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<mailto:wsjt-devel@lists.sourceforge.net> https://lists.sourceforge.net/lists/listinfo/wsjt-devel
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