On 3/22/17, Trent wrote:
> https://goo.gl/photos/JZhBbFKFzkBAykti6
> Why would a GPS module produce jitter with a pattern like this?
Trent, I decided to R.T.F.M.(read the fantastic manual ;-)
It looks like that in your Telit module, there is a mode called
> https://goo.gl/photos/JZhBbFKFzkBAykti6
> Why would a GPS module produce jitter with a pattern like this?
Trent, I must admit I have not seen such a four hour "spike" before in
the NMEA latency, however a clue may be that the GPS ephemeris
(broadcast by the SV's) orbit description is valid only
pa tea, a scone and solve a Sudoko
before telling us the time !
Regards, Kiwi Geoff (Christchurch , New Zealand).
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Will Kimber wrote:
> If you listened to Radio New Zealand National news New Year's day
> morning you would have heard then stating there will be 7 pips at 1:00pm.
>
> However there were only 6 !!! So what happened?
I was listening to both of the above events too, and agree with your
comments Wil
Andy ( ZL3AG ) wrote:
> Do they add the leap second at the same moment in time throughout the world,
> or are the clocks here in NZ running 13 hours and 1 second ahead of those in
> the UK for half of Jan 1st?
As far as our "Time Pips" in New Zealand go, it didn't appear to be
correct, right from
Mike Cook wrote:
> It wouldn't surprise me, but you have a reference for this?
I first read about this issue in the official Ublox forum Mike - try this link,
http://tinyurl.com/Fake-M8Ns
- at time of writing it leads to some of the messages that discuss
the issue with photos and examples of M
Hello All - and Seasons Greetings,
One of the advantages of the recent hobby drone phenomena - it has
brought to the market a lot of low cost GNSS modules that are
lightweight for drone flight control systems. Those of us with other
hobbies, like "Time Nuts" and RTK - these low cost modules can be
one - Geoff nervously twitches ;-) !
Have a "click" and see if the little Utility makes sense where you
live in the world.
Tom's Nixie Countdown clock is found here:
http://leapsecond.com/java/nixie.htm
Hope that helps anyone playing with Time and Dates in JavaScript - it
can be V
re is the modification I made to Tom's "Countdown Clock" (on my PC
only NOT Tom's website! ).
// -Edit area---
// Leap second countdown clock.
utc = new Date(now.getTime() + (now.getTimezoneOffset() * 60 * 1000));
var leap =
azing - enjoy some UK history:
http://righto.com/sinclair
Regards, Kiwi Geoff (Christchurch, New Zealand).
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David Taylor wrote:
> The new Garmin 3.70 firmware which corrects the problem
I agree, the new version 3.70 at last does not suffer from excessive
NMEA latency.
It looks like our messages to Garmin finally got through David.
Last night I did a 12 Hr test of the NMEA latency with the new 3.70
ver
On Tue, Mar 29, 2011 Murray Greenman wrote:
> I've also observed that JJY40 is now off the air. It has been excellent
> reception down here in New Zealand for many years, generally better than
> the JJY signal on 60kHz, where of course it competes with other signals.
>
> JJY40 was typically strong
David Taylor wrote:
> Have you heard anything from Garmin? I take it you have reported the issue.
I have only received an automated reply from the Garmin site so far David:
Category Or Device: GPS 18 Serial
Problem Description:
I measu
Hello fellow Garmin 18x users,
About 2 months ago, I wrote a message on this list - that my Garmin
18x was 1 second slow to UTC.
With the help of a few other kind folk here, we came to the conclusion
that the only firmware version a "Time Nut" should use with the 18x is
3.20
I noticed today that
Rix Seacord wrote:
> The SureElectronics unit is general within 10 feet with no observed off the
> wall excursions.
One possibility Rix, perhaps it may be like the Garmin 18x which has a
very stable position with no sudden excursions ( with its Average Mode
ON ).
The 18x gives position in discret
r current software version is newer than the update version.
Do you want to replace your current software version with an older version ? "
We click the YES box.
To do the above timing tests I had v3.5 loaded into my 18x, I then
reverted to v3.2 and ever
Joseph Gray wrote:
> If I am using the NMEA data (as in the Garmin is the only time
> source), what firmware is recommended by all those using a GPS18x-LVC?
I thought I would run some tests for you Joe, using Version 3.0 and 3.2
Although I myself have run version 3.0 for a number of months (when
David Taylor wrote:
> Thanks, Geoff. I have just look for that version on the Garmin
> Web site but could not find it,
David, a quick Google Search found this:
http://www.gawisp.com/perry/oem_sensor/
>From there I downloaded: GPS18xPC_LVC_300.exe
and it is an exact file match for the fi
Björn wrote:
> Did you and I run into the same issue with NMEA from old Jupiter
> receivers? (many years ago at the now dead forum at gpskit.nl)
We may have Björn, I know we have communicated before, but I'm not
sure on what topic(s).
I have never owned or played with a Jupiter - so I have never
EA output and
> it's not even a consistent distance delayed from the PPS, varying quite a
> bit.
Yes, that is why it got tricky for me David, because sometimes the GPS
gave the correct UTC time, and sometimes the UTC time was one second
slow - depending on how much the NMEA sentence
not to be so excited about new firmware updates.
Kiwi Geoff (Christchurch, New Zealand).
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that time of the year when "pending leap seconds" can
apply (although Dec 31 2010 is NOT going to be a leap second year).
So I wondered, any other folk out there with a Garmin 18x - is it 1
second slow to UTC ?
Regards, Kiwi Geoff (Chris
Brooke Clarke wrote:
> When you look at the time difference between the recent events on a geologic
> scale you could say they all happened at the same time.
Hi Brooke, I'm writing from my home in Christchurch, New Zealand.
"Local Time" of the event is an important variable.
Last Saturday we ha
Att NZ Time nuts:
Normally National Radio (AM and FM) is a reasonable source of time in
New Zealand, and the time pips are normally within about 200 ms of UTC
atomic time (due to coding delays in the digital transfer of the audio
program).
However today at 11am and Noon (local time 18 May 2009) I
bility) of the original
almanac held in firmware, but the 18X sensor wont provide the almanac
(although the manual / data sheet for the 18X says the command can be
used).
Regards, Kiwi Geoff.
http://www.geocities.com/kiwi_36_nz
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Hello All,
Just a heads-up for anyone who may be using an older Lassen GPS.
As per this 2005 advisory: http://tinyurl.com/4dr26y
There are still some Lassens around that have this "pending" bug in 2008.
Regards, Kiwi Geoff (Christchurch, New Zealand).
http://www.geocities.com/
to wait so long for a "good"
almanac to be transmitted from "another" GPS satellite in the fleet.
Thanks Chris.
Regards, Kiwi Geoff.
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an almanac that had PRN 32 marked unhealthy.
So maybe tomorow morning (when PRN 32 next smiles down on New Zealand)
all should be fine and dandy Chris!
So no panic about testing Chris, the AC12 may be OK
Waiting, waiting, waiting!
Regards, Kiwi Geoff.
h
1, so I think this is a strong indication
that 32 is too high a number, and that the firmware may only handle
PRN's from 1 to 31.
So I will be most interested to see if your AC12 can receive PRN 32 Chris!
Regards, Kiwi Geoff.
http://www.geocities.com/kiwi_36_nz
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hat has an AC12, and can say if it
can use PRN 32?
Thanks, Kiwi Geoff.
http://www.geocities.com/kiwi_36_nz
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wnload an almanac once a day, so that is
why some of us will have to wait a 24 hour period before we know
whether our GPS can count all the way up to 32
Regards, Kiwi Geoff (New Zealand) .
http://www.geocities.com/kiwi_36_nz
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PRN32 on various Garmin GPS's but I think it
is just an almanac issue - may have to wait until tomorrow for those
to work.
PRN32 is heading towards the USA, so should be "heard" there soon!
To see what part of the earth PRN32 is currently transmitting to, see:
http://tinyurl.com/
l.com/2u3nq7
Regards, Kiwi Geoff.
http://www.geocities.com/kiwi_36_nz
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http://www.geocities.com/kiwi_36_nz/alm2pos/alm2pos.htm
I just checked with the latest YUMA almanac from:
http://www.navcen.uscg.gov/gps/current/current.alm
and it still works (even with PRN 32).
It shows you the sateliite position (even it is marked as unhealthy in
the almanac).
Regards Kiwi Geoff
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