Le 10/08/2011 07:41, Attila Kinali a écrit :
On Fri, 15 Jul 2011 05:57:45 +
Poul-Henning Kampp...@phk.freebsd.dk wrote:
Everybody but the time-lords have always been told to stay away from
TAI in the strongest possible terms by said time-lords, who again and
told the world to use UTC.
Le 10/08/2011 12:55, Attila Kinali a écrit :
If TAI is a paper clock, what else should be used if a strictly monotone
time scale is needed?
Do you have any specific application in mind?
If you need an SI seconds rated scale, then you need something based on
TAI. GPS time has a TAI second rate
Le 06/08/2011 04:32, WB6BNQ a écrit :
Michael Sokolov,
I do not mean to be disrespectful, but this list is not about creating time
scales
No, indeed, but as the subject is time I see no reason that he should
not advertise the project here.
I am going to ask that you respect this position and
Le 03/08/2011 17:32, Francis Grosz a écrit :
Hi, Scott,
Here in New Orleans a friend in the power company who was interested in
its history told me a story. In the very early days, frequency control was
pretty poor and it was hard to keep up with the changing load. So by 5 PM every
Le 02/08/2011 04:35, Michael Sokolov a écrit :
snip
Henry Hallamhe...@pericynthion.org wrote:
The parameters you'll want for conversion between MCAT and mean solar
time are given daily in the IERS bulletins:
http://hpiers.obspm.fr/eop-pc/products/bulletins/bulletins.html
Yes, I know.
By
Le 03/08/2011 00:49, Chris Stake a écrit :
I don't get it.
Does that mean that leap days are OK but leap seconds are unacceptable?
Chris
For the moment yes, as they are animals from two different species. Leap
seconds form part of the current definition of UTC which is a time
scale, even
Le 23/07/2011 01:39, Horst Schmidt a écrit :
Ha, you may well ask. The reason to hate DST is given to us in the
southern parts of Australia, by our Queensland cousins:
The problems with DST is :
1. The Cows get very confused and the farmers have problems milking them.
2. The chickens
Le 15/07/2011 07:57, Poul-Henning Kamp a écrit :
snip
Everybody but the time-lords have always been told to stay away from
TAI in the strongest possible terms by said time-lords, who again and
told the world to use UTC.
The time lords are not completely deaf. For more than 10 years there has
Le 15/07/2011 10:33, Poul-Henning Kamp a écrit :
In message4e1ffa88.9050...@sfr.fr, cook michael writes:
Michael, there are a few details you overlook, and rather than
repeat myself, I'll point you at an article I wrote for Queue and
Communications of The ACM, trying to lay out the bits:
http
Le 07/06/2011 21:15, r...@lcs.mit.edu a écrit :
I have an HP 58503A. It has an Option H14,H19 sticker on the back. The
circuit board has 58503-60001 Rev C stamped on it. It has been running
continuously and locked to GPS for a few days, and it knows the correct
number of seconds between GPS and
Le 25/05/2011 04:00, Tom Holmes a écrit :
snip
Steven Cherry is exaggerating when he says most systems go down for
planned maintenance instead of trying to deal with leap seconds in real
time.
As someone who has been supporting major industrial, banking, airline
systems for the last 30
Le 21/05/2011 08:30, Robert Darlington a écrit :
Guys, I gotta ask, what does this have to do with time keeping? Am I
missing something?
-Bob
I know what you mean. I was desperately fighting down the urge to reply
to Lamar's post to query the significance of cows and horses.
On Fri, May
Le 16/05/2011 00:29, iov...@inwind.it a écrit :
You are right, the right value for the crystal would be about 32859.27, but I
thought that such a difference could be compensated in the circuitry, that's
why I omitted the decimals.
before you get into grinding I have a question on your chosen
Le 15/05/2011 23:22, iov...@inwind.it a écrit :
Hi all,
does anybody out there have any ideas as where to find a 32859Hz crystal (1/2
that value would be better) to be used to replace 32768 crystals in ordinary
clocks?
I don't think this will work as the divider chain will give wrong length
Le 25/04/2011 18:35, Iain Young a écrit :
Hi Guys,
Having finally got the time to get my Z3816A connected up to both a
power supply and antenna, I find myself with a minor issue.
It powers up just fine (minus the silly Antenna alarm, really must
add that resistor sometime...) gets GPS Lock,
Le 24/04/2011 20:04, Pete Lancashire a écrit :
Mitac MGE100
Yes; looks like a dev kit. I find it's a
12-Channel GPS Receiver Module Based on SiRF Technology Chipset.
What version of SIRF I cant see. Google for SIRF NMEA Reference manual ,
hook it to a Serial port and away you go.
There are
Le 20/04/2011 16:17, John Ackermann N8UR a écrit :
I wonder if it's smart enough to have a sanity check to determine
whether the line frequency is 50 vs. 60 Hz?
BTW -- I have an Ecodrive watch, but it's radio controlled (as well as
solar charging), so haven't seen any reference to this
Le 17/04/2011 00:20, beale a écrit :
The application note merely asserts the possibility, but neglects to present a
specific design. Has anyone here attempted to use a PIC CTMU in that way?
The app note doesn't give a complete design, but the principle of
precision time measurement is
Le 07/04/2011 16:20, Jerry a écrit : The 10 MHz
output is not close to the expected frequency tolerance. The first of
the units that I received puts out a signal at 9,999,945 Hz. The
vendor then sent a second unit which puts out a signal at 10,000,025
Hz.
Could it be the transport conditions
Le 05/04/2011 17:51, Jim Lux a écrit :
On 4/5/11 8:25 AM, Brooke Clarke wrote:
Hi:
Just reading at:
http://futureboy.us/frinkdata/units.txt
First about the candela and all it's problems, then what's a Time Nut
issue Hz .
// This means that, if you follow the rules of the SI,
// 1 Hz =
Le 20/03/2011 05:59, Bruce Griffiths a écrit :
jimlux wrote:
A 10-12m diameter dish is probably close to the minimum feasible
aperture.
A 4m dish can be made to work in conjunction with a mauch larger dish
(eg 30m).
The original speculation was for measuring the small change in earth
Le 17/03/2011 22:14, Jim Palfreyman a écrit :
Just for fun I plotted the UT1-UTC data from the IERS Bulletin A.
Here's the raw data:
I add the deltas
UT1-UTC
s delta
-0.18115
-0.182320,00161
-0.183530,00121
-0.1847 0,00117
-0.185760,00116
-0.186740,00098
-0.18763
Le 20/03/2011 11:02, cook michael a écrit :
Le 17/03/2011 22:14, Jim Palfreyman a écrit :
Just for fun I plotted the UT1-UTC data from the IERS Bulletin A.
Here's the raw data:
Ooops - I correct the deltas ...
UT1-UTC
s delta
-0.18115
-0.182320,00117
-0.183530,00121
Le 13/03/2011 10:28, Charles P. Steinmetz a écrit :
Mahlon wrote:
The Lightsquared terrestrial network will be LTE, same as most
carriers are migrating to. They will almost certainly use GPS timing
receivers at the cell sites for network timing.
and their timing receivers antenna will
Le 11/03/2011 01:24, J. Forster a écrit :
One Watt per square meter:
http://www.ecd.bnl.gov/steve/watt.html
===
The ‘scandal’ of the kilogram
First, it’s vital for us as consumers to be confident about what we buy –
we don’t want to be ripped off at the checkout with an underweight
The problem will probably resolve itself when the first idiot to lose
his GPS at a T junction drives into the deli across the street as he/she
was not told to take a turn. The driver will sue for denial of service
and 50 million other Americans will jump on board the class action.
Le
Le 28/02/2011 17:37, David VanHorn a écrit :
I have a thunderbolt up and running since last week Friday.
I'm doing this for a calibration source at work, eventually we will have two
antennas, feedlines, and thunderbolts, so that we can have one fail and keep
operating, but for the moment I
Le 22/02/2011 05:13, Hirokazu Makishima a écrit :
Hi,
I got my hands on a Z3815A(with hockey puck)
and trying to communicate with it.
It seems that Z38XX and gpscon work ok at first,
then looses connection in about 30min.(error receiver timeout)
If I reestablish connection, it works fine, but
Le 16/02/2011 00:57, Chris Albertson a écrit :
How can watches be OT on a time-nuts list? Yes the technology of
today is electronic but mechanical time keeping was the center of this
art for centuries.
I agree , with the caveat that posts keep to technical topics. There
are plenty of product
: cook michael michael.c...@sfr.fr
To: time-nuts@febo.com
Sent: Wednesday, February 16, 2011 1:03 AM
Subject: Re: [time-nuts] Tool Needed to Access my Timer Battery
Le 16/02/2011 00:57, Chris Albertson a écrit :
How can watches be OT on a time-nuts list? Yes the technology of
today is electronic
I had a quick look at the IEEE-1355 HIC bus on which spacewire is based
and it seems that although the clock is not on the wire, it can be
reconstructed as an XOR of the strobe and data. So a passthrough
connector sampling those lines (differential) with RS-644 receivers and
a quad NAND may
Not that the decks are cleared for this project yet. Heck, my picII's
aren't built or programmed.
Speaking of PICTIC II's. Great project, but I had originally decided not
to go that route as list members were indicating that 5370Bs were to be
picked up for 200 bucks. Not so in France I am
Le 21/01/2011 02:23, Stanley Reynolds a écrit :
Looks like a upside down wedding cake a very familiar shape for pilots, ground
receivers may not be effected if beyond the horizon of the testing device if
it is at sea level. Yes this is just a guess on my part.
One would assume that the DoD would
Le 18/01/2011 05:07, J. L. Trantham a écrit :
An unrelated question. My Z3816A reports GPS time. I have looked but have
not found a command to make it switch to UTC. Does such a command exist?
If so, what is it?
The command to do the same on the Z3801A might work with this box aswell.
Le 18/01/2011 20:59, Poul-Henning Kamp a écrit :
In message4d35ef76.7020...@pacific.net, Brooke Clarke writes:
The research that was announced some years ago was Cs atoms:
http://physicsworld.com/cws/article/news/20177
There is a technology pdf available on their site. It gives more
Hi,
A couple of things not mentioned in the previous responses:
precision here is not how accurate your laptops clock is.
precision is a measure of how much the time changes during successive
reading of the system clock as viewed by ntpd. Its minimum value is 1us
due to the timeval
The SureElectronics unit is general within 10 feet with no observed
off the wall excursions.
With that in mind, I wonder how accurate is their 1pps output?
Hi,
There was some discussion on the MG1613S earlier. I ordered one off
the bay and did a few test.
I tried to post some pics of
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