Hi
Most of what you see suggests > 10’ / 3M between GPS antennas. They seem to be
concerned about
a variety of things. Exactly how those concerns translates into the magic
distance has always been a
bit obscure.
Bob
> On Nov 23, 2019, at 7:07 PM, JAMES ROBBINS wrote:
>
> I would
I have two identical GPS antennas mounted side by side about a foot apart
feeding two different receivers with no observed problems.
Jeremy
On Sat, Nov 23, 2019 at 4:12 PM JAMES ROBBINS
wrote:
> I would appreciate feedback on the question of the ill effects (if any) of
> mounting two GPS
Peter will believe we both have purchased items from the same person at
MIT. Always has interesting bits of old gear. I did indeed pick up a
gen-rad tuning fork reference/standard at MIT Type 723 c and 1000 hertz. It
works well and cleaned up even better.
If I had seen the item you picked I will
I would appreciate feedback on the question of the ill effects (if any) of
mounting two GPS antennas in proximity to one another. I am intending to mount
a 58532A L1 antenna and a L1/L2 antenna on the same mast on my roof separated
by around 1-2 feet. I have attached a photo to show the
Sorry, I read it as "NRCAN wil *only* do L1"
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
p...@freebsd.org | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
No... NRCAN is one of the few that do not require both L1 and L2 observables.
It also accepts only L1. /Björn
Sent from my iPhone
> On 23 Nov 2019, at 08:22, Poul-Henning Kamp wrote:
>
>
> In message
> ,
> Mark Sims writes:
>
>> NRCAN / csrs-ppp will do L1 only data. Typical
On Sat 2019-11-23T09:29:09+0100 Jean-Louis Rault hath writ:
> I'm wondering why the largest hand is used for minutes, and the smaller
> hands for hours and seconds
If the purpose of the clock was to determine what time it was from an
astronomical observation then a second hand was not sufficient.
I like your rather poetic point of view :o)
Jean-Louis
Le 23/11/2019 à 14:27, Matt Osborn a écrit :
Pretty nice, I've always wondered why clocks weren't designed this
way. Hours last too long and estimating minutes from the hour hand is
minimally useful while seconds are too fast and mostly
Hi Iain
There are different institutions on the observatory site in Uccle near
Brussels (the planetarium is somewhere else) See
https://www.astro.oma.be/en/.
I have regularly some meetings with peoples of the Belgium Institute for
Space Aeronomy there, so i'm going to ask them if there is
My idea is that for the time this was built and used, there was little or
no need for really
accurate time keeping in most astronomy work. The high accuracy/precision
needs
really didn't arise until the beginning of what I'll call "modern
astronomy", which I'll loosely
define as the discovery of
Celestial navigation users might object to the notion that seconds are not
important.
That is, if you can find anybody still exercising that art. In that arena,
folks are
taught to read seconds first, then minutes, then hours.
Depending on the latitude, one second can lead to something like 1/4
Hi Marcus
On 23/11/19 14:31,You wrote:
On a related note, some trivia that might be of interest.
The master pendelum clocks is still in their basement in Observatoire
Royal de Belgique, I've seen them. They have their dedicated
heating-system to help control the temperature, ovenizing the
Hi,
On a related note, some trivia that might be of interest.
The master pendelum clocks is still in their basement in Observatoire
Royal de Belgique, I've seen them. They have their dedicated
heating-system to help control the temperature, ovenizing the whole
basement building (the clocks are
Hi
That’s a very unique piece of history. Hopefully you were able to get it.
Bob
> On Nov 23, 2019, at 3:29 AM, Jean-Louis Rault wrote:
>
> Hi all
>
> A friend of mine offered me a secondary electric clock that was in use at
> Observatoire Royal de Belgique, in Brussels, at the end of the
Pretty nice, I've always wondered why clocks weren't designed this
way. Hours last too long and estimating minutes from the hour hand is
minimally useful while seconds are too fast and mostly irrelevant for
human use.
Reading the time as so many minutes past whichever hour is very
natural and
The clock is of a type known as a regulator.
This style of design minimises all factors that could reduce performance.
One method is to reduce the number of moving parts to a minimum,
so there is a wheel for the escapement with the seconds hand on it (bottom),
a wheel for minutes, (middle), and a
I know this is a little bit off-topic, but I am looking for the EPROM
content of the HP8566A or HP8568A spectrum analyzers for a computer
archaeology project.
Direct email reply, please.
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
p...@freebsd.org | TCP/IP since RFC 956
In message
,
Mark Sims writes:
>NRCAN / csrs-ppp will do L1 only data. Typical results have errror ellipses
>in the 300-500 mm range.
Then your RINEX files must have some flaw in them.
NRCAN process both L1 and L2:
OBS G L1C L2C C1C C2C
I get horizongal uncertainties of
Hi all
A friend of mine offered me a secondary electric clock that was in use
at Observatoire Royal de Belgique, in Brussels, at the end of the 19th
century.
The manufacturer is Peyer Favarger & Co, Neuchatel, Switzerland.
I'm wondering why the largest hand is used for minutes, and the
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