rs ago. Good quality surveying antennas often has quite
decent filtering on each band they are designed for.
/Björn
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Hi Matthias,
There has been interference reported and resolved between 23cm and Galileo,
which have signals in the 23cm band.
/Björn
Sent from my Phone
> On 12 Jul 2022, at 09:20, Matthias Welwarsky via time-nuts
> wrote:
>
> Hi,
>
> if you're worried about in
.
Kind regards
Björn
Sent from my iPhone
> On 21 Nov 2021, at 16:34, Keelan Lightfoot wrote:
> [...]
> So if the receiver reports that a satellite is
> flying over the north pole, or that it is somehow observable when it's in
> the southern hemisphere, it's bec
ystem designed now yes. For one designed in the 70-ties,
still running the show No. Not in my view.
/Björn
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Björn
Sent from my iPhone
> On 12 Oct 2021, at 16:58, Bob kb8tq wrote:
>
> Hi
>
> I’m not suggesting that there is no issue. If this had been
> known to the original designers or users, routine shutdowns
> and restarts would have been a show stopper.
>
> I’
by running
that for a day you will get good information on how your receiver likes that
antenna spot.
/Björn
Sent from my iPhone
> On 23 Jul 2021, at 03:01, Robert DiRosario wrote:
>
> If I want to use GPS for time and frequency standards, just how solidly does
> the antenn
as a server but offset it with 1024wk. That
should bring back a useful ntp-service.
/Björn
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Hi Ben,
Symmetricom/Microsemi/Microchip has delivered NTP boxes with 12VDC antenna
voltage only a few years ago.
Looking at Antcom antennas most of them run on anything between 2.5 and 24V,
iirc.
/Björn
Sent from my iPhone
> On 8 Jul 2021, at 14:20, Ben Hall wrote:
> Good morni
Sending something like this to google ”gps splitter site:febo.com” is a good
start to search the archives.
/Björn
Sent from my iPhone
> On 27 Jun 2021, at 06:47, wb...@gci.net wrote:
>
> A DuckDuckGo or Goggle searco on "gps antenna split" will give you more than
ee his 'The awful german
> language'.
>
> Cheers
> Detlef
Pre WWII and a surpringly long afterwards German was the “first” foreign
language for engineering in at least Northern Europe. A few German language
course books remained in use into the 60s when my parents stu
e the unit to SNR if you want. Then SNR is also
not always comparable between manufacturers and models.
Kind regards,
Björn
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current list - but could not find it.
https://www.wassenaar.org/app/uploads/2020/12/Public-Docs-Vol-II-2020-List-of-DU-Goods-and-Technologies-and-Munitions-List-Dec-20-3.pdf
Did I miss it or has it moved somewhere else?
Kind regards,
Björn
Sent from my iPhone
> On 9 Jan 2021, at 00
http://www.geopp.com/pdf/gppigs06_pabs_g.pdf
/Björn
Sent from my iPhone
> On 14 Nov 2020, at 08:12, Tim S wrote:
>
> I'd doubt it's a choke-plate design - too small, and it looks like
> other Cheap dual-element designs I've seen come out of China. I do
(At least older) Novatel receivers can be set to lock the internal oscillator.
/Björn
Sent from my iPhone
> On 13 Aug 2020, at 18:26, David C. Partridge
> wrote:
>
> IIRC the Thunderbolt DOES lock its internal clock to the GP
Are not South Korea are building one? new eLoran chain? Are they transmitting?
But don’t underestimate the distances from south east Asia to the far side of
Australia.
/Björn
Sent from my iPhone
> On 7 Aug 2020, at 10:24, Poul-Henning Kamp wrote:
>
>
> Hugh Ble
Hi,
20us length is a mil standard. Described in ICD-GPS-060.
/Björn
Sent from my iPhone
> On 21 Apr 2020, at 13:37, Bob kb8tq wrote:
>
> Hi
>
> One of the simplest justifications I can think of for a dirt cheap “Chinese”
> digital ’scope is to capture short burst stu
compensation.
/Björn
Sent from my iPhone
>>> On 28 Mar 2020, at 23:01, kb...@n1k.org wrote:
>> Hi
>>
>> Just a guess, but I'd bet the answer is no.
>>
>> The only reason the SAASM receivers play with L2 is to demodulate the
>> encrypted
>> mil
Hi Mattias,
Then if you lock and control the 48MHz. You can also control the 1PPS edge to
the accuracy of the computed time... add 1s drift and lock uncertainty.
Read the beginning of the Tbolt manual. The Tbolt lets it’s locked 10MHz tick
the whole receiver.
/Björn
Sent from my iPhone
way up to 1024wk (translated into seconds) to
compensate for the wnro with your current receiver?
# Set packet delay
fudge 127.127.29.0 time1 0.020
-
Björn
Sent from my iPhone
> On 12 Jan 2020, at 04:55, Skip Withrow wrote:
>
> I have an NTP server that uses a Trimble GPS
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 wil
You can get the data from
The manufacturer
or from some calibration database like NOAA
https://www.ngs.noaa.gov/ANTCAL/#
Or geo++
Or the list of antennas built into the post processing software.
/Björn
Sent from my iPhone
> On 22 Nov 2019, at 19:02, Bill Dailey, MD, MSEng, MSMI
>
The N for North is because the phase center offsets are not symmetrical. With a
convention to orient the antennas the same way the offset could be corrected.
/Björn
Sent from my iPhone
> On 22 Nov 2019, at 17:07, Bill Dailey wrote:
>
> I would like to tag on to this. I have a large
323820334161. That one is dual
frequency and the antenna element makes a decent rover antenna.
/Björn
Sent from my iPhone
> On 17 Sep 2019, at 21:22, JAMES ROBBINS wrote:
>
> FYI: A listing for a brand new LEICA Choke Ring L1 GPS Antenna is on Ebay
> under number
://kb.unavco.org/kb/article/unavco-resources-radomes-520.html
/Björn
Sent from my iPhone
> On 7 Sep 2019, at 02:54, Bob kb8tq wrote:
>
> Hi
>
> Based on the papers I have seen, there is no “magic” shape that can be
> ignored.
> Part of the issue is that the cover is going to be
Run the plastic in a microwave oven, with a glass of water. Don’t use it if the
plastic gets warm.
/Björn
Sent from my iPhone
> On 6 Sep 2019, at 21:45, David G. McGaw wrote:
>
> Also, as I have found, some plastics don't just delay but actually
> absorb the signal.
Hi David,
It is up an running again in Initial Services.
https://www.gsc-europa.eu/system-status/Constellation-Information
https://www.gsc-europa.eu/notice-advisory-to-galileo-users-nagu-2019027
/Björn
Sent from my iPhone
> On 22 Jul 2019, at 14:06, David Slipper wrote:
>
>
some tech analysis.
http://www.navsas.eu/node/610#16th%20July%20Update
And some opinions.
https://insidegnss.com/galileo-outage-update-service-failure-poses-serious-questions/
/Björn
Sent from my iPhone
> On 17 Jul 2019, at 03:38, Mark Sims wrote:
>
> My F9T started tracking Gal
InsideGNSS is responding really slow (only from Sweden?) My phone browsers gave
up. My computer Mozilla finally got it.
/Björn
> On 14 Jul 2019, at 08:24, Leif Johansson wrote:
>
> That site seems to be down now
>
> Skickat från min iPhone
>
>> 14 juli 2019 kl. 00:
over 90 hours.
Can Galileo absorb this within the service level stated in Initial Service
documents?
https://www.gsc-europa.eu/system/files/documents/Galileo-OS-SDD.pdf
(Page 26) Availability of OS UTC service - >87% over 30days. Equals outage of
3.9days (93.6
Would likely be the UK MSF signal. /Björn
Sent from my iPhone
> On 6 Jul 2019, at 14:39, D. Resor wrote:
>
> From another list I was directed to this link for those who do not have a
> shortwave radio.
>
> http://websdr.ewi.utwente.nl:8901/
>
> I entered the f
Hi Mark & David,
Perhaps this article is useful for the discussion.
https://insidegnss.com/measuring-gnss-signal-strength/
/Björn
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strengths. Some receivers - mostly older - have a narrow gap where they
perform optimally. There should be information in the receiver documentation
somewhere. Then you can check with adding antenna gain - cable attenuation -
splitter attenuation + any amplifiers (maybe withi
me on the front panel...
If you control the programming of the Arduino you can add 1024 weeks to the
year/date and you should have a proper front panel display again.
/Björn
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If you ignore date/year, everything else should be just as before.
—
Björn
Sent from my iPhone
> On 6 Apr 2019, at 05:40, Joe Leikhim wrote:
>
> Just checked my wonderful Garmin GPS12XL tonight. before midnight UTC I
> checked navigation and UTC time and all was well. I di
rge number of their cars are affected.
Thats a bit strange considering the timeframes involved. Would have imagined
that the self driving company bought units within say the last five years...
why would the GPS vendor sell receivers that will fail for this reason so soon
after purchase?
/Björn
Hi Brooke,
SV position in circular orbit repeats at 12h sidereal, but ground relative
az/el repeats at 24h sidereal. This is because of the earth 24h rotation rate.
After 12h your earth position will be 180deg away from (inertil) start position.
—
Björn
Sent from my iPhone
> On 21
seems to be options for wwvb reception also in 1u 19” format.
https://www.meinbergglobal.com/english/products/rack-mount-1u-ntp-server.htm
/Björn
Sent from my iPhone
> On 2 Sep 2018, at 15:48, Tim Shoppa wrote:
>
> Some stats in historic NTP surveys show that WWV and WWVB based refcloc
20us (+50%-20%) - 16us to 30us is indeed very wide.
The boss signing the document has dual Master of Science degrees... there were
certainly engineers contributing to the document.
Are there any better standards around?
/Björn
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Hi Bernd,
One reference to 20us 1PPS pulse length is the ICD-GPS-060, see figure 3-2,
page 3-3 (pdf page 19)
https://www.navcen.uscg.gov/pdf/gps/ICD-GPS-060B.pdf
Group - Are there other standard documents defining duty-cycle, voltage levels,
rise times etc?
MfG
Björn
> On 14 Aug 2
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