID: <[EMAIL PROTECTED]>
> Don't do that over my house :-)
I too prefer the sand. Besides, he would loose weight by the emptying of
batteries, exhailing ca
Don't do that over my house :-)
Didier
Tom Van Baak wrote:
> Yes, and instead of dropping sand to keep aloft
> over time I could drop the lead acid batteries as I
> use them up!
>
> /tvb
>
>
>
___
time-nuts mailing list
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https://w
From: [EMAIL PROTECTED]
Subject: Re: [time-nuts] Time Nuts at PTTI this past week
Date: Sat, 9 Dec 2006 20:08:04 +0100 (CET)
Message-ID: <[EMAIL PROTECTED]>
> On Sat, December 9, 2006 17:52, Magnus Danielson said:
> > Remember that while you are 1340 meters up, the mountains gravity pull
> > creat
Ah, that makes sense... g=G*M/(r^2), so a small change in radius (elevation)
matters a lot more than the small change in mass underfoot. It's back to
junior-high physics for me...
-- john, KE5FX
> > Remember that while you are 1340 meters up, the mountains gravity pull
> creates
> > a local com
> Theres no way to accurately predict g, only measurements will do if you
> want precision, but a first order aproximation can be derived from
> a topological representation and rudimentary knowledge of the geology.
PHK,
I think a first-order value comes simply from the mass
and radius of the ear
> Remember that while you are 1340 meters up, the mountains gravity pull
creates
> a local compensation to a small degree, so you will not fully experience
the
> full altitude difference.
Magnus,
Yes, I considered this but found the compensation
was several orders of magnitude below the numbers
I
> but what source(s) did you use to arrive at the
> 1.5E-13 figure?
John,
Good question. Here's how: c = 299792458 m/s and
to a few percent g is 9.806 m/s^2. The GR redshift is
gh/c^2 so that's where the 1.091e-16 / meter number
comes from.
Now the back-of-envelope redshift prediction prior to
t
In message <[EMAIL PROTECTED]>, "John Miles" writes:
>It is surprisingly hard to get a straight answer about what happens to g on
>a mountain (http://www.newton.dep.anl.gov/askasci/phy00/phy00905.htm).
Theres no way to accurately predict g, only measurements will do if you
want precision, but a f
It is surprisingly hard to get a straight answer about what happens to g on
a mountain (http://www.newton.dep.anl.gov/askasci/phy00/phy00905.htm). I
guess it's in the paper, but what source(s) did you use to arrive at the
1.5E-13 figure?
It might be interesting to take another expedition of the s
> I greatly enjoyed measuring the Rabi-Ramsey separations on my Cs beam by
> inserting my own 12.6 MHz signal which I swept with my network analyzer. I
then
> modulated the detected level through a double-balanced mixer with 12.6 MHz
> signal and tossed that in on the measurement port. Then I actua
On Sat, December 9, 2006 17:52, Magnus Danielson said:
> Remember that while you are 1340 meters up, the mountains gravity pull
> creates a local compensation to a small degree, so you will not fully
> experience the full altitude difference.
Would that mountaing gravity pulling be accounted for w
I second the request for public release off these slides! (pounds shoe on
podium)
I've got plenty of hosting space, if that would help at all.
-- john, KE5FX
> > What's the calculated value? Lassen isn't very high. Are the
> campgrounds
> > higher than Denver/Boulder?
>
> It was Mt Rainier,
From: "Bill Hawkins" <[EMAIL PROTECTED]>
Subject: Re: [time-nuts] Time Nuts at PTTI this past week
Date: Sat, 9 Dec 2006 10:11:05 -0600
Message-ID: <[EMAIL PROTECTED]>
> Ah, yes, the C field. A change in magnetic field can change
> the clock frequency. Parts in 1e-14 are exceedingly small.
If you
From: "Tom Van Baak" <[EMAIL PROTECTED]>
Subject: Re: [time-nuts] Time Nuts at PTTI this past week
Date: Sat, 9 Dec 2006 07:43:41 -0800
Message-ID: <[EMAIL PROTECTED]>
> Hal,
Tom,
> > What's the calculated value? Lassen isn't very high. Are the campgrounds
> > higher than Denver/Boulder?
>
>
Yes, the older cesiums (5061, 5040, etc.) had an analog adjustment for the
C-Field, which could push the frequency by a few parts in 10^10.
The modern cesiums (5071, 4040, 4310, etc.) automatically servo the C-Field
to the atomic spectrum with high accuracy. They can be digitally tuned via
RS2
Ah, yes, the C field. A change in magnetic field can change
the clock frequency. Parts in 1e-14 are exceedingly small.
Is it necessary to correct for the Earth's magnetic field
when the clock travels?
Bill Hawkins
Actually, that's a test that can be done at home with a
couple of 2-3 foot diamete
Mark, Check this out.
Bruce W1GBS
http://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/archv013.cgi?read=41262
- Original Message -
From: "Bruce Lanning" <[EMAIL PROTECTED]>
To: "Discussion of precise time and frequency measurement"
Sent: Saturday, December 09, 2006 10:03 AM
Subject:
Hal,
> What's the calculated value? Lassen isn't very high. Are the campgrounds
> higher than Denver/Boulder?
It was Mt Rainier, near here in Seattle, WA. We
went up to the 5400' level where the clocks ran on
the order of 500 ps/hour faster than at my home lab
at 1000'. We stayed up there about
First a little humor:
http://www.leapsecond.com/pages/atomic-tom/
There is an atomic clock experiment I've wanted to do
for years.
I assume many of you know that, according to Einstein's
special theory of relativity, clocks moving fast run slower.
Similarly, according to his general theory o
Hi Mark,
The manual is about 1 inch thick and I'm not into copying it, sorry. I would
call "Manuals Plus at 1-800-345-4019 and I would guess that they would have
the manual.
Bruce W1GBS
- Original Message -
From: "Marc Bury" <[EMAIL PROTECTED]>
To:
Sent: Saturday, December 09, 2006 6:
Hello Bruce,
I have also a working HP 59309A HP-IB Digital Clock in working condition (not
for sale), but I have been looking for a manual for some time now.
Is there any chance I could get a copy ?
Thanks,
Marc
-Original Message-
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Neat writeup. Thanks.
> The change in altitude caused a frequency shift that, when totaled for
> 3 days, amounted to a clock offset of ~22 nsec with respect to his "at
> home" clock bank
What's the calculated value? Lassen isn't very high. Are the campgrounds
higher than Denver/Boulder?
For
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