I'm looking at using a Spectracom 8140 for 10Mhz distribution, and they
specify using a DC-blocking 50-ohm terminator on each run.
These seem to be odd enough that none of my usual sources have them
(75-ohm DC-blocking terminators yes, 50-ohm, no).
While it's easy enough to chain a DC block and
Hi
> On Jun 3, 2018, at 7:35 PM, Mark Sims wrote:
>
> As far as I'm concerned anything that you can do to improve the position
> accuracy, environmental changes, noise environment, etc is a good thing.
> Minimizing errors and disturbances can't hurt and may even improve things.
> How
As far as I'm concerned anything that you can do to improve the position
accuracy, environmental changes, noise environment, etc is a good thing.
Minimizing errors and disturbances can't hurt and may even improve things. How
much any improvement provides ... ??? But time nuts tend to
I had also modified my HP 53132A but kept it extra simple and the
modification
allows me to use the counter normally..
On my HP 53132A I just mounted a toggle switch in one of the unused holes
for
the back panel BNC input connectors and wired the switch in series with the
power
connector. The
*Important Update:* due to a mistake in my thinking, I had to upgrade the
fuse I added to a 220V, 3A model to match the fuses on the internal
switching power supply. My original plans were to mount the fuse on the
power supply PCB and use it only to fuse the small power adapter used to
power the
Hi
Location will always impact things a bit. At some point it does become a minor
contributor. What point that is varies with a lot of things. One of them is
indeed
the propagation path to the satellites.
How much the ionosphere and troposphere mess things up is very much a “that
depends”
Hi,
On 06/03/2018 10:07 PM, Chris Caudle wrote:
> On Sun, June 3, 2018 12:57 am, Mark Sims wrote:
>> Well, with a little prodding and help from Magnus, I now have the
>> Trimble devices outputting RINEX files.
>
> Is this applicable to a Thunderbolt, and would this improved position
> accuracy
On Sun, June 3, 2018 12:57 am, Mark Sims wrote:
> Well, with a little prodding and help from Magnus, I now have the
> Trimble devices outputting RINEX files.
Is this applicable to a Thunderbolt, and would this improved position
accuracy be expected to improve the time accuracy from a
Hi Adam,
OK, good to hear about the progress. Let us know about what you learn
and if you need additional input. I'm curious what is the cause of this
error.
Cheers,
Magnus
On 06/03/2018 04:09 AM, Adam MacDonald wrote:
> Thanks Gents,
> I ran the additional tests recommended by Poul and Magnus
I did a test on a 1 second vs a stripped out 10 second rate from the same 24
hour run. The differences were down in the noise. Some people have actually
reported slightly better results with 30 second vs 1 second data... but I
doubt that... I suspect they used different data sets and the
Hi
If you are doing a longer run into one of the data analysis services - it does
not seem to matter much what the
spacing on the readings is. One second data does not seem to produce any better
result than 30 second data.
I don’t think that the 3 second rate on the Trimble will have much
I haven't done any extensive testing of how accurate the results are, but
comparing them to the position produced by a L1/L2 (error ellipses < 50mm) they
seem to be correct.
One issue to be aware of is that some receivers want altitude in othometric
height (MSL) and others use geoid (GPS)
hol...@hotmail.com said:
> A 5 hour 1Hz run was sent to CSRS-PPP and the lat/lon/alt error ellipses
> were in the 250/250/700 mm range...
Does the position agree with other chip sets?
--
These are my opinions. I hate spam.
___
time-nuts mailing
Thanks Gents,
I ran the additional tests recommended by Poul and Magnus and I concur that the
interpolator board is not the likely culprit. I reversed the input cables as
well as the pods in separate experiments to rule out those contributors with no
different results. I thought it may be a
Hi,
It would be nice to have direct access to the carrier-phase, but to
rebuild that from doppler takes some care. Doing a mock phase-setup is
trivial, but one then have the full noise of the code-phase, as well as
double ionspheric offset to overcome, so that is not the best starting
point. This
15 matches
Mail list logo
