I'm partial to the Youyue 858d. Not because it is particularly good, but
because there is some nice open-source firmware for it. It's also rather
inexpensive (around $40). Note that there are a lot makers of -858d
stations. Not all use the AVR chip that the open source firmware runs on
Hi Tani,
> Q: Why is there an timing offset of 20ns average between identical
> commercial off-the-shelf GPS modules?
Without testing I can't tell if 20 ns is normal for your receiver or not. It
doesn't seem totally out of the ordinary but some investigation would be in
order in case part of t
This may be a dumb question, but I am new to using LadyHeather with my
Thunderbolt (previously it had been slaved to driving a clock display
but that broke, which made me get around to installing a serial card in
my linux box)...
Are these "events" something I should be able to see in LH? If so w
Fellow time-nuts,
Here is the official statement.
Cheers,
Magnus
Forwarded Message
Subject: CGSIC: FW: Official Press Release - GPS Ground System Anomaly
Date: Thu, 28 Jan 2016 01:13:13 +
From: Civil Global Positioning System Service Interface Committee
(CGSIC)
Reply-To
Paul Boven schrieb:
> Hi everyone,
>
> Has anyone else seen GPS time jump by -13.7 usec today?
> I just heard from several geographically quite distributed radio
> observatories that they have seen their GPS receiver(s) jump compared to
> their in-house standards.
We have now received an official
Magnus Danielson wrote:
> Charles,
>
> Considering how the UTC parameters (IS-GPS-200H, Table 20-IX and section
> 20.3.3.5.2.4) got upset for some of the SVNs, the correction from GPS
> time (as corrected for that PRN) into UTC got a shift of almost 13,7 us.
> As a GPS receiver receives informatio
This just came in
Air Force Official Press Release - GPS Ground System Anomaly
On 26 January at 12:49 a.m. MST, the 2nd Space Operations Squadron at the
50th Space Wing, Schriever Air Force Base, Colo., verified users were
experiencing GPS timing issues. Further investigation revealed an issue i
brian wrote:
> This may be a dumb question, but I am new to using LadyHeather with my
> Thunderbolt (previously it had been slaved to driving a clock display
> but that broke, which made me get around to installing a serial card in
> my linux box)...
>
> Are these "events" something I should be ab
Magnus Danielson wrote:
> It's interesting to see how consistent these errors are.
> On the other hand, it is interesting to see how it varies even for the
> same PRN. Look at how PRN 09 varies between +0.002 us and -13.696 us.
Hm, I think basically it doesn't vary. We fortunately just saw the poi
I have a hack patch in my copy of the TBolt driver for ntpd.
01-21T21:42:15 ntpd[7559]: TBolt 1 Other: -2.79397e-09 -8.88178e-15
01-22T17:21:08 ntpd[7559]: TBolt 1 Other: -4.65661e-09 -1.06581e-14
01-23T15:13:38 ntpd[7559]: TBolt 1 Other: -6.51926e-09 -1.15463e-14
01-24T17:08:37 ntpd[7559]: TBolt
> Le 28 janv. 2016 à 07:37, claude...@aliceadsl.fr a écrit :
>
> Thanks for your reply
>
> I don't think it's a computer problem because I can see the GPS is not locked
> when I compare the 10 MHz output with a Rubidium.
> By the way, I don't use software but the screen command under Linux.
>
Hi
I suspect that a few connectors get added to that list. On the 5335 there is a
*lot* more on the board.
So, you need to source a handful of 1970’s era switches and connectors. The
connectors (obviously)
need to mate with whatever is on the other side. That could be pretty easy. It
could be
Hi
> On Jan 27, 2016, at 7:56 PM, time...@metachaos.net wrote:
>
> Bob, et. al.,
>
> Thanks for the advice and information. That has helped a lot in closing some
> holes and gives me a lot to consider. I am continuing to research and learn,
> this is not a short term project as in building it th
On 1/27/16 11:46 PM, Magnus Danielson wrote:
Fellow time-nuts,
Here is the official statement.
Cheers,
Magnus
I know we're all time-nuts here and not position-nuts. The thing in the
statement that was intriguing was about GPS guided munitions.
13.7 microseconds is about 4.5 km.
I've not
> I've not been following this discussion too closely, but were the nav
> solutions from the GPS steady and continuous during the event (that is,
> was just a time discontinuity). I'm guessing that since the problem was
> only in the "how to convert from GPS to UTC" parameters that the nav
> s
OK
My Z3801A came out of mothballs after 15 years in controlled storage and
appears to be behaving. now I am curious as to what I am seeing
First I am not truly a "time" nut ( I am semi retired and have not worn
a watch since October 12th 2008 :-) ). I am probably more of "frequency"
nut . I
Dave,
Plot the #SV tracked and signal strength(s) over a couple of days. See if your
once or twice a day glitches correlate to periods of low reception.
To see what the reception of other z3801a owners look like:
http://www.realhamradio.com/GPS_websites_list.htm
You may even want to try a lowe
Jim,
On 01/28/2016 01:22 PM, jimlux wrote:
On 1/27/16 11:46 PM, Magnus Danielson wrote:
Fellow time-nuts,
Here is the official statement.
Cheers,
Magnus
I know we're all time-nuts here and not position-nuts. The thing in the
statement that was intriguing was about GPS guided munitions.
1
Tom,
On 01/28/2016 04:58 PM, Tom Van Baak wrote:
I've not been following this discussion too closely, but were the nav
solutions from the GPS steady and continuous during the event (that is,
was just a time discontinuity). I'm guessing that since the problem was
only in the "how to convert from
Poul-Henning,
On 01/28/2016 11:27 PM, Poul-Henning Kamp wrote:
In message <56aa6aa2.6050...@rubidium.dyndns.org>, Magnus Danielson writes:
And, did this "ripple in the force" cause all those NTP synchronized
clocks to hiccup (if a NTP ticker is UTC driven vs GPS driven)
NTP bumping
In message <56aa6aa2.6050...@rubidium.dyndns.org>, Magnus Danielson writes:
>> And, did this "ripple in the force" cause all those NTP synchronized
>> clocks to hiccup (if a NTP ticker is UTC driven vs GPS driven)
>
>NTP bumping around 13,7 us... I'm not sure I *really* care for most usag
What was interesting was in addition to the bump was that the Garmin nav
receiver in the car was unable to get a fix until it did a full cold start
Content by Scott
Typos by Siri
> On Jan 28, 2016, at 5:37 PM, Magnus Danielson
> wrote:
>
> Poul-Henning,
>
>> On 01/28/2016 11:27 PM, Poul-Henn
I am considering the M12M upgrade board for my JLT Fury.
Could someone who has done this upgrade mind posting some comments or a brief
review.
Thanks,
Mark
N2MD
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Tonight I got a GPS Lock light. Bravo!
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and follow the instructions there.
Please describe your Antenna setup and location.
How much of the sky can it see, in which directions.
Which directions are blocked for direct line of sight, and must depend on
reflections from nearby buildings or objects?
--- Graham
==
On Thu, Jan 28, 2016 at 11:25 AM, Tom Van Baak wrote:
> Da
John wrote:
Tonight I got a GPS Lock light. Bravo!
Patience is a virtue. ;-)
Remember this when it comes to all the other metrics -- settling to
good stability, in particular, which may take quite a while (weeks to
months) since the OCXO has been off for so long. My suggestion is to
put
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