Granted. This would be one relatively small detail. But assuming that a
number of other details are in order, including backup QRP gear stored under
sufficient EMI shielding, it would be great to have such a reliable form of
communication available under worst-case conditions. Sorry, this is not a very
up-beat subject, although for me, it’s pretty exciting. I’m ready to meet my
Maker, so everything else is adventure.
Dave
KD2JIP
From: Gil Baron W0MN
Sent: Thursday, December 7, 2017 6:06 PM
To: WSJT software development
Subject: Re: [wsjt-devel] DXPedition System Clock Sync
If we get GPS knocked out by emp we have a lot more to worry about than the
WSJT community.
iPad Gil W0MN
Hierro Candente Batir de Repente
44.08226 N 92.51265 W
> On Dec 7, 2017, at 4:49 PM, Mike Besemer <mwbese...@cox.net> wrote:
>
> Remember that in the U.S., automatically controlled beacons are not legal
> below 28.0 MHz.
>
> It would be much more efficient to encode time data within existing QSO data
> in the datastream.
>
> Mike
> WM4B
>
>
>
> From: Dave Corsello [mailto:kd2...@gmail.com]
> Sent: Thursday, December 7, 2017 5:39 PM
> To: WSJT software development
> Subject: Re: [wsjt-devel] DXPedition System Clock Sync
>
> Ria,
>
> Yes, I just ordered a cheap GPS receiver. I’m looking forward to using it
> with my Windows 10 tablet.
>
> Two of my primary interests are emergency communication and finding ways to
> function as off-gird as possible. To me, GPS is part of the grid, as
> vulnerable to failure as any other part. I’m knocked out by WSJT’s ability
> to perform under adverse conditions, and would love to see it freed from its
> dependence on local access to NTP. A network of WSJT “time servers” would be
> a grid of sorts, and would be tied to UTC. But each beacon could be an
> off-grid QRP rig, and NTP would not need to be available globally for it to
> work. Actually, a WSJT beacon network that’s in sync with itself could
> function independent of UTC.
>
> Of course, CW is as off-grid as it gets, although it requires an audible
> signal…
>
> 73
> Dave
> KD2JIP
>
> From: Ria Jairam
> Sent: Thursday, December 7, 2017 4:32 PM
> To: WSJT software development
> Subject: Re: [wsjt-devel] DXPedition System Clock Sync
>
> Hi Dave,
>
> It was discussed and while it seems like a nice idea, I don't think it
> gained much traction among the dev team. Either way, GPS seems to be
> the most ubiquitous method to get time sync, as the satellites cover
> most of the Earth and receivers are very cheap. Even my DSTAR HT has
> one and I can access the GPS over bluetooth for time sync.
>
> 73
> Ria, N2RJ
>
>> On Thu, Dec 7, 2017 at 3:55 PM, Dave Corsello <kd2...@gmail.com> wrote:
>> Thanks, RIa. I did see more than one thread on time sync in which GPS was
>> discussed. I’m new to the list and was trying to contribute to a thread
>> from November, in which they were discussing alternatives to GPS. I didn’t
>> see any suggestions regarding a WSJT mode for time sync. Maybe I didn’t
>> look hard enough or maybe it’s too outlandish an idea.
>>
>>
>>
>> Given the current state of geo-politics, I think the probability of GPS
>> being knocked out by EMP is greater than zero. So I thought it was
>> worthwhile to continue the discussion.
>>
>> 73
>>
>> Dave
>>
>> KD2JIP
>>
>>
>>
>> From: Ria Jairam
>> Sent: Thursday, December 7, 2017 3:25 PM
>> To: WSJT software development
>> Subject: Re: [wsjt-devel] DXPedition System Clock Sync
>>
>>
>>
>> I think this was discussed before and the consensus was that they
>>
>> could just use a GPS receiver instead.
>>
>>
>>
>> 73
>>
>> Ria, N2RJ
>>
>>
>>
>>> On Thu, Dec 7, 2017 at 3:18 PM, Dave Corsello <kd2...@gmail.com> wrote:
>>>
>>> Would it make sense to develop a new WSJT mode for time sync? One
>>
>>> implementation might be through dedicated stations that grab UTC via NTP
>>> and
>>
>>> broadcast it, and an option in WSJT software to listen for the beacon,
>>
>>> calculate an offset between local system time and the received code, and
>>
>>> apply it to other modes during the current session. Not a lot to ask,
>>
>>> right?
>>
>>
>>
>>>
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>>
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>>
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>>
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>>
>>
>>
>>
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>>
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