Hi Michael,
Thanks, that plot and the info gives a useful comparison.
I think in light of everything, doing some tests with a generally
upgraded setup would be the way to go for now.
There would actually be several rubidiums, although initially with a
bit of cheating - 1 counter, a 10PPS refere
>Make sure you have good skyview (aka good geometry) and very little
>multipath. Both effects can affect the precision of your solution
>much more than the ionospheric delay variation.
Main one is on the peak of a slate roof. Nothing else much higher
around except a large sycamore tree. There's
I promised a plot and here it is.
In a bit more detail:
(a) "GPSCV 800 km baseline" is single-frequency transfer between two
5071s with standard tubes. I've divided by sqrt(2), assuming both
clocks contribute equally to TOTDEV.
(b) "std tube spec" is from the 5071 manual, for comparison
(c) "sa
I should have added, if you do all of the above, the improvement in
stability over just using a sawtooth-corrected PPS is not all that
spectacular, a factor of two or three. I'll post a plot of some data
tomorrow.
Cheers
Michael.
On Wednesday, 15 June 2016, Michael Wouters
wrote:
> If you foll
Hi
With some searching and dedicated bidding, you can find older L1/L2 GPS
gear fairly cheaply. It may take a year or two of bidding to get something you
can use….That gets you back to the issue of “am I fiddling around waiting
to do something or doing it”.
Bob
> On Jun 14, 2016, at 4:16 AM,
If you followed the link to www.openttp.org and are wondering where the
software is, follow the link on the home page to GitHub and then look in
the Develop branch. The ublox branch is for the new '8' series receivers.
Cheers
Michael
On Tuesday, 14 June 2016, Michael Wouters wrote:
> Hello Angu
On Tue, 14 Jun 2016 21:37:20 +1000
Michael Wouters wrote:
> On Tue, Jun 14, 2016 at 6:16 PM, Angus wrote:
> > I'm planning to test some rubidiums again, but since Santa never did
> > get me that hydrogen maser I asked for, I'm still stuck with ordinary
> > gps timing receivers as a separate m
Hello Angus
If you have 3 rubidiums of similar stability + 3 counters, you could
do a 3-cornered hat.
Otherwise, GPS common view to a better clock may be an option. If you
are reasonably close to a national standards lab, you might be able to
use their time-transfer files to compare your rubidium
Hi,
I'm planning to test some rubidiums again, but since Santa never did
get me that hydrogen maser I asked for, I'm still stuck with ordinary
gps timing receivers as a separate medium to long term reference. The
atmospheric issues are probably the main ones I would like to get rid
of, although th