El 30/03/2012 05:02, Jim Lux escribió:
and orientation. Sort of like a super star tracker all in one! (You
can see why NASA is interested..)
And ESA. Last year they published an invitation to tender called Deep
Space Navigation with Pulsars, with the following description excerpt:
The
act...@hotmail.com said:
Forth: The problems I foresee are can an practical algorithm accounting for
the complex motion of all these bodies be built ...
Radio astronomers are pretty good at that sort of calculation. Google for
VLBI.
The key step for VLBI is modeling the exact location of
http://inagist.com/all/185697069783195648/
Personally I'm sorry about such an end of the story.
Antonio I8IOV
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On Fri, Mar 30, 2012 at 3:07 PM, iov...@inwind.it iov...@inwind.it wrote:
http://inagist.com/all/185697069783195648/
Personally I'm sorry about such an end of the story.
There was a meeting in Gran Sasso on Wednesday. You can see some of
the slides at
El 30/03/2012 16:55, Javier Serrano escribió:
On Fri, Mar 30, 2012 at 3:07 PM, iov...@inwind.itiov...@inwind.it wrote:
http://inagist.com/all/185697069783195648/
Personally I'm sorry about such an end of the story.
There was a meeting in Gran Sasso on Wednesday. You can see some of
the
My internet provider here in the UK is BT, and BT use Yahoo. I do need to
check the BT-Yahoo account on my web browser periodically as their spam
filtering is a bit aggressive and a few genuine emails (usually from Time
Nuts) get put in the Spam bin. Other than that I have few problems.
Rob
I've evaluated various of their products including the 125 NCOs boards, and
they are worse than 2ns in real world environments.. The m12+ timing
replacement unit also only supports a small subset of the Motorola command set.
It was useless as a replacement receiver for our Fury GPSDO when we
Hello Ed, Azelio,
We should also compare the same parameters. Sawtooth error of the m12+ of
+/-25ns is not its standard deviation, it's max/min. Compare that number to
your 30ns max/min measurement on the 5372a.
Standard deviation of the m12+ is around 2ns with correction. That needs to be
I have to say that in general I have been staying clear of this thread.
But its really a surprise that they are that sloppy and basing the results
on a Vectron OCXO. Not that I have ever had a complaint about those.
It just seems like the stunt I would do in the basement on my surplus
accelerator.
Hi Said,
On 3/30/2012 10:53 AM, Said Jackson wrote:
Hello Ed, Azelio,
We should also compare the same parameters. Sawtooth error of the m12+ of
+/-25ns is not its standard deviation, it's max/min. Compare that number to
your 30ns max/min measurement on the 5372a.
Yes, you're right. Thanks
There are failures and there are failures.
A negative result is a failure that is worth reporting.
A failure due to an improperly mated connector... not so much.
When doing a complex experiment, you have to be an absolute SOB about
everything. You cannot inspect in quality.
YMMV,
-John
Hi Ed,
no problem. It's an issue when some companies claim 2ns, when it's really
5ns. Or show phase noise plots that seem to be measurements of just the
oscillator removed from the board and measured in a clean-room environment,
not measurements of the module with all the digital control
Actually I don't have a good reference (Z3815A): I'm still preparing my
first disciplined Rb and have 2 Fluke PM6681s. I'm waiting for my SR620, it
should be on its way to Italy right now. I have 2 TBolts but not yet turned
on. What kind of reference have you used?
On Fri, Mar 30, 2012 at 8:10
On Fri, Mar 30, 2012 at 7:42 PM, J. Forster j...@quikus.com wrote:
There are failures and there are failures.
A negative result is a failure that is worth reporting.
A failure due to an improperly mated connector... not so much.
That is saying to anyone who wants to do a similar experiment in
Has anyone compared the M12M to the M12+?
Thanks for all the input, it is really appreciated.
best wishes;
Thomas Knox
CC: time-nuts@febo.com
From: saidj...@aol.com
Date: Fri, 30 Mar 2012 09:53:17 -0700
To: time-nuts@febo.com
Subject: Re: [time-nuts] CW12-TIM vs M12M and the world
On Fri, Mar 30, 2012 at 7:42 PM, J. Forster j...@quikus.com wrote:
There are failures and there are failures.
A negative result is a failure that is worth reporting.
A failure due to an improperly mated connector... not so much.
That is saying to anyone who wants to do a similar experiment
May anybody out there explain why the connector was simply photographed, and
not put in place, on October 13, that is one month before the updated version
(Nov 17) of the Opera paper?
Antonio I8IOV
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I suppose that when it was photographed, nobody noticed it. After
noticed that it was no correctly plugged-in, the past pictures were
reviewed and found that in fact it was not fully plugged in :)
El 31/03/2012 01:04, iov...@inwind.it escribió:
May anybody out there explain why the connector
Hi:
I take a lot of photos for my web pages and every now and then I go back and find something that was in a photo that I
missed when it was taken. It's quite possible that the displayed photos were cropped from larger images showing more of
the system.
Have Fun,
Brooke Clarke
On 3/30/12 4:16 PM, Javier Herrero wrote:
I suppose that when it was photographed, nobody noticed it. After
noticed that it was no correctly plugged-in, the past pictures were
reviewed and found that in fact it was not fully plugged in :)
We do this all the time at JPL. You have someone come
Larry,
There really is nothing much to this modification. The Z3801A is already
designed to easily work on either interface, but most units are configured
for RS-422 as the default. It takes perhaps a half-hour to remove a few
zero-ohm SMD resistors and solder in a header strip. The simple
.
On Mar 30, 2012 10:45 PM, paul swed paulsw...@gmail.com wrote:
I have to say that in general I have been staying clear of this thread.
But its really a surprise that they are that sloppy and basing the results
on a Vectron OCXO. Not that I have ever had a complaint about those.
It just
On 3/30/12 8:43 PM, Larry McDavid wrote:
On 2/16/2012 Brad Stockdale announced here on Time-Nuts that he had a HP
Z3801A GPSDO for sale. I corresponded with Brad several times and he
reported that he sold one Z3801A to a list member and that this unit had
been modified to provide RS-232 rather
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