Hi
How much impact your distribution setup has on the OCXO phase noise depends a
*lot* on how quiet the
OCXO is. If it is in the -170 dbc/ Hz range, then pretty much anything can mess
up the phase noise ….
Bob
> On Mar 27, 2019, at 5:05 PM, Tobias Pluess wrote:
>
> Hi Leo,
>
> sorry for
By the way, I just did some more testing on stability.
I once tried to use the internal PLL of the microcontroller to boost the OCXO
frequency to the max. 72 MHz which my microcontroller accepts. While this would
greatly increase the frequency measurement resolution, it decreased stability
Hi Leo,
sorry for my late reply.
I have not yet measured the phase noise of my finished unit, since I am still
waiting to complete my phase noise measurement equipment.
However, I have a decent test report for my OCXO, where the phase noise
spectrum is also plotted. I don't expect my
Relative to Harrison's method of star position measurement and timing, and
the
possible effects of diffraction thereof:
Hanbury Brown's book "The Intensity Interferometer" may provide some useful
insight about various error sources, even though in a different context,
that of
measurement of a
On Wed, Mar 27, 2019 at 2:00 AM jimlux wrote:
>
>
> To get 1 second accuracy, you need 360/86400 = 0.004 degree
> measurements. That's 0.073 milliradian - 1 cm at 140 meter distance.
>
> I'm not sure an "edge" is sharp enough (diffraction, etc.), although
> your eye is pretty good at
Hi All,
As you know I bought the yellow one.
My Fluke 87V has arrived and I've been playing with it for a few hours.
I love it.
Most importantly for this group it read 5.000 on my voltage reference.
But seriously what I love is its response, It's so much quicker than what I
used before. The
There is a large period literature on ³dialing² which not only included
sundials, but all sorts of ways to measure time from celestial objects
using angles. Discussions of trigonometry, surveying, navigation, and
³dyaling² in relationship were also quite common during the period. These
could be
Hi
There are two programs that I am sure can communicate correctly with the F9T.
1) The ever popular Lady Heather (in the current beta). Thanks Mark !!.
2) The uBlox supplied uCenter program from version 19 on.
I *suspect* that other programs can / will soon communicate as
Hi Bob,
I would like to know if there is a program to communicate with the F9T.
If I understand the acquisitions you have made with the TICC, they include
a direct input from the 1PPS of the F9T and a PPS by dividing the 5MHz of the
5065.
Is it correct?
Luciano
Da "time-nuts"
Hi Bruce:
Would the David White 60 Degree Pendulum Astrolabe also work?
https://prc68.com/I/PendulumAstrolabe.shtml
--
Have Fun,
Brooke Clarke
https://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
axioms:
1. The extent to which you can fix or improve something will be
Of course the time scale will be much shorter for a star occulted by an edge
etc on Earth.
The longer time scale for a lunar occultation is due to the slower relative
angular motion of the moon with respect to the star than the motion of the
Earth with respect to a star.
Bruce
> On 27 March
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