GPSD (Linux and OSX should be able to run this) can sync time to the computer from a GPS receiver... I've used that in the past on where internet access is problematic and time sync was critical. A cheap USB GPS unit could then be purchased (I've seen them as low as $5 on US sites, and around $2 on alibaba/aliexpress) for that purpose. Plug in the GPS, run GPSD, sync, go.
It'd be very difficult for a computer to be off on its dT if it was continually syncing time to the GPS satellites... There's an old saying in IT.. something about programming idiot-proof software causing bigger idiots to be created... I forget the exact wording. 73 de AI8W, Chris On Sun, Jun 23, 2019 at 5:57 PM Mike Lewis <k7...@hotmail.com> wrote: > You could use the DT of the received stations to adjust the clock. > > > > Select a group with the largest agreement within a narrow range of a few > tenths of a second, and the program, or a program, can offer to adjust the > time into that range. Sort of like a wire protocol that derives its own > clock sync from the data stream. The change mechanism could be a > calculation or a manual slider. > > > > *From:* Jim Jennings <w...@comcast.net> > *Sent:* Sunday, June 23, 2019 14:15 > *To:* Black Michael <mdblac...@yahoo.com>; WSJT software development < > wsjt-devel@lists.sourceforge.net> > *Subject:* Re: [wsjt-devel] Field Day time problem > > > > When one of our stations at Field Day was set up for FT8, it became > apparent that a system time sync was needed before it could be used. One > of our participants was able to provide a NTP sync with his smart phone, > and W6AF (2A SV) managed a couple dozen contacts on 20 Meters with five > watts (Yaesu FT-817) into a low dipole. What about a location where > cellular or WiFi coverage is unavailable? > > > > VK4ADC’s free program GPS2Time can synchronize a computer’s system clock > using a GPS set with NMEA serial output (I have two hand held Garmins that > do this) through a COM port. The website is: > > https://www.vk4adc.com/web/software-projects/55-vk4adc-utils/181-gps2time. > If I had known about this prior to Field Day, I would have brought the > program and the essential items to try it. > > > > Jim, W7XZ > > > > PS FT8 was a big hit with the ops who tried it for the first time. > > *From:* Black Michael via wsjt-devel > > *Sent:* Sunday, June 23, 2019 05:27 > > *To:* WSJT Software Development > > *Cc:* Black Michael > > *Subject:* [wsjt-devel] Field Day time problem > > > > I've seen about 2 dozen clubs doing Field Day where their clocks are off. > > > > We need to provide an indication in WSJT-X when clocks are off like this. > > > > With concurrence I can do a patch for this....my idea is this. > > > > At least 5 decodes where 60% or more > 0.5 seconds is an indication of bad > timing. > > A message would be put in the Rx Frequency window "Your clock is off...see > help". With appropriate references in the Help to search "your clock is > off" and time solutions. > > > > This doesn't cover the case where their clock is way off as they won't see > any decodes. The only solution for that would be doing a time query from a > known source and I don't think we want to go that route. > > > > de Mike W9MDB > > > > > ------------------------------ > ------------------------------ > > _______________________________________________ > wsjt-devel mailing list > wsjt-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/wsjt-devel > _______________________________________________ > wsjt-devel mailing list > wsjt-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/wsjt-devel >
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