http://www.navcen.uscg.gov/?Do=constellationStatus
http://www.gps.gov/systems/gps/space/
IIRC: 6 planes, 6 slots each, so 36 to cover the sphere, and the GPS
aperture is big (high orbits) so guess up to 1/2 of the constellation could
ever be in view (... yeah, right): 18?
On Thu, Jul 9, 2015 at
The tube has a finite life time (probably less than 7 years of on-time, maybe
as low as 3 years) and costs a BUNCH to replace. I only run mine when I need
to. I warm mine up overnight before I use it to let it stabilize.
Plus make sure you run it for a day or two every 6 months or so to keep
My tbolt is reporting 29 currently active PRNs...
27 Sats in the sky.
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Well, you would think so...
There is 37 PRN codes, of which the top 5 is for testing.
However, in the modern ICD:
http://www.gps.gov/technical/icwg/IS-GPS-200H.pdf
you will find that there is an extended set of PRN codes, and for the
C/A code the modulation is the same, just that the
Is there a practical limit to the number of GPS sats overhead at any one
time? I ask this because I'd like to start parsing this info from my ublox
receiver and need to setup an array for the values. Memory is not unlimited
on my PIC.
Bob - AE6RV
==
Others have
Hi
Leave it off most of the time. Fire it up once a month for a day or two, set
things against it.
Bob
On Jul 9, 2015, at 6:07 PM, Don Latham d...@montana.com wrote:
I lucked out on a very squeaky clean FTS 4060 CS standard. Started up right
away and appears to have a strong tube.
My
Hello everybody,
just wanted to let you know that the NTP installer for Windows provided
by Meinberg has been updated:
https://www.meinbergglobal.com/english/sw/ntp.htm#ntp_stable
This installer provides the current NTP 4.2.8p3 stable version as well
as openSSL DLL 1.0.1p, which has been
It's the ion-pump that needs running.
Then, the OCXO needs heating before running the cesium tube.
Cheers,
Magnus
On 07/10/2015 07:25 PM, Pete Lancashire wrote:
Pretty much the same as Paul, I do it every 4 months. I'll soon have a
timer to turn the unit on a few hours every 120 days or
Who has a Cs standard I can buy. ?
Ulrich
Sent from my iPhone
On Jul 10, 2015, at 3:17 PM, John Miles j...@miles.io wrote:
Few people need the CS on all the time. The other funny thing on the HP
series you can turn the tube off and just use the OCXO after its been
adjusted accurately.
Does anyone east of the Rockies have any similar data?
At one time, the US FERC was going to deregulate frequency control to
reduce the amount of fuel used to accelerate in order to catch up. The
billing for power exchanged with a regional network is based on the
number of cycles produced or
This is a reply to the topic Loran-C reception in the UK with specific
emphasis on the Stanford Research FS700.
Apologies for starting a fresh topic but I'm still not able to take emails
from the list due to incompatibility problems with AOL and I don't see how
to reply to an existing
How good/bad would a LORAN-C frequency reference such as the Stanford
Research FS700 work in the UK? I live about 60 km to the east of central
London.
Is there any future for LORAN-C in the UK?
I am looking for a frequency reference that is not GPS - I already have a
GPS frequency reference but
As Mark says the tubes have a very finite life. So like him I turn mine on
as needed and every 6 months. My tube is on absolute fumes and is very very
marginal. But it still locks on its own in something like 16 hours with
almost impossible to see beam current.
So if you follow the every 6 months
From http://www.gps.gov/systems/gps/space/
Block IIA: 3 operational
Block IIR and IIR(M): 19 operational
Block IIF: 9 operational
so they should be 31 satellites working.
On Fri, Jul 10, 2015 at 7:20 AM, Magnus Danielson
mag...@rubidium.dyndns.org wrote:
Well, you would think so...
There is 37
My collection recently rolled over the year boundary:
http://www.megapathdsl.net/~hmurray/time-nuts/line/Calif-60Hz-2014-2015.png
The grid is 4 weeks in the X direction. The start of the Y offset is
arbitrary. I picked the start of the data.
The pairs of colors are a month. Within a month,
Dave check with the Triniity House web site they are the sponsors of the
Anthorn slave site, the master station is at Lessay on the St. Malo
penninsular so should be strong. There is (or was) a full descrition of the
option to GPSon the website. I believe there should be at least 5 years
to
Hi David
On 10/07/15 13:14, Dr. David Kirkby (Kirkby Microwave Ltd) wrote:
How good/bad would a LORAN-C frequency reference such as the Stanford
Research FS700 work in the UK? I live about 60 km to the east of central
London.
My Austron 2100's lock on to Anthorn, Lessay, and Sylt. I'm in
In message CANX10hBNdx82BawbHJ-DqbReEb3HH=rc2h4VckHx0Etfb=4...@mail.gmail.com
, Dr. David Kirkby (Kirkby Microwave Ltd) writes:
How good/bad would a LORAN-C frequency reference such as the Stanford
Research FS700 work in the UK? I live about 60 km to the east of central
London.
It
Dave,
I'm afraid I can't give you a quantitative answer about LORAN-C, but I can
say that eLORAN is your friend. It has recently been revived in the US and
it's doing all right in Europe, UK included. The promise in general is 50
ns to UTC. UrsaNav make some receivers and Chronos (who are a big
Hi
Loran should work fine in the UK as long as the European chains stay up and
running. They
don’t seem to be at any risk of shutting down at the moment.
Bob
On Jul 10, 2015, at 8:14 AM, Dr. David Kirkby (Kirkby Microwave Ltd)
drkir...@kirkbymicrowave.co.uk wrote:
How good/bad would a
Pretty much the same as Paul, I do it every 4 months. I'll soon have a
timer to turn the unit on a few hours every 120 days or something like that.
On Fri, Jul 10, 2015 at 6:53 AM, paul swed paulsw...@gmail.com wrote:
As Mark says the tubes have a very finite life. So like him I turn mine
THANKS, EVERYONE. OFF IT GOES.
DON
paul swed
As Mark says the tubes have a very finite life. So like him I turn mine on
as needed and every 6 months. My tube is on absolute fumes and is very very
marginal. But it still locks on its own in something like 16 hours with
almost impossible to see
Few people need the CS on all the time. The other funny thing on the HP
series you can turn the tube off and just use the OCXO after its been
adjusted accurately.
I run my HP 5065a Rb the same way. Power as needed and every 6 months.
So you are very lucky to have a good CS.
Rbs are a bit
On 7/10/15 6:23 AM, Azelio Boriani wrote:
From http://www.gps.gov/systems/gps/space/
Block IIA: 3 operational
Block IIR and IIR(M): 19 operational
Block IIF: 9 operational
so they should be 31 satellites working.
Plus various and sundry WAAS and similar signals?
Yes, and the 10th Block IIF is 4 days from launch.
We can expect there to take some time before it is brought into the
constallation.
It's only with Block III that we can expect this extended set of PRN
codes to be supported and used.
Cheers,
Magnus
On 07/10/2015 03:23 PM, Azelio Boriani
My tbolt is reporting 29 currently active PRNs...
27 Sats in the sky.
Have you checked the satellite numbers/svid?
They squeeze the WAAS satellites into the same number space.
Are TBolts new enough to know about WAAS?
--
These are my opinions. I hate
Hi Dave:
The quality of the signal goes down with distance from the transmitter. If you get a sledgehammer sounding signal then
you'll get a good time fix, but if you can barely hear the signal then the quality will be poor. Middletown, California
to Ukiah, California is strong, but any
Hi
On Jul 10, 2015, at 1:27 PM, Hal Murray hmur...@megapathdsl.net wrote:
My tbolt is reporting 29 currently active PRNs...
27 Sats in the sky.
Have you checked the satellite numbers/svid?
They squeeze the WAAS satellites into the same number
from:
http://gpsworld.com/eloran-progresses-toward-gps-back-up-role-in-u-s-europe/
“Both Norway and France have declared an intention to cease Loran
transmissions at the end of 2015. Moreover, France intends to dismantle its
Loran infrastructure in 2016. Arrangements for the commercial
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