The beacons could be attended stations that automatically broadcast time sync
data while WSJT software is running.
Brian Moran’s suggestion of manually setting system time while listening for
transmit start times is helpful, but only when audible signals are available.
In some circumstances, being able to communicate 13 characters at a time might
prove to be quite valuable, especially if no audible signals are available for
phone or other digital modes.
I understand that the demand for a WSJT time sync feature must be small. But I
do think it would be of value in today’s world. Sorry if I’m beating a dead
horse.
Dave
KD2JIP
From: Mike Besemer
Sent: Thursday, December 7, 2017 5:51 PM
To: 'WSJT software development'
Subject: Re: [wsjt-devel] DXPedition System Clock Sync
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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