I’m not sure how long the atmosphere would stay mucked up either. I was involved in some research on such stuff back in the 80’s, but it was classified clearance level so I never knew what they figured out.
Mike WM4B From: Dave Corsello [mailto:kd2...@gmail.com] Sent: Thursday, December 7, 2017 7:05 PM To: WSJT software development Subject: Re: [wsjt-devel] DXPedition System Clock Sync LOL. I hear you. As I said, you would have to keep an entire backup rig, including solar battery power and tablet, under EMI shielding. My hope is that I’m not the only one who is doing this! And yes, you would have to wait for conditions to settle down. Not sure how long that would take. As North Korea probably can’t get a warhead to survive reentry yet, my unresearched speculation is that a high-altitude detonation might be easier. I think the deterrence factor is very much at play, though. No one wants to launch first. Dave KD2JIP From: Mike Besemer Sent: Thursday, December 7, 2017 6:45 PM To: 'WSJT software development' Subject: Re: [wsjt-devel] DXPedition System Clock Sync If an EMP takes out GPS, there’s a good chance our ham gear and computers will be gone too… along with the power grid. Some of us who still have some hollow-state gear in reserve might still be able to get on the air if we can get electricity, so CW will probably be the mode-of-the-day. Propagation will likely be poor too as a result of the EMP and nuclear explosion. Personally, if the bomb is heading towards me, I plan on trying to be directly underneath it. Mike WM4B From: Dave Corsello [mailto:kd2...@gmail.com] Sent: Thursday, December 7, 2017 6:27 PM To: WSJT software development Subject: Re: [wsjt-devel] DXPedition System Clock Sync 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? >> >> >> >>> >>> ------------------------------------------------------------------------------ >> >>> Check out the vibrant tech community on one of the world's most >> >>> engaging tech sites, Slashdot.org! http://sdm.link/slashdot >> >>> _______________________________________________ >> >>> wsjt-devel mailing list >> >>> wsjt-devel@lists.sourceforge.net >> >>> https://lists.sourceforge.net/lists/listinfo/wsjt-devel >> >> >> >> >> ------------------------------------------------------------------------------ >> >> Check out the vibrant tech community on one of the world's most >> >> engaging tech sites, Slashdot.org! http://sdm.link/slashdot >> >> _______________________________________________ >> >> wsjt-devel mailing list >> >> wsjt-devel@lists.sourceforge.net >> >> https://lists.sourceforge.net/lists/listinfo/wsjt-devel >> >> >> >> >> ------------------------------------------------------------------------------ >> Check out the vibrant tech community on one of the world's most >> engaging tech sites, Slashdot.org! http://sdm.link/slashdot >> _______________________________________________ >> wsjt-devel mailing list >> wsjt-devel@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/wsjt-devel > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > wsjt-devel mailing list > wsjt-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/wsjt-devel > > > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > wsjt-devel mailing list > wsjt-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/wsjt-devel ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel
