Phil,
as soon as a receiver sees more than 3 sats there is redundant information
available. The receiver can use this redundant information in two ways:
a) to improve the solutions for the position
or
b) to improve the solutions for the time
but not both at the same time.
That implies that
In message e660d55b75514e29a5735af7dcb48...@athlon, Ulrich Bangert writes:
The receiver can use this redundant information in two ways:
a) to improve the solutions for the position
or
b) to improve the solutions for the time
but not both at the same time.
That's just bogus.
First of all, you
Poul-Henning Kamp skrev:
In message e660d55b75514e29a5735af7dcb48...@athlon, Ulrich Bangert writes:
The receiver can use this redundant information in two ways:
a) to improve the solutions for the position
or
b) to improve the solutions for the time
but not both at the same time.
That's
I'm looking for a source for low-thermal EMF solder (Cadmium-Tin probably)
in the UK.
If anyone can point to a source for this and indeed of Te-Cu bannana
plugs/sockets/other connectors that I can wire up myself (Pomona only seem
to sell pre-wired ones in Te-Cu).
Many thanks
Dave
2D positioning requires at least 3 sats for resolving Lat, Long, T
(really X, Y, Z and T which a fixed relationship between X, Y and Z so
given two the third will be given, as the heigth is assumed).
This has been discussed before, but I still don't really understand it.
I assume they take
I picked up a box from over there that says ...5 MH REF DISTRIB... ,
which I assume stands for 5 MHz Reference Distribution. It was made
by Satellite Transmission Systems of Hauppagge, NY. 2 BNC connectors
on one end, 3 SMA's a Red LED Alarm light and a DB-15 connector.
A real long shot, I know,
Anyone got any good Linux time systems for PCs ?
I now have a PC on my home system that has Linux fedora on it and I'm
keen to learn how to make it a useful new member of my network.
I did dabble with Redhat Linux once before in the 1990s, and still have
the scars to show for it, so please
Since you beat me by *THREE SECONDS* I shouldn't help you, but I have
one of these boxes and have partially figured it out. What do you want
to know?
Ed
Richard W. Solomon wrote:
I picked up a box from over there that says ...5 MH REF DISTRIB... ,
which I assume stands for 5 MHz Reference
I now have a PC on my home system that has Linux fedora on it and I'm
keen to learn how to make it a useful new member of my network.
It's probably already running ntpd and setup to get time from a few pool
machines out on the net.
Start by doing:
ntpq -p
If that works, look in
RedHat in the 90s was terrible. It's much better now.
Last thing I read about ntp was that it was kind of broken for high
precision stuff on Linux and people tend to use FreeBSD. I duplicated the
work of one of the time-nuts by following his site here:
http://www.febo.com/pages/soekris/
Even
In message: 4a0c7a74.50...@tiscali.co.uk
Dave Ackrill dave.g0...@tiscali.co.uk writes:
: Anyone got any good Linux time systems for PCs ?
:
: I now have a PC on my home system that has Linux fedora on it and I'm
: keen to learn how to make it a useful new member of my network.
:
: I
Is there any consensus for the reasons why Linux performs poorly? I was
thinking about setting up a server as well (possibly using a little ARM-based
single-board computer that runs Linux).
Randy.
--- On Thu, 5/14/09, Robert Darlington rdarling...@gmail.com wrote:
From: Robert Darlington
At 05:24 PM 5/14/2009, M. Warner Losh wrote...
I'd try the FreeBSD distribution of Linux.
Ouch. In some circles, those are fightin' words.
FreeBSD is _not_ Linux, in any way except being Unix-like.
___
time-nuts mailing list --
Is there any consensus for the reasons why Linux performs poorly? I
was thinking about setting up a server as well (possibly using a
little ARM-based single-board computer that runs Linux).
Consensus? I doubt it.
My reading. Lots of cooks. None of them are time geeks.
There are a lot
In message: 20090514220030.68e47b...@ip-64-139-1-69.sjc.megapath.net
Hal Murray hmur...@megapathdsl.net writes:
:
: Is there any consensus for the reasons why Linux performs poorly? I
: was thinking about setting up a server as well (possibly using a
: little ARM-based
I'd try the FreeBSD distribution of Linux.
Ouch. In some circles, those are fightin' words.
I interpreted it as a joke, like telling a Windows user to install Service
Pack Linux.
If all you want is to run a time server, FreeBSD will do a better job than
Linux. In particular, the Soekris
Assuming you are looking for better time than you can get from just
network servers, you can add a local time source.
EASY WAY
If you want good time at low cost, and have a generic PC, connect
something like a Garmin 18x LVC to a serial port and install
FreeBSD. Easy to configure and
In message: 20090514223310.0d552b...@ip-64-139-1-69.sjc.megapath.net
Hal Murray hmur...@megapathdsl.net writes:
: I'd try the FreeBSD distribution of Linux.
: Ouch. In some circles, those are fightin' words.
:
: I interpreted it as a joke, like telling a Windows user to install
Pinout is as follows - I think - remember that this is a work in
progress
1 - no connection
2 - alarm output - High = alarm, low = normal (TTL)
3 - probably 'reference fail' - High = fail, low = normal (TTL)
4 - EFC okay - High if 4V8 EFC 7V5 else low (TTL)
5 - no
That should give me a good start on this. Thanks very much for the info.
Sometimes you find some interesting items over there. I picked up two
boxes that had 4 SMA's marked 10 MHz, 75 MHz, 750 MHz and 7,975 MHz. They
also had a MIL style power connector with the mate attached.
Turns out they were
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